Why does the filter housing leak?

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Old 02-19-21, 09:14 AM
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Why does the filter housing leak?

I know this sounds like a no-brainer, but...

I have a Hayward C-250 filter for my water feature. After I clean the filter I clean the gasket and screw down the lid. I turn it on and no leaks. The next morning , I run the pump and the filter housing leaks from the lid.

The gasket was only replaced a few months ago. Why would it not leak one day and then leak the next? Is it a pressure issue? Bad gasket? Iím scratching my head on this one. Thanks.
 
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Old 02-19-21, 11:24 AM
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Look at the area where the O ring sits and where it seals against, both housing and lid, for scratches or gouges that might prevent it from sealing. If you don't find anything I would start by getting another O ring.
 
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Old 02-19-21, 11:30 AM
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The seal looked good to me.

I spoke to Hayward today and they suggested I use a special lube on the o-ring called Magic Lube. I had never heard of that, so I will be ordering some to see if it helps.
 
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Old 02-19-21, 12:34 PM
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For my whole house filters the o-rings have to be coated every time the element is replaced or they will have a tendency to leak.

O-rings work by the internal pressure pushing the o-ring into the voids to seal.

All you need is plumbers silicon grease, which is probably what they are selling but at a higher cost!
 
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Old 02-19-21, 12:37 PM
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whole house filters the o-rings have to be coated every time the element is replaced
Petroleum jelly works for me.
 
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Old 02-19-21, 01:13 PM
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I've used petroleum jelly and dielectric grease but I prefer Super Lube Silicone. If you use grease make sure everything is clean as dirt will readily stick to the grease.
 
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Old 02-20-21, 10:53 AM
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You dont want to use any kind of lube that has petroleum products in it, it will break down the o-ring material!
 
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Old 02-20-21, 11:43 AM
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You dont want to use any kind of lube that has petroleum products in it, it will break down the o-ring material!
In my case it was recommended by the manufacturer of the filter housing. Installed 40 years ago and still going strong.
 
 

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