DRAIN GUARD ASSEMBLY AND SYSTEM

Abstract

A roof drain assembly includes a drain body, a gravel guard, and a cover. The drain body includes an inlet, an outlet, and a conduit between said inlet and outlet. The gravel guard includes a frame having a top opening, a bottom opening, a plurality of castellations separated from each other by a plurality of gaps. The gravel guard may be removably coupled to the drain body or integral with the drain body. The cover is configured to be removably coupled to a top surface of the gravel guard (e.g., at least a portion of the plurality of castellations). The cover includes a plurality of openings configured to allow fluid to flow therethrough into the drain body.

Claims

1. A roof drain assembly comprising: a drain body having an inlet, an outlet, and a conduit between said inlet and outlet; a gravel guard having a frame having a top opening, a bottom opening, a plurality of castellations separated from each other by a plurality of gaps, wherein the gravel guard is configured to be removably coupled to the drain body; and a cover configured to be removably coupled to a top surface of the gravel guard, the cover including a plurality of openings configured to allow fluid to flow therethrough into the drain body.

2. The roof drain assembly of claim 1, wherein the cover is configured to be removably coupled to a top surface of at least a portion of the plurality of castellations.

3. The roof drain assembly of claim 1, wherein the cover includes a cover alignment key and wherein gravel guard includes a guard alignment key configured to engage with the cover alignment key to align the cover relative to the gravel guard.

4. The roof drain assembly of claim 3, wherein the cover includes a cover flange including the cover alignment key and wherein at least one of the plurality of castellations includes the guard alignment key.

5. The roof drain assembly of claim 4, wherein the cover alignment key and the guard alignment key include a protrusion configured to be received in a recess.

6. The roof drain assembly of claim 1, wherein at least one of the plurality of castellations includes a cover connector configured to removably secure the gravel guard to the cover.

7. The roof drain assembly of claim 1, wherein substantially the entire cover is disposed above the top surface of the gravel guard.

8. The roof drain assembly of claim 1, wherein the cover is removably secured to the gravel guard using one or more biased tabs.

9. The roof drain assembly of claim 8, wherein the cover includes a cover flange and wherein the biased tab engages the cover flange.

10. The roof drain assembly of claim 8, wherein the biased tab is configured to apply a compressive for that urges the cover against the gravel guard.

11. The roof drain assembly of claim 8, wherein the biased tab is secured to one of the plurality of castellations.

12. The roof drain assembly of claim 11, wherein the biased tab is secured to a threaded aperture extending through the top surface of the one of the plurality of castellations.

13. The roof drain assembly of claim 8, wherein the biased tab is configured to rotate between a secured position in which the cover is secured to the gravel guard and a release position in which the cover is removable from the gravel guard.

14. The roof drain assembly of claim 1, further comprising a web coupling the plurality of castellations together.

15. A roof drain assembly comprising: a drain body having an inlet, an outlet, and a conduit between said inlet and outlet; a gravel guard having a frame having a top opening, a bottom opening, a plurality of castellations separated from each other by a plurality of gaps, wherein the drain body and the gravel guard are a single part; and a cover configured to be removably coupled to a top surface of the gravel guard, the cover including a plurality of openings configured to allow fluid to flow therethrough into the drain body.

16. The roof drain assembly of claim 15, wherein the cover is configured to be removably coupled to a top surface of at least a portion of the plurality of castellations.

17. The roof drain assembly of claim 15, wherein the cover includes a cover alignment key and wherein gravel guard includes a guard alignment key configured to engage with the cover alignment key to align the cover relative to the gravel guard.

18. The roof drain assembly of claim 17, wherein the cover includes a cover flange including the cover alignment key and wherein at least one of the plurality of castellations includes the guard alignment key.

19. The roof drain assembly of claim 15, wherein the cover is removably secured to the gravel guard using one or more biased tabs.

20. The roof drain assembly of claim 19, wherein the biased tab is configured to move between a secured position in which the cover is secured to the gravel guard and a release position in which the cover is removable from the gravel guard, and wherein the biased tab is configured to apply a compressive for that urges the cover against the gravel guard.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0003] Reference is now made to the following detailed description which should be read in conjunction with the following figures, wherein like numerals represent like parts:

[0004] FIG. 1A depicts a perspective view of one example of an assembled drain guard assembly consistent with the present disclosure.

[0005] FIG. 1B depicts a perspective view of one example of an exploded view of a drain guard assembly consistent with the present disclosure.

[0006] FIG. 2A depicts a perspective view of one example of the drain body consistent with the present disclosure.

[0007] FIG. 2B depicts a perspective view of another example of the drain body consistent with the present disclosure.

[0008] FIG. 3 depicts a perspective view of one example of the gravel guard consistent with the present disclosure.

[0009] FIG. 4A depict a top perspective view of one example of the cover consistent with the present disclosure.

[0010] FIG. 4B depict a bottom perspective view of the cover of FIG. 4A.

[0011] FIG. 5A depicts the cover aligned with the gravel guard in a first position.

[0012] FIG. 5B depicts the cover aligned with the gravel guard in a second position.

[0013] FIG. 5C depicts a tab aligned with the cover in a first position.

[0014] FIG. 5D depicts a tab aligned with the cover in a second position.

[0015] FIG. 6A depicts one example of the alignment key of the gravel guard and the corresponding notch in the cover consistent with the present disclosure.

[0016] FIG. 6B depicts one example of the alignment key of the gravel guard mated with the corresponding notch in the cover consistent with the present disclosure.

[0017] FIG. 7A depicts one example of the alignment of the gravel guard relative to the drain body consistent with the present disclosure.

[0018] FIG. 7B depicts one example of the gravel guard mechanically engaged with the drain body consistent with the present disclosure.

[0019] FIG. 8 depicts a cross-sectional view of one example of a drain guard system installed in a roof consistent with the present disclosure.

[0020] FIG. 9 depicts a bottom perspective view of the drain guard system of FIG. 8.

DETAILED DESCRIPTION

[0021] With the foregoing in mind, one example of the present disclosure generally relates to a drain guard assembly and a drain guard system. FIG. 1A depicts one example of the roof drain assembly 10 in an assembled state and FIG. 1B depicts one example of the roof drain assembly 10 in an exploded state. As shown, the roof drain assembly 10 includes a drain body 11, a gravel guard 12, and a cover 13. Drain body 11 and cover 13 may mechanically engage with opposite sides of the gravel guard 12 as shown in FIG. 1A. Mechanically engage refers to the releasable fixation of two elements such as by means of fasteners, interlocking, threading, latching, etc. Gravel guard 12 may alternatively be integral with drain body 11 where integral refers to a permanent fixation such as through adhesives, welding, or co-forming where the combination of the two elements is considered to create one cohesive element.

[0022] FIG. 2A depicts one example of the drain body 11 of the embodiment of the roof drain assembly 10 shown in FIGS. 1A and 1B. Drain body 11 may have an inlet 20 and an outlet 21 connected by a conduit 22. As may be appreciated, the inlet 20 is configured to receive liquid (e.g., water) which is on the roof (e.g., the top surface of the roof) and the outlet 21 may be configured to be coupled to a drainpipe system (not shown for clarity).

[0023] Inlet 20 may have a cross-sectional geometry, such as, but not limited to, a square, circle, oval, polygon, etc. Outlet 21 may have a cross-sectional geometry such as, but not limited to, a square, circle, oval, polygon, etc. The area within the cross-sectional geometry of the inlet 20 may be larger than the area within the cross-sectional geometry of the outlet 21. The conduit 22 connecting the inlet 20 and outlet 21 may include one or more tapered regions or tubes where the cross-sectional area of the conduit 22 decreases in the direction from the inlet 20 to the outlet 21. The tapered regions or tubes may have a convex taper and/or concave taper. The tapered regions or tubes may have a constant taper or may include a plurality of different tapers. Alternatively, the conduit 22 may have a constant cross-section (e.g., diameter) such that a 90 degree angle is formed between the inlet 20 and the conduit 22, and the cross-section (e.g., diameter) of the conduit 22 may correspond to the cross-section (e.g., diameter) of the outlet 21.

[0024] The drain body 11 may also optionally include a flange 23. The flange 23 may extend outward along the perimeter of the inlet (e.g., radially outward along the edge of inlet 20). As discussed herein, a roofing membrane and/or gravel may be disposed on and/or above at least a portion of the flange 23. The flange 23 may be disposed outwardly (e.g., radially outwardly) beyond the gravel guard 12 and/or the cover 13). The drain body 11 (e.g., the flange 23 and/or the conduit 22) may also optionally include one or more apertures to receive fasteners (e.g., screws, bolts, or nails or the like) to secure the drain body 11 to the roof.

[0025] Optionally, the drain body 11 may include one or more drain body connectors 24 configured to facilitate the mechanical engagement of drain body 11 with gravel guard 12. The drain body connectors 24 may include apertures (e.g., threaded apertures) configured to at least partially receive a fastener (e.g., a bolt or the like). The drain body connectors 24 may also include a threaded stud, e.g., an upwardly extended threaded stud configured to engage with a nut or the like to removably secure the drain body 11 to the gravel guard 12. Alternatively, gravel guard 12 may be integral with drain body 11 at the inlet 20.

[0026] In at least one example, the drain body 11 may include at least one gravel guard recess, notch, groove, or the like 25 (hereinafter generally referred to a gravel guard recess 252 for the sake of convenience) configured to receive a portion (e.g., a bottom region) of the gravel guard 12. The gravel guard recess 25 may extend around all or a portion of the drain body 11 and may aid in locating the gravel guard 12 relative to the drain body 11. In the illustrated example, the gravel guard recess 25 may be disposed radially inward and proximate to the flange 23. The support flange 26 of the gravel guard 12 (discussed below) to be closer to (e.g., flush with) the flange 23 of the drain body 11, thereby reducing the build-up of fluid proximate to the gravel guard 12.

[0027] FIG. 2B depicts another example of the drain body 11 of the embodiment of the roof drain assembly 10 shown in FIGS. 1A and 1B. The drain body 11 may have a plurality of ribs and/or channels 29 configured to be exposed to the flow of fluid (e.g., water) through the drain body 11. The plurality of ribs and/or channels 29 may extend partially or completely between the inlet 20 and outlet 21. The plurality of ribs and/or channels 29 may enhance flow of fluid (e.g., water) through the drain body 11 compared to a smooth surface.

[0028] FIG. 3 depicts one example of a gravel guard 12 consistent with the roof drain assembly 10 shown in FIG. 1. The gravel guard 12 may comprise a frame 32 having a top opening 30 and a bottom opening 31. The frame 32 may further include one or more castellations 33 separated by a plurality of gaps 34. For example, the castellations 33 may extend generally upward away from a top surface 26a of support flange 26. The castellations 33 may be solid and/or partially hollow. For example, an internal surface 33a of the castellations 33 may be hollow to reduce the amount of material used to form the gravel guard 12. Each castellation 33 may be separated from adjacent castellations 33 by two or more gaps 34. The gaps 34 may be disposed above the top surface 26a of the support flange 26 between adjacent castellations 33. The gaps 34 may be configured to allow fluid (e.g., water) to flow into the drain body 11 while generally preventing debris (e.g., stones, leaves, twigs, etc.) from passing into the drain body 11. The exact size and shape of the gaps 34 and/or the castellations 33 may therefore depend on the intended application. In general, the castellations 33 and gaps 34 should be sized and shaped to allow a sufficient amount of fluid to flow into the drain body 11 while generally preventing debris that could become stuck in the drain system from entering. In addition, the gravel guard 12 (e.g., the castellations 33) should have an overall height H sufficient to generally prevent the stones/gravel proximate the roof drain assembly 10 from falling into the drain body 11 when the roof drain assembly 10 is installed in the roof and the cover 13 is removed. As such, the overall height H of the gravel guard 12 will therefore depend on the intended application. One or more of the castellations 33 may optionally have an inclined outer surface 33c. For example, the inclined outer surface 33c may cause the thickness T of the castellation 33 to decrease along the height of the castellation 33 from the bottom opening 31 to the top opening 30.

[0029] As depicted in the embodiment shown in FIG. 3, the top opening 30 may generally be defined by the top surface 33b of the castellations 33 and the bottom opening 31 may generally be defined by the bottom surface 26b of the support flange 26. By way of non-limiting examples, the top opening 30 and/or the bottom opening 31 may have a generally square, circle, oval, polygon, etc. cross-sectional geometry.

[0030] One or more of the castellations 33 may include a benching surface 35. The benching surfaces 35 may be disposed on at least a portion of the top surface 33b of the castellations 33. The benching surface 35 may be configured to provide an interface that supports the cover 13 to when the cover 13 is secured to the gravel guard 12. In one example, each of the plurality castellations 33 at least partially defines a benching surface 35. Alternatively, one or more of the castellations 33 may not include a benching surface 35. In this example, the castellations 33 which do not include a benching surface 35 may be shorter than the castellations 33 which do have a benching surface 35. The non-benching surface castellations 33 may define a gap between the gravel guard and cover 13 configured to allow fluid (e.g., water) to flow into the drain body 11 while generally preventing the ingress of debris.

[0031] The bottom surface 26b of the support flange 26 may be configured to removably secured to the drain body 11. In at least one example, the bottom surface 26b of the support flange 26 may be configured to be at least partially received in the gravel guard recess 25 (FIGS. 2A and 2B) formed in the drain body 11. The bottom surface 26b may be substantially continuously engage (e.g., contact) the drain body 11 (e.g., the gravel guard recess 25). Alternatively, the bottom surface 26b may contact the drain body 11 (e.g., the gravel guard recess 25) at discrete regions which are separated by gaps. The gaps may be configured to allow fluid (e.g., water) to flow into the drain body 11 while generally preventing debris (e.g., stones, leaves, twigs, etc.) from passing into the drain body 11.

[0032] The gravel guard 12 may preferably include one or more guard connectors 37 configured to cooperate with the one or more drain body connectors 24 to facilitate the mechanical engagement of the gravel guard 12 with the drain body 11. The guard connectors 37 may include apertures (e.g., threaded apertures) configured to at least partially receive a fastener (e.g., a bolt or the like). The guard connectors 37 may also include a threaded stud, e.g., an upwardly extended threaded stud configured to engage with a nut or the like to removably secure the drain body 11 to the gravel guard 12. In at least one example, one or more drain body connectors 24 includes a threaded aperture and one or more the guard connectors 37 include an aperture. With reference to FIGS. 7A-7B, a threaded bolt 15 (FIG. 1) may pass through the guard connectors 37 and threadably engage the drain body connectors 24. The bolt 15 may include a head which is exposed on the upper surface of the roof drain assembly 10

[0033] Optionally, the gravel guard 12 may include one or more cover connectors 38 configured to facilitate the mechanical engagement of gravel guard 12 with the cover 13. The cover connectors 38 may include apertures (e.g., threaded apertures) configured to at least partially receive a fastener (e.g., a bolt or the like). The cover connectors 38 may also include a threaded stud, e.g., an upwardly extended threaded stud configured to engage with a nut or the like to removably secure the gravel guard 12 to the cover 13. The cover connectors 38 may be formed in one or more of the castellations 33. In at least one example, the cover connectors 38 may optionally be formed in the benching surface 35 of the castellations 33.

[0034] Optionally, the gravel guard 12 may include one or more guard alignment keys 39 configured to facilitate the alignment of the gravel guard 12 with the cover 13 upon mechanical engagement. The guard alignment keys 39 may be formed in one or more of the castellations 33. In at least one example, the guard alignment keys 39 may include one or more protrusions or tabs. The protrusion or tab may extend generally upwardly (e.g., away from the top opening 30). The protrusion or tab may be disposed along the internal surface 33a of the castellations 33. Alternatively (or in addition), the guard alignment keys 39 may include one recesses or notches configured to receive a portion of the cover 13 to align the gravel guard 12 with the cover 13.

[0035] While the gravel guard 12 has been illustrated having a plurality of castellations 33, it should be appreciated the plurality of castellations may be coupled together at by a web. The web may couple, for example, the top surface 33b of the castellations 33 together to form, for example, a substantially continuous mating or benching surface 35 between the gravel guard 12 and the cover 13.

[0036] FIGS. 4A & 4B depict one example of the cover 13 of the roof drain assembly 10 shown in FIG. 1. Cover 13 includes a cover flange 42 and one or more cover sidewalls 40 extending from the cover flange 32. The cover flange 42 is configured to be removably secured to the gravel guard 12 as described herein. In at least one example, the cover flange 42 may extend radially outward beyond the one or more cover sidewalls 40. For example, the cross-sectional dimensions of the cover flange 42 may be larger than the cross-sectional dimensions of the one or more cover sidewalls 40.

[0037] The cover sidewalls 40 may include a plurality of openings 48 disposed between a plurality of ribs 49. The plurality of openings 48 are configured to allow fluid (e.g., water) to flow into the drain body 11 while generally preventing debris (e.g., stones, leaves, twigs, etc.) from passing into the drain body 11. The exact size and shape of the openings 48 may therefore depend on the intended application. In general, the openings 48 should be sized and shaped to allow a sufficient amount of fluid to flow into the drain body 11 while generally preventing debris that could become stuck in the drain system from entering.

[0038] The cover sidewalls 40 may optionally have an inclined outer surface 49b such that the outer cross-sectional dimension of the cover sidewalls 40 is smaller as the distance away from the cover flange 42 increases. In at least one example, the ribs 49 may have a generally triangular shape, with the hypotenuse defining the outer surface 49b.

[0039] The cover sidewalls 40 may extend all the way around the top surface of the cover 13. For example, the cover sidewalls 40 may form a generally dome shape. Alternatively, the cover 13 may include a top wall 47. The top wall 47 may be solid or may include a plurality of openings 47a. Similar to openings 48, the openings 47a are configured to allow fluid (e.g., water) to flow into the drain body 11 while generally preventing debris (e.g., stones, leaves, twigs, etc.) from passing into the drain body 11. The exact size and shape of the openings 47a may therefore depend on the intended application. In general, the openings 47a should be sized and shaped to allow a sufficient amount of fluid to flow into the drain body 11 while generally preventing debris that could become stuck in the drain system from entering. The openings 48 and 47a may also be configured to allow air to vent out from the drain body 11 (and the rest of the drain system) as water enters the drain body 11.

[0040] The bottom surface 42b of the cover flange 42 may be configured to be removably secured to the castellations 33. For example, the bottom surface 42b of the cover flange 42 may be configured to be removably secured to the top surface 33b of the castellations 33 such as, but not limited to, the benching surfaces 35, cover connectors 38, and/or cover alignment keys 39. By securing the cover 13 to the top surface 33b of the castellations 33 of the gravel guard 12, overall diameter of the cover 13 relative to the flange 11 may be maximized. In particular, prior roof drains include a cover/dome that is disposed that is disposed at least partially within the perimeter of a gravel guard/ring. As a result, the maximum cross-section of the cover/dome (e.g., proximate the interface between the cover/dome and the gravel guard/ring) is limited to the internal cross-section of the gravel guard/ring. The reduced cross-section of the cover/dome limits the amount of water that can flow into the roof drain. In addition, the reduced cross-section of the cover/dome is more prone to clogging because the overall surface is reduced compared to the present disclosure. In contrast, the cross-section of the cover 13 of the present disclosure is not limited by the internal cross-section of the gravel guard 12. Instead, the cross-section of the cover 13 of the present disclosure may be substantially the same as the cross-section of the of the gravel guard 12 proximate the interface between the cover 13 and the gravel guard 12.

[0041] In addition, by securing the cover 13 to the top surface 33b of the castellations 33 of the gravel guard 12, the entire (or substantially the entire) cover 13 may be disposed above the gravel guard 12. Having the cover 13 disposed above the gravel guard 12 may allow the cover 13 to be removed without having to remove the gravel guard 12. By way of a non-limiting example, substantially the entire cover 13 being disposed above the gravel guard may include (but is not limited to) having the cover alignment keys 46 disposed below the top surface of the gravel guard 12.

[0042] In at least one example, the bottom surface 42b of the cover flange 42 may be continuous surface extending all the way around the perimeter of the cover 13. Alternatively, the bottom surface 42b of the cover flange 42 may be formed from a plurality of discrete regions which generally correspond to one or more of the castellations 33 (e.g., but not limited to, the top surface 33b of one or more of the castellations 33).

[0043] The cover flange 42 may optionally include one or more cover alignment keys 46. With reference to FIGS. 6A-6B, the cover alignment keys 46 may be configured to cooperate with the guard alignment keys 39 of the gravel guard 12 to aid in aligning the cover 13 relative to the gravel guard 12. One or more of the cover alignment keys 46 may be located on at least a portion of the bottom surface 42b of the cover flange 42. In at least one example, the cover alignment keys 46 may include one or more protrusions or tabs. The protrusion or tab may extend generally downwardly (e.g., towards the top opening 30 of the gravel guard 12 when installed). Alternatively (or in addition), the cover alignment keys 46 may include one recesses or notches. Of course, the cover alignment keys 46 and the guard alignment keys 39 are not limited to these configurations unless specifically claimed as such. In any case, the cover alignment keys 46 and the guard alignment keys 39 are configured to generally align the cover 13 relative the gravel guard 12.

[0044] The cover flange 42 may include one or more guard openings, notches and/or recesses 45 disposed in the outer perimeter of the cover flange 42 which correspond (e.g., are aligned with) the locations of the one or more drain body connectors 24 and/or one or more the guard connectors 37. The guard openings, notches and/or recesses 45 may be sized and shaped to allow a tool to access the bolt 15 (FIG. 1) and/or allow the head of the bolt 15 to pass therethrough, thereby allowing the gravel guard 12 to be removed from the drain body 11. Optionally, the gravel guard 12 and the cover 13 can be simultaneously removed from the drain body 11 without having to separately remove the cover 13 from the gravel guard 12. The guard openings, notches and/or recesses 45 may also provide a convenient visual indicator to locate the positions of the bolts 15.

[0045] The cover flange 42 may include one or more cover retention regions 44. The cover retention regions 44 are configured to removably secure the cover 13 to the gravel guard 12. As noted herein, the cover 13 (e.g., the bottom surface 42b of the cover flange 42) is configured to be removably secured to the gravel guard 12 (e.g., the castellations 33). The cover retention regions 44 may be configured to allow a retainer to removably secure the cover 13 to the gravel guard 12. With reference to FIG. 5A-5D, the cover retention regions 44 may be configured to be aligned with the cover connectors 38. In at least one example, the cover 13 may be removably secured to the gravel guard 12 using one or more biased tabs or cams 50. The tabs or cams 50 may be configured to rotate to a release position (see FIG. 5C) and a secured position (see FIG. 5D). In the release position, the tabs or cams 50 may be aligned in a position that allows the cover 13 to be mounted to or removed from the gravel guard.

[0046] In the secured position, the tabs or cams 50 may be moved (e.g., rotate and/or pivot) from the release position such that the tabs or cams 50 are located above a portion of the cover 13 (e.g., the cover flange 42). In at least one example, one or more biasing members (e.g., a bolt and/or a spring) may apply a compressive force against the tabs or cams 50 that biases/urges the tabs or cams 50 against the cover 12 (e.g., cover flange 42). Alternatively (or in addition), one or more biasing members (e.g., a bolt and/or a spring) may apply a rotational force against the tabs or cams 50 that biases/urges the tabs or cams 50 against the cover 12 (e.g., cover flange 42). For example, the rotational force may urge the tabs or cams 50 against a shoulder or like.

[0047] In the illustrated example, a fastener 44c (e.g., a bolt having a head) is configured to be threaded inserted into the cover connectors 38 of the gravel guard 12. As the fastener 44c is threaded into the cover connectors 38, the fastener 44c applies a compressive force against the tabs or cams 50, thereby securing the cover 13 to the gravel guard 12 when the tabs or cams 50 are in the secured position.

[0048] The cover 12 (e.g., the cover flange 42) may optionally include a recessed region 44a that is sized and shaped to receive at least a portion of the tabs or cams 50 when rotated into the secured position. The recessed region 44a may include a generally arcuate recess and/or a semi-circular recess. The recessed region 44a may aid in aligning the cover 13 relative to the gravel guard 12.

[0049] The cover retention regions 44 may optionally include a notch 42b (best seen in FIG. 5A) configured to allow a portion of the tabs or cams 50 and/or the head of a fastener 44c to pass through the cover 13 (e.g., the cover flange 42) when the cover 13 is removed from the gravel guard 12.

[0050] Turning now to FIGS. 8-9, one example of the roof drain assembly 10 installed in a roof is generally illustrated. As can be seen, the drain body 11 is inserted into a hole 89 formed in the support surface (e.g., decking) 80 of the roof. The drain body 11 may be secured to the support surface 80 in any manner known to those skilled in the art such as, but not limited to, using a clamp 81 and clamp pin 82. A membrane 83 (such as a waterproof membrane) may extend over at least a portion of the drain body 11 (such as, but not limited to, the drain body flange 23) to generally prevent fluid (e.g., water) from getting underneath the roof drain assembly 10 (e.g., between the drain body 11 and the support surface 80). Gravel (e.g., stones or the like) 84 may be placed on top of the membrane 83. The gravel 84 may extend over the top of the drain body 11, e.g., the drain body flange 23. The height H of the gravel guard 12 may be equal to or greater than the height G of the gravel 84 proximate the roof drain assembly 10.

[0051] As used herein, the term substantially when used in reference to a value, a range, and/or a definition means +/5% of the value, the end points of the range, and/or the absolute definition.

[0052] The terms and expressions which have been employed herein are used as terms of description and not of limitation, and there is no intention, in the use of such terms and expressions, of excluding any equivalents of the features shown and described (or portions thereof), and it is recognized that various modifications are possible within the scope of the claims. Accordingly, the claims are intended to cover all such equivalents. Various features, aspects, and embodiments have been described herein. The features, aspects, and embodiments are susceptible to combination with one another as well as to variation and modification, as will be understood by those having skill in the art. The present disclosure should, therefore, be considered to encompass such combinations, variations, and modifications.