It helps visualize the water’s route when leaving and reentering the pool while showing the correct position of the valves and non-return valves. Likewise, leaky plumbing can lead to huge water and heating bills each month.Ī filtration diagram shows the hydraulic design of a swimming pool. Too much or inadequate water in the pool can damage the expensive pool equipment and saddle you with expensive repair bills. Besides keeping the water clean to let you enjoy the swim, the plumbing in a shared pool maintains an optimal water level. The plumbing in a swimming pool or spa combination continuously cycles the water through the filter to remove dirt and debris. Although largely ignored, basic pool plumbing keeps the water clean, sanitary, and safe. Often overlooked, the plumbing network in a swimming pool or spa combo is quickly forgotten until it malfunctions. Do I Need a Check Valve in My Pool Plumbing?.How Do You Install PVC Pipe for a Pool?.What Are the Two Drains at the Bottom of My Pool?.