Water loss question / problem

[kmarkm]

I have an in ground liner pool that is 3 years old. On Saturday I performed a backwash and rise sequence with my sand filter. On Sunday I noticed the water was low, added more water (didn't think anything of it at the time). Monday after work I noticed water loss again - so I added more water and marked the level. Tuesday afternoon I had 3/4" of water loss in 24 hours and Wednesday afternoon I had 1/2" of water loss in 24 hours (with the pool NOT running) yesterday afternoon I attempted to perform a die test to find a potential leak, no luck.

Has anyone else experienced a similar issue?

 

[mknauss]

Welcome to the forum!
Check your multi valve. Be sure it is not bypassing to waste when the pump is running.
I suggest you read ABC's of Pool Water Chemistry.

 

[kmarkm]

I thought that it could be the multiport valve as well - but the pool has been off for two days - could it still leak with the pump not running?

 

[mknauss]

It could. Via siphon. Can you see were the waste goes to?

 

[kmarkm]

The waste pipe runs underground and is tied into the storm drain, which is also underground - so unfortunately I'm unable to see it

 

[mknauss]

OK -- set the valve on Recirculate and see if the loss stops.

 

[kmarkm]

I'll give it a shot - thx for the tip

 

[kmarkm]

Well... it does not appear that the water is leaking back through the sand filter via backwash. I disassembled the piping coming out of the sand filter from the backwash, no water has been leaking out of there.

I performed a Dye test in the pool myself, it did not come up with anything leaking that I found.

Could it be that I am just experiencing that much of evaporation? The last few days the water loss has not been consistent, anywhere between 1/4 inch and 3/4 of an inch within a 24-hour. I do live in a very hot and humid climate in south Louisiana common this past week has been extremely humid.

 

[Jimrahbe]

K,

Have you done a bucket test??

https://www.google.com/url?sa=t&rct=j&q=&esrc=s&source=web&cd=3&cad=rja&uact=8&ved=2ahUKEwiAp5fj8JvkAhULY6wKHSVDDxEQwqsBMAJ6BAgJEAo&url=https%3A%2F%2Fwww.youtube.com%2Fwatch%3Fv%3DlUdc94agRKw&usg=AOvVaw3s-tTy0Qmm3WV9V8uTu2ff

Thanks,

Jim R.

 

[kmarkm]

I did...I did not have the bucket in the pool, I had the bucket adjacent to the pool right next to the lip in the shallow end. The results were inconclusive

 

[duraleigh]

We typically believe 1/4" daily is attributable to evaporation.......anything more than that should be considered a leak.

Do the bucket test precisely. It's a little trouble but the results are very conclusive.

To keep the effects of evaporation out of this test, fill a bucket with water, mark the level of the water in the bucket, set it on the stairs and compare the water loss between the pool level and the bucket level.

 

[kmarkm]

We typically believe 1/4" daily is attributable to evaporation.......anything more than that should be considered a leak.

Do the bucket test precisely. It's a little trouble but the results are very conclusive.

Thanks for the tip, I'll give it a shot. Unfortunately we have 80% chance of rain in my area for the next few days