Low profile circular drain with water stop for swimming pool

Abstract

A sump drain includes a ring-shaped chamber having an inner sidewall with a diameter of at least about 18 inches and an outer sidewall, and a circular opening between the sidewalls preferably about an inch wide and optionally having a grid cover. Preferably the inner sidewall has a number of ports extending inwardly to radial conduits to a central hub for tying into a pool or spa filtering system, with the central hub operating as a clean out and having a removable cap. Upon installation, plaster substantially fills the space between the chamber and the central hub, such that the sump drain attractively blends in with the pool or spa floor. When installed, the top opening is preferably substantially flush with the pool or spa floor while being safely unblockable. And the sump drain preferably further includes channels both outboard and inboard from the chamber top opening and around the central hub, to help prevent water from passing through the plaster into the shotcrete of the pool or spa.

Claims

1. A low profile drain for installation in a surface of a swimming pool or spa formed of a surface material and having a drain inlet, the low profile drain comprising: a sump forming a top side defining an annular top opening, the sump forming an outer sidewall and an inner sidewall on opposite sides of the annular top opening, the outer sidewall having an upper peripheral edge about the annular top opening; the sump having a tray-shaped water stop extending radially therefrom and adjacent to the upper peripheral edge for catching migrating water and for embedded anchoring in the surface when installed; the sump extending to a central connection to the drain inlet, the sump defining an open chamber spanning beneath the annular top opening to receive water admitted therethrough, the sump being configured to maintain open communication between the annular top opening and the central connection, the annular top opening defined to extend without substantial interruption about the central connection; the sump being configured to receive water admitted through the annular top opening and guide the water to the central connection, wherein the sump is configured to accept a substantial amount of the surface material between the inner sidewall and the central connection.

2. The low profile drain of claim 1, wherein a portion of the sump is removable from above the central connection to access the drain inlet for purposes of cleaning out the drain inlet.

3. The low profile drain of claim 1 further comprising a drain cover coupled to the sump to cover the annular top opening.

4. A low profile drain for installation in a surface of a swimming pool or spa formed of a surface material and having a drain inlet, the low profile drain comprising: a sump forming a top side defining an annular top opening no less than about eighteen inches in inner diameter, the sump forming an outer sidewall and an inner sidewall on opposite sides of the annular top opening, the outer sidewall having an upper peripheral edge about the annular top opening; the sump having a tray-shaped water stop extending radially therefrom and adjacent to the upper peripheral edge for catching migrating water and for embedded anchoring in the surface material when installed; the sump extending to a central connection to the drain inlet, the sump being configured to maintain open communication between the annular top opening and the central connection, the annular top opening defined to extend without substantial interruption about the central connection; the sump being configured to receive water admitted through the annular top opening and guide the water to the central connection; and wherein the water stop includes a horizontal shelf and a vertical wall collectively forming a gutter, the water stop being endlessly looped about the outer sidewall, wherein the sump is configured to accept a substantial amount of the surface material between the inner sidewall and the central connection.

5. The low profile drain of claim 1, wherein both the inner and outer sidewalls are formed with the water stop, the water stop extending radially inward from the inner sidewall and radially outward from the outer sidewall.

6. The low profile drain of claim 1, wherein the sump defines a ring-shaped chamber, and a plurality of radial conduits extending between the ring-shaped chamber and the central connection.

7. The low profile drain of claim 2, wherein the central connection includes a hub extending upwardly to be about coplanar with the top annular opening.

8. The low profile drain of claim 7, wherein the portion of the sump removable from above the central connection includes a central cap no greater than about 2.5 inches in diameter.

9. A sump drain for installation in a surface of a swimming pool or spa formed of a surface material and having a drain inlet, sump drain comprising: a body configured to partially embed in the surface material and define a top opening through the surface material, the top opening configured to form a ring surrounded by and surrounding portions of the surface material when installed; the top opening in fluid communication with a hub, the hub being open to the drain inlet; the hub being smaller in circumference than the top opening, the hub being positioned below the top opening in elevation relative to the surface when installed and centered relative to the top opening radially inward of the top opening; a removable grid cover coupled to the body to span the top opening; a removable cap defined above the hub; and a water stop surrounding the annular top opening, the water stop extending from the sump drain and configured to be embedded within the surface material below the surface; wherein the top opening is defined to extend fully without substantial interruption about the hub, portions of the body defining the top opening configured to remain substantially flush with the surface when the sump drain is installed in the swimming pool or spa.

10. The sump drain of claim 9, wherein the water stop includes a horizontal shelf and a vertical wall collectively forming a gutter.

11. The sump drain of claim 9, wherein the water stop is endlessly looped about the top opening and the body defines a chamber disposed to receive water admitted through the top opening.

12. The sump drain of claim 11, wherein the chamber forms a ring-shaped structure, with a plurality of radial conduits extending between the chamber and hub.

13. The sump drain of claim 9, wherein the removable cap is no greater than about 2.5 inches in diameter, and is separate from the body.

14. The sump drain of claim 9, wherein the removable cap closes a top end of the hub.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

(1) FIG. 1 is a perspective view of a preferred embodiment circular drain assembly.

(2) FIG. 2 is a side elevation view of the preferred embodiment circular drain assembly.

(3) FIG. 3 is a top plan view of the preferred embodiment circular drain assembly.

(4) FIG. 4 is a perspective exploded view of the preferred drain assembly with the temporary plaster cover.

(5) FIG. 5 is an exploded view of the preferred drain assembly with the grid cover, and also showing the removability of the center cover.

(6) FIG. 6 is a perspective view showing the preferred drain installed into the surface of a pool with the plaster cover.

(7) FIG. 7 is a section view taken from FIG. 6.

(8) FIG. 8 is a perspective view showing the preferred drain with the grid cover installed in a pool.

(9) FIG. 9 is a section view taken from FIG. 8.

(10) FIG. 10 is an enlarged section view showing the grid cover installed and the water stop feature.

(11) FIG. 11 is an enlarged section view showing the center cover installed and again the water stop feature.

(12) FIG. 12 is a perspective view of the alternate embodiment circular drain assembly.

(13) FIG. 13 is a perspective view of the alternate drain installed in a pool.

(14) FIG. 14 is section view taken from FIG. 13.

(15) FIG. 15 is an enlarged portion of FIG. 14.

(16) FIG. 16 is an enlarged section view of the water stop feature.

DETAILED DESCRIPTION

(17) Referring to drawing FIGS. 1-11, the low profile circular drain 10 or suction outlet or sump of the preferred embodiment is disclosed. As best shown in FIGS. 1-3, the drain 10 has an annular ring-shaped body or chamber 12 although optionally the drain 10 may be other preferably rounded shapes such as oval or merely with rounded comers (not shown). The chamber 12 has an inner sidewall 14 having a diameter of about 18 inches (dimension D as labeled in FIG. 7) and outer sidewall 16 having an outside diameter of about 21 inches, and the depth of the chamber from top to bottom is about 3.5 inches. The top side of the chamber 12 is generally open, forming an annular or ring-shaped space 18 between the sidewalls 14, 16, which may be sized to receive a corresponding circular grid cover 22. The grid cover 22 may include a large number (here there are about 150) rectangular, radial slots 24. Optionally, the cover 22 may have other types of openings (not shown), most anything that allows water to pass through while stopping larger debris such as leaves.

(18) The inner sidewall 16 has multiple openings or outlet ports 26 connecting to one or more conduits or pipes 28. The conduits 28 extend radially inward to a central hub 30 that connects to the pump and filtering system 32 in the floor of the pool or spa. The hub 30 preferably has about a 2.5 inch inner diameter, and its length from the bottom of the chamber 12 to the end is about 2.5 inches. The top side of the hub 30 includes a cap 34 on which a manufacturer's logo, here ABC, may be displayed, and the cap 34 is removable for purposes of cleaning out the drain 10 should it become clogged with debris. It's held on by a pair of flat head Phillips screws 36 (FIG. 5).

(19) Next referring to FIGS. 4-12, installation of the drain 10 as well as further features may be described. FIG. 4 shows a plastering cover 38 which is temporarily placed in the chamber 12 opening 18, to keep plaster from getting into the chamber 12 when the drain 10 is being installed in the floor of a pool or spa. The plastering cover 38 preferably includes several, at least two thumb/index finger holds 40 for facilitating later removal of the plastering cover 36 once the drain 10 is embedded in the pool or spa. FIG. 5 shows the grid cover 22 which is then added, held on by eight (8) screws 36. FIG. 6 shows the drain 10 being installed in the plaster surface 42 floor of a swimming pool or spa, with the plaster 42 covering up the temporary cover 38 and the center hub cap 34. Optionally, it may also be installed vertically in a lower wall of a pool or spa (not shown). FIG. 7 shows the top side opening 18 into which the plastering cover 34 fits, along with the hub cover 34 (also see FIG. 12), being substantial flush with the plaster surface 42. FIG. 8 shows that there is a substantial amount of plaster 42, as well as the underlying gunite or shotcrete material 44, between the annular chamber 12 and the center hub 30. With the drain 10 being installed in this fashion, it offers improved structural integrity in that any load from a swimmer's foot or occupant of a hot tub will impact only a small portion of the drain 10 and tend to be absorbed by the surrounding floor or wall of the pool or spa.

(20) FIGS. 9, 10 shows the plastering cover 34 removed and replaced with the grid cover 22. As indicated in FIG. 5, the grid cover is secured in place in the top opening 18 by several Phillips head screws 36. Thus, the grid cover 22 and center cap 34 are the only parts of the drain 10 seen upon installation, and they blend into the plaster surface 42 of the floor of the pool or spa. FIG. 11 shows the cover 22 is substantially flush with the surrounding plaster 42, and as per FIG. 12 the center hub cap 34 is similarly substantially flush with the plaster 42 floor. [FIGS. 11, 12 also show water stops 50, 60 for stopping any water that intrudes between the sump 10 and plaster 42 into which the sump 10 is embedded. In the preferred embodiment the water stop 50, 60 is tray-shaped like a gutter or channel 52, 62 and extends around the sump 10 to collect water seeping into cracks between the sump 10 and the plaster 42. The water stop 50 also serves to anchor the sump 10 in the plaster 42. The gutter or channel 52 is located inboard the grid cover 22, and the same channel 52 is built in around the hub cover 34. A slightly differently configured water stop 60 is located outboard the grid cover 22, as the gutter or channel 52 is molded into the chamber body 22 adjacent to the screws 36 which attach the cover 22. Each water stop 50, 60 preferably includes a horizontal shelf 54 and a vertical wall 56, again to catch water migrating between the sump 10 and the plaster 42 in which the sump 10 is installed. The vertical wall 56 may extend above and below the horizontal shelf 54, providing an effective anchoring mechanism during sump 10 installation.

(21) Now also referring to FIGS. 13-16, a second alternate embodiment 110 is discussed. This drain 110 has a round sump body 112, and an inner leaf trapper ring 114 and an outer leaf trapper ring 116. The leaf trapper rings 114, 116 are located concentric to each other and provide a narrow, circular gap 118 (d equals about 0.875 inches wide in FIG. 16) for water to pass but small enough to prevent larger objects from passing such as leaves. As best seen in FIGS. 15, 16, the leaf trapper rings 114, 116 have upper surfaces 120, 122 which are substantially flat and approximately align with one another. This embodiment 110 may include a temporary plaster cover 36 as described above; it does not include the circular grid cover 22. The end result is a highly effective drain system flush with the surface of the pool, with plaster or other aggregate material having the same color and texture both inside and outside the concentric rings or circular grid. The drain has a nearly invisible, pleasing aesthetic appearance. The drain is a safe, VGB compliant drain, large enough to be unblockable by a single person. The drain is rugged, not susceptible to being easily damaged, and the water stop feature helps maintain the structural integrity of the surrounding plaster in the pool or spa floor for many years.

(22) While the apparatus and method have been described in detail with reference to specific embodiments thereof, it will be apparent to one skilled in the art that various changes and modifications can be made therein, without departing from the spirit and scope thereof. Thus, it is intended that the present description cover that modifications and variations of the apparatus and method provided, while it is only the appended claims and their equivalents which define the scope of the invention.