Abstract: A header for a heat exchanger orients the position of an inlet port at an angle offset from the position of the outlet port on the header body in order to simplify the plumbing of the header within a system. In one implementation of a header for a heat exchanger, the header forms a header cavity defined by an external wall and which is separated into an inlet chamber and an outlet chamber by a dividing wall. An inlet port is defined within the external wall and is in fluid communication with the inlet chamber. Similarly, an outlet port is defined within the external wall and is in fluid communication with the outlet chamber. The inlet port is oriented on the external wall at an offset angle with respect to a position of the outlet port.

Abstract: Disclosed are systems and devices for controlling the amount of water passing through a heat exchanger and the amount of water that by-passes the heater without passing through the heat exchanger. In some embodiments, the system includes a by-pass valve assembly having means for sensing a time-varying characteristic of fluid adjacent the inlet, means for sensing a time-varying characteristic of fluid adjacent the outlet, and a valve that alters the amount of fluid by-passing the fluid heater in response to differences in the time-varying characteristic of fluid adjacent the inlet and fluid adjacent the outlet.

Abstract: A header for a heat exchanger orients the position of an inlet port at an angle offset from the position of the outlet port on the header body in order to simplify the plumbing of the header within a system. In one implementation of a header for a heat exchanger, the header forms a header cavity defined by an external wall and which is separated into an inlet chamber and an outlet chamber by a dividing wall. An inlet port is defined within the external wall and is in fluid communication with the inlet chamber. Similarly, an outlet port is defined within the external wall and is in fluid communication with the outlet chamber. The inlet port is oriented on the external wall at an offset angle with respect to a position of the outlet port.

Abstract: A pool/spa water treatment system may include a pump and a pool filter. The pump may include a pump inlet and a pump outlet. The pump inlet and outlet may be aligned on a first axis or within a first vertical plane. The pool filter may be offset a select transverse distance from the pump. The pool filter may include a pool filter inlet in fluid communication with the pump outlet. The pool filter inlet and the pump outlet may be aligned on a second axis or within a second vertical plane that is transverse to the first axis or plane. The pool/spa water treatment system may further include a heater. The heater may include a heater inlet in fluid communication with the pool filter outlet. The heater inlet may be aligned with the pool filter outlet within the second plane.

Abstract: Disclosed are systems and devices for controlling the amount of water passing through a heat exchanger and the amount of water that by-passes the heater without passing through the heat exchanger. In some embodiments, the system includes a by-pass valve assembly having means for sensing a time-varying characteristic of fluid adjacent the inlet, means for sensing a time-varying characteristic of fluid adjacent the outlet, and a valve that alters the amount of fluid by-passing the fluid heater in response to differences in the time-varying characteristic of fluid adjacent the inlet and fluid adjacent the outlet.

Abstract: A pool/spa water treatment system may include a pump and a pool filter. The pump may include a pump inlet and a pump outlet. The pump inlet and outlet may be aligned on a first axis or within a first vertical plane. The pool filter may be offset a select transverse distance from the pump. The pool filter may include a pool filter inlet in fluid communication with the pump outlet. The pool filter inlet and the pump outlet may be aligned on a second axis or within a second vertical plane that is transverse to the first axis or plane. The pool/spa water treatment system may further include a heater. The heater may include a heater inlet in fluid communication with the pool filter outlet. The heater inlet may be aligned with the pool filter outlet within the second plane.

Abstract: A pool/spa water treatment system may include a pump and a pool filter. The pump may include a pump inlet and a pump outlet. The pump inlet and outlet may be aligned on a first axis or within a first vertical plane. The pool filter may be offset a select transverse distance from the pump. The pool filter may include a pool filter inlet in fluid communication with the pump outlet. The pool filter inlet and the pump outlet may be aligned on a second axis or within a second vertical plane that is transverse to the first axis or plane. The pool/spa water treatment system may further include a heater. The heater may include a heater inlet in fluid communication with the pool filter outlet. The heater inlet may be aligned with the pool filter outlet within the second plane.

Abstract: A header for a heat exchanger orients the position of an inlet port at an angle offset from the position of the outlet port on the header body in order to simplify the plumbing of the header within a system. In one implementation of a header for a heat exchanger, the header forms a header cavity defined by an external wall and which is separated into an inlet chamber and an outlet chamber by a dividing wall. An inlet port is defined within the external wall and is in fluid communication with the inlet chamber. Similarly, an outlet port is defined within the external wall and is in fluid communication with the outlet chamber. The inlet port is oriented on the external wall at an offset angle with respect to a position of the outlet port.

Abstract: A pool/spa water treatment system may include a pump and a pool filter. The pump may include a pump inlet and a pump outlet. The pump inlet and outlet may be aligned on a first axis or within a first vertical plane. The pool filter may be offset a select transverse distance from the pump. The pool filter may include a pool filter inlet in fluid communication with the pump outlet. The pool filter inlet and the pump outlet may be aligned on a second axis or within a second vertical plane that is transverse to the first axis or plane. The pool/spa water treatment system may further include a heater. The heater may include a heater inlet in fluid communication with the pool filter outlet. The heater inlet may be aligned with the pool filter outlet within the second plane.