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Spa & Hot Tub Pump Unions

Spa pump unions allow for quick disconnect of and spa pump for service, repair or replacement. Pump unions are especially important in spa plumbing due to the tight spaces for housing spa equipment. Pump unions are different in size and threads from most spa heater unions. Spa pump unions are available in many sizes, 3/4", 1", 1.5", 2", 2.5", with either a SlipxSlip PVC pipe connection or a ribbed hose barb for hose connections.

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Complete spa pump unions include the Lock Ring Nut, Tail piece and O-ring. The female buttress thread lock ring nut attaches to male threads on the inlet/outlet ports of the pump. Pump unions are not spa 'plumbing unions', used elsewhere in spa plumbing, and they are not 'heater unions', which use different gaskets, but these are used on spa pumps only, suction and discharge ports.

Note that 1.0" pump union nuts fit (male) pump threads with a 2.0" OD. 1.5" pump unions fit pump threads that measure 2.5" OD. 2.0" pump unions fit pump threads with a 3.0" OD, and 2.5" pump unions fit 3.5" pump threads.

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