How do you stop sand from coming into the pool after have changed and cleaned backwashed it?

There are a few things you can do to stop sand from coming into the pool after changing and cleaning the sand filter.

1. Make sure the sand filter is properly sized for your pool. A sand filter that is too small will not be able to effectively filter out the sand, and some of it will escape back into the pool.

2. Use the correct type of sand in the filter. Some types of sand are more prone to clumping and clogging than others, which can lead to sand escaping into the pool. Choose a sand that is specifically designed for pool filters.

3. Rinse the sand filter thoroughly before using it. This will help to remove any loose sand particles that could escape into the pool.

4. Backwash the sand filter regularly. Backwashing the filter helps to remove dirt, debris, and sand that has accumulated in the filter.

5. You may also want to use a flocculant in combination with the sand filter. Flocculants help to bind sand particles together and make them easier for the sand filter to remove.

6. If you have a sand filter with a multi-port valve, make sure the valve is set to the correct setting when filtering. If the valve is not set correctly, water will not properly pass through the filter, which could lead to sand escaping back into the pool.

7. Check the sand filter pressure gauge. If the pressure is too high, it could indicate that the filter is clogged with sand or debris, which could lead to sand escaping into the pool.

8. If the sand is still getting into the pool, you may need to replace the sand in the filter.

Following these tips can help you to stop sand from coming into the pool after changing and cleaning the sand filter.