Why is the filter continuing to run at high pressure even after backwashing?
• Make sure you are following the instructions in your Hayward owner’s manual. The sand bed may be clogged with mineral deposits or other material that will not backwash away. Some calcium based chlorines and other alternative sanitizers could cause a build-up in your sand bed. You may need to change the sand. • Before you change the sand in you filter, try removing approximately 1″ of the top layer of sand, and replace with the exact amount of sand removed. This sometimes rids the sand bed of the deposits clogging the filter. • You may have to clean you filter system with a special filter cleaner, check with your Authorized Hayward dealer for proper procedures. • Check to see if there is a closed or partially closed valve on the return piping. • Your pump may be too small to provide sufficient flow for proper backwashing.
Make sure you are following the instructions in your Waterway owner’s manual. The sand bed may be clogged with mineral deposits or other material that will not backwash away. Some calcium based chlorines and other alternative sanitizers could cause a build-up in your sand bed. You may need to change the sand. Before you change the sand in you filter, try removing approximately 1″ of the top layer of sand, and replace with the exact amount of sand removed. This sometimes rids the sand bed of the deposits clogging the filter. You may have to clean you filter system with a special filter cleaner, check with your local pool/spa professional or dealer for proper procedures. Check to see if there is a closed or partially closed valve on the return piping. Your pump may be too small to provide sufficient flow for proper backwashing. Your filter will filter properly, but if your pump does not supply at least 60% of the filter’s designed flow rate, you filter will never backwash completely. Ref
