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Manufactured in the U.S.A.

Why is the filter continuing to run at high pressure even after 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. Refer to the label on your filter for flow rate requirements. It may be necessary to upgrade the pump or downgrade the filter.

Your pump may also be exceeding the maximum allowed flow rate of you filter causing excessive backpressure. Check your Waterway filter owners guide or the operations label on your filter for the maximum allowed flow rate. You may have to downsize the impeller or pump to a lower horsepower or change the filter for one that will accommodate the pump’s flow rate. If allowed to continue, a pump that exceeds the recommended flow rate of a sand filter could cause the sand bed to channel (small channels in the sand that allow debris to pass unfiltered). This would cause debris to bypass the filter.

Posted in: Sand Filters

Posted by: admin on June 23, 2011 @ 6:41 pm
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