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The Complete Guide To Pool And Spa Plumbing Repairs

To understand the basic plumbing system of a pool or spa, you must follow the path of the water. The water from the pool or spa, not both at the same time, enters the equipment system through a main drain on the floor, through a surface skimmer, or through a combination of both main drain and skimmer.

The water travels to a three-port valve (if there is no spa, there will be no such valve) and into the pump, which is driven by the attached motor. From the pump, the water travels through a filter, then to the heater, and back through three-port valves to the pool or spa return lines.

The three-port valve is often used when a pool and spa share one filter, heater and pump. In this situation, the water is alternately diverted to the pool or spa. Spas use the...

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