Waterway Pump Union [2-1/2" FBT x 2-1/2" Slip] (400-6010) leaftraps A temperature sensor is useful

A temperature sensor is useful because it helps the heater monitor operating temperature accurately

The 25141-170 is a practical service part when a compatible Hayward SP1090 style skimmer needs a weir to restore dependable surface-skimming performance

This model is especially useful when the original heater has stopped heating effectively

Alternate-action air switches are useful because they change and hold state with each activation

For smaller compatible air control assemblies

Waterway Pump Union [2-1/2" FBT x 2-1/2" Slip] (400-6010) leaftraps A temperature sensor is usefulThe Waterway 400 6010 pump union is designed for compatible pump plumbing applications using a 2 1 2 inch female buttress thread connection and a 2 1 2 inch slip outlet. A pump union in this size is especially useful because it creates a serviceable connection point while matching larger plumbing lines found in higher capacity systems. Using the correct Waterway union helps preserve fit and makes future maintenance more manageable, since the pump can