I have an in-ground pool, 18' x 36". I has 4 cartridges in the filter.
I opened my filter and it had sand in it (it should not have sand in it). When I had the pavers done, the wind kept blowing the sand in until they sealed the spaces.
Additionally, 2 jets or returns (The first one in the low end... if I plug it will build up pressure and when I unplug it a gush of water will come out but that's the end of it. The 2nd one in the deep end, has nothing coming out of it).
There could be something in the lines (sand, gravel) OR the lines are kinked. I would like to take the least expensive route, first. This would be to blow out the lines. What is strong enough to blow sand out of the lines? Anything? IS there some kind of snake that would be safe to use? If this does not work, the next step would be $ 5,000 to pick up all the paver blocks, lay new lines and put the paver blocks back.
I do have 2 more at the steps which work great.
I was told I can run the pool with just the 2 jets at the steps because it keeps the pool clean. But I would like it all to work correctly.
What is STRONG enough to blow out sand or gravel or something to push it out?
I do understand this may not be the issue (it could be a kinked line) but lets start with this.