Question about Hayward SAND FILTER, PRO SERIES
The filter backwashes and circulates finr but when you connect the vacumn it is not getting any suction
The filter is most likely not the issue at all.
When you lose vacuum pressure and see bubbles the problem is usually air getting into the line killing the prime. The most common place that air gets into the line is from the strainer cover on the pump. The clear lid on the front of the pump has an o-ring that is probably due for replacement.
With a bad o-ring it's easier for the pump to draw air through the lid then water through 20+ feet of vac hose. Replace the o-ring, make sure it is lubed well with a non petrol based grease.
The only other issue that may cause this is a cracked or seriously warped strainer lid, which should be easy to recognize once it is removed to replace the o-ring.
Once this is done you should be fine.
Posted on Oct 08, 2009
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Posted on Jan 02, 2017
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