Waterway Pump Union [1-1/2" FBT x 1-1/2" FPT] (400-4230) marathonelectric A thermostat helps regulate the

A thermostat helps regulate the operating temperature in a compatible heater system

A return header is useful because it helps manage water flow through the heater and serves as one of the key structural sections of the assembly

Gate valves are useful because they provide a dedicated open-or-close control point in the plumbing line

5 kW flo thru heater for compatible Cal Spas applications

Waterway Pump Union [1-1/2" FBT x 1-1/2" FPT] (400-4230) marathonelectric A thermostat helps regulate theThe Waterway 400 4230 pump union is designed for compatible pump plumbing applications using a 1 1 2 inch female buttress thread connection and a 1 1 2 inch female pipe thread outlet. This style of union is useful where the pump must remain removable for service while the downstream plumbing requires a threaded female connection rather than a slip or spigot tailpiece. That specific connection format makes this Waterway union especially practical in