As a pool owner, you want to make sure that your pool is always in top condition. However, you may notice that your sand filter drains all the water into your pool every time you shut off the pump. This can be frustrating, especially if it means constantly having to refill your pool. In this case, you may want to consider installing a check valve in your plumbing system. But what exactly is a check valve, and where should you put it?
What is a Check Valve?
A check valve is a type of valve that only allows water to flow in one direction. This means that water can flow through the valve from the pool to the filter, but not from the filter back to the pool. Check valves are commonly used in pool plumbing systems to prevent backflow and to control the flow of water in the system.
Where Should You Put a Check Valve in Your Plumbing System?
The location of a check valve in your plumbing system can vary depending on the specific layout of your pool and equipment. In general, a check valve should be installed on the discharge side of your pump, before the filter. This will prevent water from flowing back into the pool when the pump is turned off.
Before installing a check valve, it is important to check the manufacturer's specifications for your pump and filter. Some pumps may not be designed to work with a check valve, and installing one could cause damage to the pump or reduce its effectiveness.
Is it Normal for the Sand Filter to Drain When the Pump Shuts Off?
It is not normal for a sand filter to drain into the pool when the pump is turned off. This could be a sign of a problem with the multiport valve or other parts of the plumbing system. If you have already checked the multiport valve and found nothing wrong, it may be time to call in a professional to diagnose and fix the issue.
In Conclusion
A check valve can be a valuable addition to your pool plumbing system, helping to prevent backflow and keep your pool water clean and clear. However, it is important to work with a professional to ensure that the valve is installed in the correct location and is compatible with your pump and filter. If you are concerned about your sand filter draining into your pool when the pump is turned off, contact a pool professional for assistance.