Suction loss is due to one or more of the following;
These account for 99% of suction loss problems, it may require a bit of detective work to find the problem.
SOURCE: no suction from hayward variflow pro series sand filter
Try these tips. I am guessing that one of these is the reason that your pool filter is not working properly. If you try these suggestions and they don't work, let me know and I will trouble shoot with you again.
1. Check skimmer and pump strainer baskets for debris.
2. Check for restrictions in intake and discharge lines.
3. Check for air leak in intake line (indicated by bubbles returning to pool.
4. Backwash your filter.
5. Be sure Vari-Flo valve is set on “Filter” position.
SOURCE: pool filter problem
You have a problem ...
Can you see the little tube that bleeds air out of the return pipe? If not ... see if you can find it and get it to the top of the filter.
Still have sand? You may have a cracked lateral ... remove the sand and check all the laterals. Replace any that are broken.
When you refill the sand ... be sure to put water in first to soften the beating the laterals take from the falling sand.
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