The invention relates to a conduit insert (1) comprising an adapter (10) having a liquid inlet (11) and a liquid outlet (12) and between them a chamber (13) having a first planar end wall into which the liquid inlet (11) opens, and an opposite second planar end wall, which is parallel to the first end wall and into which the liquid outlet (12) opens, and an access opening (16) extending from the first planar end wall of the chamber (13) to the second planar end wall of the chamber. A conduit access means (20) is slidable into and extractable out of the chamber (13) via the access opening (16) and has a first planar end face and an opposite second planar end face which is parallel to the first planar end face. The planar end faces are arranged to by means of respective elastic annular seals (27) round the liquid inlet (11) and the liquid outlet (12), respectively, in the chamber (13) to abut tightly against a respective planar end wall, wherein the elastic annular seals are (27) are permanently arranged in annular grooves (29) to enable insertion and extraction of the conduit access means (20) while pressurized liquid flows into the adapter (10) and its chamber (13) via the liquid inlet (11).

A backwater flow detection device for detecting backwater flow between a building and a sewer conduit using air pressure detection in air pockets in the sewer conduit. The backwater flood detection device detects backwater flow events including backflow events from a sewer line as well as wastewater blockage events that can result in wastewater backflow into a building. The water detection sensor allows the homeowner or building manager to be warned when there is an issue with backwater flow in or near the building, and also with the backwater valve.

A backflow prevention assembly includes a body forming two buckets, wherein flow passes through the body from an inlet to an outlet along an axis and consecutively through each of the buckets. A single zone test cover encloses a first of the buckets to form a single zone chamber. A dual zone test cover encloses a second of the buckets with a dual zone cartridge assembly therein. The dual zone test cover has two test cocks. The dual zone cartridge assembly includes a frame having a valve seat, wherein the frame includes a lumen providing fluid communication from a dual zone chamber upstream of the valve seat to a first of the two test cocks of the dual zone test cover, and wherein the second of the two test cocks of the dual zone test cover is in fluid communication with the dual zone chamber downstream of the valve seat.

A system (15) regulates a temperature of fluid in a sector of a fluid distribution network, including a feed line (11) transporting fluid from a thermal energy source (3) to a thermal energy consumer (7) within the sector and a return line (13) transporting fluid back. A bypass line (17) connects the return line to the feed line, mixing fluid from the return line into the feed line. A pump is at the bypass line. A temperature sensor determines a temperature of fluid in the feed line downstream of the bypass line. A pressure sensor determines an uncontrolled pressure difference between the feed line and the return line, or an uncontrolled pressure difference correlated therewith. A control unit controls the speed of the pump with a closed-loop control for achieving a target feed line temperature based on the determined temperature, and a feed-forward control compensating fluctuations of the pressure difference.

Assembly (10) for measuring a leakage in a drinking water supply system, with a backflow preventer (12), wherein the backflow preventer (12) is opened if there is a pressure drop caused by drinking water consumption downstream of the backflow preventer (12) as viewed in a flow direction of the drinking water, and wherein the backflow preventer (12) is closed if there is no pressure drop caused by drinking water consumption downstream of the backflow preventer (12), as viewed in the flow direction of the drinking water, with a volume flow meter (13) connected in parallel to the backflow preventer (12) and via which, if the backflow preventer (12) is closed, a leakage flow of drinking water caused by a leakage in the drinking water supply system downstream of the backflow preventer (12) can be routed, wherein the volume flow meter (13) is integrated into a bypass (14) to the backflow preventer (12).

A check valve for a backflow prevention assembly includes a linkage with a platform having a proximal end and a distal end and a first coupling member supported by the platform for engaging a bias assembly. A stop protrudes from the proximal end of the platform to engage a frame of the check valve for limiting travel of the platform. A branch depends from the proximal end of the platform, the branch having a hinge pin configured to nest in a slot defined by check valve. A second coupling member depends from the distal end of the platform for engaging a valve member.

A pumping unit operable to pump water has a longitudinal pumping unit axis. A pump shaft engages shaft bearings in a pump shaft housing. A drain conduit includes a drain conduit inlet segment, a drain conduit ascending segment, and a drain conduit terminal segment. The drain conduit inlet segment has a longitudinal drain conduit axis disposed at an obtuse angle to the longitudinal pumping unit axis. The drain conduit ascending segment is disposed at an obtuse angle to the drain conduit inlet segment. The drain conduit terminal segment is disposed at an obtuse angle with respect to the drain conduit ascending segment and is disposed at a level above the shaft bearing. Accordingly, backflow water flowing through the drain conduit terminal segment, the drain conduit ascending segment and the drain conduit inlet segment, respectively, flows into the pump shaft housing to contact and cool the shaft bearing.

An apparatus and method for valve cartridge extraction from a valve assembly, wherein the assembly includes a valve member body, a cartridge, and a valve cartridge extraction (VCE) tool comprising at least one pin disposed on the upper surface of the VCE tool. During cartridge removal, the VCE tool is uncoupled from the valve member body and is coupled to the cartridge with the at least one pin. The cartridge is rotated with the coupled VCE tool to assist in cartridge removal. The valve assembly may also include a hood covering the VCE tool.

A vacuum breaker valve assembly includes valve body defining a hollow main chamber, which communicates with a plenum opening, an inlet opening, and an outlet opening. A valve cap is attached to the valve body and defines a plenum, which communicates with the plenum opening, and a vent opening communicating with atmosphere. A drainage plug is connected to the vent opening, and an overflow conduit defines an elongated flexible hollow tube having one end connected to the drainage plug. A cap fixture is connected to the valve cap and defines a countersunk shallow recess that receives therein a thin label that is adhesively attached to the cap fixture.

A backflow preventer for preventing a reverse flow of water in a plumbing system including a body having an inlet and an outlet. The body forms an intermediate zone between the inlet and outlet. An inlet check valve prevents the reverse flow of water from the intermediate zone through the inlet. An outlet check valve prevents the flow of water from the outlet into the intermediate zone. An inlet pressure sensor, an intermediate pressure sensor and an outlet pressure sensor provide readings for the respective zones. A controller monitors a pressure differential between the outlet pressure zone and the intermediate pressure zone to compare the pressure differential to a pre-set range. The controller generates a warning/error message when the pressure differential is outside the pre-set range. The controller can also monitor an inlet pressure in the inlet zone to generate a message if the inlet pressure varies inappropriately.