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 happens when a check valve goes bad?
Usually when a check valve fails
the water will run backwards after the pump shuts off
, and the pump will start again even when no one is using water. But if you have two or more check valves, the lower one can be masking the problem of a bad upper check.
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.
How does SPA check valve work?
This device in your pool and spa plumbing allows water to flow into the spa and overflow into the pool, but it
stops the spa water from returning
to the pool when the pump is turned off. … This involves locating the check valve, which in most instances is aboveground, near the pool pump.
Does a check valve reduce water pressure?
Check valves are
designed to prevent water flowing in one direction while moving somewhat freely in the other direction
. … In yet another style of check valve, water pressure compresses a spring-loaded disc in the fluid stream, pushing the disc back into the valve body and opening a path for the water to flow around it.
Where should a check valve be installed?
Sump pump check valves should be installed
close to the floor after the pump
, as shown by arrow #1. This will reduce the amount of water that drains back to the pump after each cycle.
How often should a check valve be replaced?
While typical component lifespans are application specific, manufacturers suggest metal and plastic check valves should be replace
every 5-7 years
whereas check valves manufactured from rubber may remain fully serviceable for up to 35-50 years.
When should a check valve be replaced?
Look for signs of corrosion, rust or mineral build-up. Replace the valve if there are
extensive leaks or worn/broken pieces
.
Open & close the valves
to make sure they aren’t seizing. Inspect pressure & temperature of fluid flowing through.
How long does a check valve last?
Now for the verdict: in most cases, a check valve will last
approximately 10 years
.
Does a check valve go before or after a 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. The check valve slamming shut from a full open position when the pump is cycling repeatedly is the main cause of check valve failure.
What is spa make up valve?
The “Spa Make-up” valve in that diagram
causes the spa spillover to run at a low flow rate any time the pump is on
. This is optional, but very handy when you don’t have automation, as you don’t want to leave the spa too long without circulation.
Why is my backwash valve leaking?
Sometimes you will see water leaking out where the valve shaft goes into the body of the valve. This indicates
a bad shaft o-ring on the valve
. … If water keeps trickling into the backwash line, even 15 minutes after the valve has been put on filter, then there is probably a bad gasket or o-ring on the valve.
How do I know if my check valve is working?
Stand near the valve
and have an assistant turn the water supply on for five seconds before quickly shutting it off again. Put your hand on the valve and place your ear near to it. If you feel or hear any water running, it is a sign that the valve’s seal is leaking.
Can a check valve get stuck closed?
Debris in pipeline —
Debris in the piping can get lodged in the check valve
, causing it to remain stuck in the open or closed position. … This can cause pieces of the valve to break or become dislodged, causing more debris to flow in the downstream direction.
Can a check valve be submerged?
So with your specific application, you should know how much back pressure the check valve will need to withstand. Will the valve be installed in a submerged condition? If the valve is installed in a submerged condition, this means
that there will always be back pressure on the valve
.
