In the last few weeks our swimming pool has suddenly started to lose water (more than can be accounted for by evaporation).
The liner is relatively new - 10 years or so - so I’m guessing it’s not that.
I’d be grateful for suggestions please as to how we go about finding the leak. Thanks.
Its possible someone has damaged the liner - gite guest (it happened to us). You might be able to narrow it down by getting in the pool and feeling for spongy areas with your feet.
One of many, but you may need something more substantial, depending on leak.
You will also need a uv light…
(edit - not sure on this looking at the product details again. I am going by a liquid that I saw being used way back, where a uv light was used…)
Hello Sue.
Everything I have read about pool liners indicates a life of 5 to 10 years, so on that basis yours is not relatively new. Unless it is a very special material.
I have searched using Google this phrase:- “how do i find a leak in my swimming pool which has a liner”. Several suggestions come up including this video which I thought was succinct and helpful
Best of luck
Graeme
Thanks Graeme - very useful.
24 years still going strong here. Some liners in America, the source of most of the information are very thin and poor quality, also above ground pools are much thinner but get lumped in with in ground pool liners.
Turn off the valves on the pump inlet and return lines if fitted to isolate the equipment from the pool basin, plugs can be purchased for blocking the skimmer lines and corks can block return lines. If it’s a liner leak, do you have a light? Usually the point of leaks. If it is the liner the then the national fuite detection company could help or find someone with the Leak Trac equipment, that located the point of a leak in under 20 minutes normally. Dye is really only useful for confirming the exact point of a leak rather than finding it first. Hope that helps.
Thanks Corona. And everyone else. I’ll go exploring tomorrow.
I’m going to call a local detection company Monday that has got good reviews on Google. We’re away for two weeks Monday week and I need to find out what’s happening before we go, so we can make some sensible decisions. I could be faffing around. They won’t be. 
Make sure they have Leak Trac, it’s a machine for finding leaks very quickly. Otherwise they may pfaff around at your expense for hours. Never took me more than 20 mins to locate a leak in a liner.
It’s these guys - well reviewed
Yep they show the leak Trac on their website
Great.
Thanks for checking.
I’d suggest you ask them specifically if they will use it and insist that they do.