The present application relates to a water system that includes a prefabricated fitting tee for use with a water heater. The prefabricated fitting tee includes a fitting tee body that has a first port, a second port, and a third port. The first and third ports can be aligned along a main axis and the second port can be aligned along an axis angled relative to the main axis. The fitting tee body defines an interior passageway that is in fluid communication with the first, second, and third ports. One of the first and second ports is configured for connecting to a water inlet conduit for supplying water from an external source, the other one of the first and second ports is configured for connecting to a pressure relief or pressure absorption mechanism. The prefabricated fitting tee does not include a check valve for preventing flow from the first port to the third port and no check valve for preventing flow from the second port to the third port. A swivel nut can be rotatably mounted at the third port of the prefabricated fitting tee to provide an interconnection to the water heater. When the swivel nut is in a first condition, the swivel nut allows the prefabricated fitting tee to be rotated relative to the water heater about the main axis to allow a rotational orientation of the second port to be established. When the swivel nut is in a second condition, the swivel nut clamps the prefabricated fitting tee in the established rotational orientation.

An expansion tank includes two half-shells coupled to each other, an inner flexible membrane suited to divide the inside of the casing in two compartments, a counter cap made of a thermoplastic material, a pipe fitting suited to provide a connection and having a first tubular portion and a second portion in the shape of a flat ring that are made of a thermoplastic material, wherein the second ring-shaped portion is joined to the counter cap at the level of an opening in the tank.

Exemplary embodiments are provided of combined heater and accumulator assemblies. In an exemplary embodiment, an assembly generally includes an enclosure including a first portion, a second portion, and a divider between the first and second portions. The assembly also includes an inlet through which coolant may enter an interior of the second portion, and an outlet through which the coolant may exit the interior of the second portion. The assembly further includes a heat source operable for supplying heat for heating the coolant within the interior of the second portion.

An expansion tank wall mount bracket apparatus capable of being mounted in multiple assembly configurations and supporting multiple expansion tanks.

A pressure compensation and mixing device includes: a mixing unit configured to mix a fluid guided in the mixing unit; and a pressure compensation unit configured to restrict pressure rising in the fluid. The mixing and pressure compensation units are integrated in a container unit. The mixing unit has a mixing volume. The pressure compensation unit has a pressure compensation volume. The mixing and pressure compensation volumes adjoin each other and are separated from each other at least partially by a common separating wall. The pressure compensation unit is arranged inside the mixing unit. The mixing unit includes: an inlet tangentially arranged on the mixing volume such that a fluid let in through the inlet flows in tangentially into the mixing volume; and an outlet axially arranged on the mixing volume such that a fluid let out through the outlet flows out of the mixing volume axially.

Disclosed is an expansion tank having an internal cavity separated by a flexible diaphragm to form an upper pressurized gas portion and a lower pressurized fluid portion, and an indicator positioned at an upper part of the expansion tank in communication with the contents of the upper pressurized gas portion. The indicator is configured so as to display a first color if the operating conditions are normal in the pressurized gas portion, and a second color if the amount of moisture detected in the pressurized gas portion greater than or equal to a predetermined amount. Further disclosed is a method for detecting whether there is an excessive amount of moisture in a pressurized gas portion of an expansion tank by allowing pressurized gas from the pressurized gas portion to come into contact with the indicator, and viewing the color displayed by the indicator. As such, the tank can be simply visually inspected to determine whether there is a potential failure in the tank.

Disclosed is an expansion tank having an internal cavity separated by a flexible diaphragm to form an upper pressurized gas portion and a lower pressurized fluid portion, and an indicator positioned at an upper part of the expansion tank in communication with the contents of the upper pressurized gas portion. The indicator is configured so as to display a first color if the operating conditions arc normal in the pressurized gas portion, and a second color if the amount of moisture detected in the pressurized gas portion greater than or equal to a predetermined amount. Further disclosed is a method for detecting whether there is an excessive amount of moisture in a pressurized gas portion of an expansion tank by allowing pressurized gas from the pressurized gas portion to come into contact with the indicator, and viewing the color displayed by the indicator. As such, the tank can be simply visually inspected to determine whether there is a potential failure in the tank.

A hydronic system and method of use that will maintain normal system operating pressure while also reliably detecting even very small fluid losses in any closed loop fluid heat transfer system is described. The system includes a controller in communication with one or more pressure sensors and optionally one or more temperature sensors that provides one or more notifications when the pressure drops below predetermined levels.

An apparatus for supporting s a thermal or hydronic expansion tank relative to a hot water heater comprises a rigid bracket adapted to be secured to the tank and to the hot water heater. The bracket provides support for the tank adjacent to the pipe nipple. Means are provided for interconnecting the tank and the bracket for securing the tank to the bracket. In one aspect, the bracket comprises a base, and an end wall at each end of the base. The end walls adapted for engaging and supporting the tank, wherein one of the end walls engages the tank adjacent the pipe nipple and the other of the end walls engages the tank past the midpoint of the length of the tank from the base.

An insulating shell designed to fit a variety of thermal expansion tanks which provides substantial insulation. The insulation shell includes a first half shell, a second half shell, and an interlocking mechanism. The first half shell and the second half shell join together to form an enclosed shell with a hollow interior. The first half shell and the second half shell each include a main body, a central cavity, and a hole. The main body provides the thermal insulation. The central cavity laterally traverses into the main body through a planar mating surface and receives the tank. The hole traverses into the main body from an external surface to an internal surface and received associated plumbing of the tank. The interlocking mechanism includes a first engaging element and a second engaging element, which are used to attach the first half shell and the second half shell together.