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Luxe Prestige Chronicle

pool check valve

Author

Sophia Aguilar

Updated on June 25, 2026

The check valve must be installed at the outlet of the pump and in front of the outlet control valve for maintenance. Generally, the first outlet of the pump is the soft connection (shock absorber), the next is the check valve, and then the block valve.

Do I need a check valve before my pool pump?

Without a check valve to stop backward flow, the water in the piping would be suck back down when the pump is shut off. The check valve should be installed in the pipe leading up to the solar panels.

Why is my pool losing water when the pump is off?

Pool Is Losing Water When the Pump Is Off

If you’ve turned off your pump system for a day and the pool level is dropping more than 1/4–1/2” per day, you might have a pool leak. The leak is likely somewhere in the structure of the pool or on the suction side of the pool pumping system.

Do you need a backflow preventer for a pool?

Backflow preventers are an important component to your backyard sprinkling system. Without these, municipality drinking water would become contaminated.

Does a check valve go before or after a pump?

On booster pump applications, a check valve can be placed on the suction or discharge of a centrifugal pump. If an additional check valve is required, it should be placed after the pressure tank to allow the pump and discharge pipe to remain pressurized.

Why does my pool lose water overnight?

If your pool lost water overnight and it is more than the quarter-inch due to evaporation, you probably have a leak. Evaporation accounts for a minor amount of water lost each day. Losing a half-inch or more overnight indicates a problem.

Can a pool check valve be installed vertically?

Check valve can be installed in horizontal or vertical piping runs, with the flow running upward. Mounting for vertical installations is critical.

Is a check valve the same as a backflow preventer?

A backflow preventer is used in high-risk scenarios and is designed to fully protect potable water with its fail-safe design, whereas a check valve is used in low-risk situations and stops backward water flow but lacks the same fail-safe components.

When should you use a check valve?

Due to how check valves function, they are typically used for one of four different reasons in a variety of applications:
To protect equipment downstream form backflow damage.To prevent contamination due to reverse flow.To prevent siphoning.To keep a vacuum seal.

Should check valves be installed vertically or horizontally?

When installing a check valve, a horizontal line is always preferred, because it takes gravity out of the equation.

Do I need a check valve on my chlorinator?

A check valve for a chlorinator is used to prevent chlorine gas from entering into the pool equipment. ALL CHLORINATORS SHOULD HAVE A CHECK VALVE ASSEMBLY.

What is a spring check valve?

Spring Check Valve. Valves are versatile devices used for controlling the flow of liquids or gases. They play an important role in countless piping and process systems, typically serving to regulate flow and pressure, start or stop flow, or prevent the occurrence of back flow within a system.

Where do most pool leaks occur?

Most pool leaks are not in the underground plumbing, although it’s every pool owner’s worst fear, a large backhoe coming in and ripping up the pool deck. It does happen occasionally, that a leak occurs at a pipe connector under the pool deck, or beneath the skimmer, but repair rarely involves a backhoe.

How much water should pool lose per day?

If pool owners or maintenance workers are constantly filling up the pool, there may be a leak. On average, swimming pools lose about a quarter of an inch of water each day, yet variations in wind intensity, humidity and sunlight can drastically change water loss rates.