Lacronite pump - drain plug won’t tighten

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E

essayer

Member
Sep 18, 2021
22
U.K.
Pool Size
15000
Surface
Vinyl
Chlorine
Liquid Chlorine
Last season I diligently drained the pump and left the drain plug out. Gone to recommission and the plug won’t tighten on the thread; just spins round just as it’s almost tight, and I can pull it straight out.

Bolt threads look OK so I assume the plastic pump body threads have stripped.. any ideas on how to fix that don’t involve a new pump?
I wondered if I could use Fernox LS-X or similar to seal it in, but not sure on the pressure at the bottom of the filter pot
 
If the drain plug pulls right out I don't think any sealing paste will hold it in.

But what do you have to lose by giving it a try?

Worst case you are gettting that new pump.

When you disconnect your old pump you can get a closer look at the drain hole and see what is going on with the threads. It may provide better ideas if a fix is possible.
 
803742CC-1DFD-4225-A02A-E92395E93BB2.jpeg
It’s hard to photo without a complete dismount but looks pretty stripped. I suspect someone before my ownership has used a sealant on it (yellow colour). Probably the “professional” who maintained it :confused:
 
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