Do I need a check valve on my spa?
The most common use for a check valve is to hold the water in the pump when the motor shuts off. When doing so however, you will need to install check valves on all vertical suction pipes, unless one pipe normally has a closed valve, like a spa drain pipe.
What does a check valve do on a hot tub?
Spa check valves are used to keep water from flowing backwards through certain pipes. Check valves are also called one-way flow valves, because that’s what they do, allow water to travel in only one direction.
What is a union check valve?
PVC true union ball check valves are used in systems that allow water to flow in one direction and also prevent backflow in the line. The union ends on the valves allow for maintenance of the valve itself, O-rings, and seals.
Do you need check valve before chlorinator?
CHLORINATION – Most pools have an automatic chlorination device like a chlorinator or a salt chlorination generator. To prevent water from backing up thru the system after the pump is shut off, a check valve must be installed just before the chlorination device – on the side going to your filter of heater.
Why is my spa draining when I turn it off?
The cause is what is known as a check valve. This valve uses a spring (or floater ball) inside it to allow the water to flow in only one direction. When the pump shuts off, water cannot flow back through the pool returns, which prevents the spa from equalizing and allow it to remain full.
What is CPVC check valve?
CPVC check valves are used in systems to prevent backflow into the system once the system has been turned off for repair or maintenance. These valves range in size from ½” up to 4” and come with socket or threaded options. CPVC check valves are pressure tested at 150 PSI and will handle temperatures up to 200 degrees.
Why is my spa overflowing?
For the spa to overflow, all of the water from the pump must be going to the spa, but the pump must be drawing water from the pool, or perhaps both the pool and spa. That means more water going to the spa than is taken from the spa, so it overflows.