New pool owner, first leak!

tobitoy

Member
May 14, 2025
9
Sweden
So we bought a house with a fibreglass pool thats about 10 years old. Last year it worked fine but this spring i detected a leak. Confirmed by the bucket test.

For winter shutdown I emptied the pool below the inlets so I don’t suspect the lights to be the issue. However today I discovered small cracks in the skimmer faceplate. They are small but could this be the source of the issue? I’m loosing about 4mm per 24hrs with pump shutoff. The pool is 8x4m.

I have inspected the connection between skimmer and main drain and there is no leak there.
 

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Welcome to TFP.
Cracks in the skimmer faceplate can be an issue. Is the pool now filled to the middle of the skimmer?
You can do a dye test by using a syringe with a food color dye. Squirt it near the crack to watch if it is sucked into the crack.

Do you have 1 skimmer or 2?
 
water is sipping out from the front plate out the backplate. I also confirmed it with dye test. I can barely reach backside but it is possible.

There also seem to have been a old repair but as soon as I touched the seleant it just crumbled
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It is a plastic skimmer and a fibreglass pool.

So if I understand correctly I just seal the leak by putting the putty on the backside where the skimmer meets the pool (marked in green) ?
Yes. Since the crack seems to be on the plastic. Try that first.
The alternative is a repair product for fiberglass. I am not familiar with that so you may have better insight to that.
 

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The first photos are from the front of my skimmer, the faceplate. When I did the dyetest it was not obvisous that dye sipped trough the cracks. Where it was very obvious tho was in the part attached to this post. The joint where the

SKIMMER ESCUTCHEON PLATE meets with the skimmer tounge


I might be able to remove front plate. The back not so much without cutting my drain plumbing
 

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For the crack on the faceplate try to put some plastic bonder on it (or something similar that may be available in Sweden). Even though it appears not to be a leak, it is good to make it stronger and prevent it from getting worse.

For the skimmer plate it appears to be a seal leak. Can that skimmer be removed and seal inspected?