A freeze protection system is provided that includes a first valve configured to be coupled with an inlet of a water heater, such as a tankless water heater; a second valve configured to be coupled with an outlet of the water heater; and a valve actuator configured to automatically actuate the first valve and the second valve to permit water to drain from the water heater when (1) electric power is lost to the water heater, and (2) a temperature of a fluid in or around the water heater is less than or equal to a predetermined low temperature threshold.

The present disclosure provides a hot water storage tank support system and a water heater pan. In one implementation, the hot water tank support system comprises a water heat pan having a bottom wall, an outer wall extending upwardly from and substantially surrounding the bottom wall, and at least one elevated support feature, and at least one substantially rigid supplemental support component. The at least one elevated support feature is configured to support the hot water storage tank, and the at least one elevated support feature includes at least one supplemental support cavity configured to receive the at least one supplemental support component. In some implementations, the supplemental support component(s) may be insertable and removable from the water heater pan.

A modified valve (10) comprises a body (11) having first (18), second (19), third (21) and fourth (23) connectors. The first (18) and second connectors (19) are each adapted for connection to a respective element of a fluid circulation system. A ball valve member (30) is enclosed internally within the body (11) and is arranged for selective rotation between a range of positions. First (31), second (32) and third (33) apertures are provided in the ball valve member (30) and arranged in a configuration so as selectively to permit fluid communication between at least two of said first (18), second (19) and third (21) connectors in each of said range of positions of the ball valve member (30). The ball valve member (30) further comprises a conduit (35) to permit fluid communication between said fourth connector (23) and at least two of said first (18), second (19) and third (21) connectors in each of said range of positions of the ball valve member (30).

The present invention relates to a connector (100) for a water system. The connector comprises an inlet connector (105), a connector body and an outlet connector (120) arranged in sequence. The connector body is open-sided so as to form a tundish having an open air gap between the inlet and outlet connectors (105, 120), through which water can fall in use. The connector (100) further comprises a sensor for detecting the presence of water within the connector body.

An isolation mounting arm for use with an expansion tank has a passageway with a first end portion, a second end portion, and a medial portion located between the first end portion and the second end portion with the drain port located at the terminal end of the second end portion. A first tee is located in the first end portion with oppositely disposed first and second ports. A second tee is located in the second end portion, with oppositely disposed fourth and fifth ports. A first valve member is coupled to the first port, a second valve member is coupled to the second port, and a third valve member is located adjacent to the drain port. An expansion tank is coupled to either the fourth port or the fifth port with a plug coupled to the other port.

Refilling device for a hydronic heating system, having a monolithic housing providing an inlet port, an outlet port, a middle section providing a flow channel for water extending between the inlet port and the outlet port and a connection socket for a softening and/or demineralization cartridge, having an inlet shut-off-valve accommodated within said monolithic housing downstream of said inlet port, having an automatically actuated outlet shut-off-valve accommodated within said monolithic housing upstream of said outlet port, having a system separator with backflow preventers, a conductivity or TDS sensor and a flow meter accommodated within said monolithic housing, and having a controller mounted to said monolithic housing, wherein the controller receives signals from the conductivity or TDS sensor and from the flow meter, wherein the controller processes said signals received from said sensors to automatically control the operation of the refilling device.

A heat pump for a pool or spa may include a human-machine interface (HMI). The HMI of the heat pump may be movable relative to a housing or body of the heat pump such that regardless of the location and orientation of the installation of the body of the heat pump, the HMI may be positioned so that it is accessible to a user. A heat pump may additionally or alternatively include means for managing condensate created by operation of said heat pump.

A tankless water heater (TWH) isolation valve includes a valve body having a plug valve port, a TWH port, a water distribution system port and a drain port. A plug valve includes at least one plug seal. The plug valve is controlled by a rotatable plug valve handle. The plug valve is disposed through the plug valve port and within the valve body. The rotatable plug valve handle includes a first plug valve handle position and a different rotated second plug valve handle position. In a normal operating mode in the first plug valve handle position, the TWH port is fluidly coupled to both of the drain port and the water system distribution port. In a drain mode, the TWH port is fluidly coupled to the drain port, and the water system distribution port is closed to the TWH port as blocked by the plug seal.

An isolation valve assembly comprises a valve body defining a first fluid port and a second fluid port opposing the first fluid port and at least one drain port disposed between the first fluid port and the second fluid port, an isolation valve disposed within the valve body and a handle operatively coupled to the isolation valve. The handle is movable to cause corresponding movement of the isolation valve between a first normal position where the isolation valve fluidly couples the first fluid port and the second fluid port, and a second drain position where the isolation valve fluidly couples the first fluid port and the at least one drain port and isolates the second fluid port.

A filling loop device for a pressurized heating system comprising means defining a fluid passage having, an inlet port connectable to a fluid supply and an outlet port connectable to a heating system fluid circuit; and a dead man valve interposed in the passage between the inlet port and the outlet port, said dead man valve biased to a normally closed condition to shut off fluid flow through the channel in either direction when unattended, and manually operable to an open condition to permit fluid to flow from the inlet port to the outlet port. Also provided is a method of charging a pressurized boiler and heating circuit.