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If you do plan on using sand then what you could do to minimize it getting into the pool is cement down and grout the ring of flagstone that will overhang the pool. Then you could do the rest in sand and any sand washing out would occur on the outside.

You can certainly flagstone over concrete. I did the same to my pool. Here is a link for the project, New pool proj.Flagstoning around (and on) my fiberglass pool I do not think sand would be a good idea. It will certainly run into the pool and since flagstones are not all the exact same depth...

I just wanted to give a big thumbs up for Frankenplugs for solving pool leaks in returns. (https://www.amazon.com/s?k=frankenplug&crid=1VV61J9Y6W1AR&sprefix=frankenplug,aps,75&ref=nb_sb_noss_2) My fiberglass pool had been losing about an 1" every other day all summer. I bought a leak detection...

I have to agree on the ball valves. I used the same on my pool when I installed it and regretted it within a year. I would pay to have upgrades ones installed that can be broken down and replaced if necessary. But your pool looks great.

I have done lots of fiberglass repairs albeit to fiberglass boats but the tech is the same. This should be pretty straightforwardif you are familiar with working with fiberglass. If it were me I would want to get a layer of wet fiberglass over that plywood in the back when I screwed it down...

Ward, I would recommend that you do a search for Koiphen and post your question on that site as well. That is a Koi pond construction forum and they do a ton of koi builds with block there. From what I has seen of their builds though they are almost certainly going to tell you to do a liner.

I would agree on the Type S mortar. Got any pictures of the area? You can use type s mortar to reattach the flagstone and also for the grout.

Yes you use it for both and additionally I tied the top of my tile to the bottom of my coping with the caulk as well. Super watertight! :)

Use Silicone. It is what is recommended for fiberglass pools. I installed my own waterline tile on my FG pool. I documented it here: https://www.troublefreepool.com/threads/new-pool-proj-flagstoning-around-and-on-my-fiberglass-pool.39533/ I had bought my tile and caulk from a company that...

Scrubby pads and water with dishwashing soap in it are a great way to smooth and clean up the joint after applying silicone.

If you click on his contact on any of his posts you can choose "Start a conversation" that will send an email to his inbox.

Well I was able to get my valves replaced finally. As I posted in another thread where the valves meet the concrete in the pump room is actually below the water level. I did not realize this until I cut both valves off and water started gushing out of both pipes! I had to stuff garbage bags into...

I think my crisis has been averted and the laws of nature are still working. It looks like where I cut these valves of on the pad is in fact slightly lower than the water level of the pool. I am draining the pool down below the skimmer to confirm.

Hello all. I had posted earlier about how both of my valves on the suction side (1x skimmer, 1x for the two bottom drains) were going bad and needing replacement. Well today I tried to take that project on and I have a weird issue that I had not forseen. Once I cut the two valves off, water is...

I think I have a new plan of attack. I am going to cut off both valves right where the inner pipe ends inside if them. I want to make sure that I am correct that it is just a small section of 1.5" pipe that has been reduced down. I have an aluminum flashlight that is almost perfectly the inside...

Here is what I am referring to. The back valve is the one that is leaking and needs to be replaced. What I have is 2" pipe coming up through the cement, reduced to 1.5" and the valves are glued onto that. As you can see I don't really have any space above the valves to just add another above it.

Unfortunately the problem one is leaking from the joint. I had to turn it the other day and I used a pipe wrench to turn it. It was really tight and when I had turned it back I had created a small leak in the joint. I could probably epoxy it sealed again but since I really need to replace the...

When I put my pool in I foolishly used box shop ball valves. I also foolishly cemented them fairly flush on the pool pad. One of them has failed on me and I need to replace it. I am wondering if anyone has any suggestions on how to remove a valve without damaging the PVC pipe underneath. I am...

I would consider tiling the pool up to the lower indention on the coping.

I cannot find any information on Mapesil T Silastic Caulk but it sounds like silicone caulk? If so that is what I would use. I used pool grade silicone caulk to install a tile line in my fiberglass pool as well as to bond the pool to the underside of my flagstone deck. It has held up great over...

If you are careful you could use an angle grinder to get the old caulk and grout off. Otherwise just use a razor. but use silicone to attach the new tile and then also silicone to grout it. Done correctly it'll last for a long time. Drain the pool down to the level that you want to tile up from...

I also have a fiberglass pool and initially did mine without coping but always felt that it looked kind of bathtub-ish so I ended up doing a cantilevered flagstone deck around mine and am much happier with that look. If you do a cantilever and then also a tile line, you can caulk them together...

take some pics and show them to us. Your flagstone were possibly not put down well in the first place and mortar/grout should work well to secure them back down. If there was a fracture line or a fracture line was created along where those stone are coming up then you probably need to work with...

I vote against sealing. I spent decent money on a highly rated sealant, Dupont StoneTech® Professional Enhancer Pro™ Sealer , ($145 per gallon) and within months the my flagstone looked pretty much like it did before sealing. That was eight years ago. my flagstone today looks just as good as it...

I just wanted to update that I purchased a Circupool SJ-55. I went with this unit because it just had a price drop to $879.00 and had a longer warranty on the unit and salt cell than the other unit that I was considering, the Universal40. It was pretty easy to install and runs like a champ. The...

This is my pool: https://www.troublefreepool.com/threads/keithws-pool-pics.135/ https://www.troublefreepool.com/threads/new-pool-proj-flagstoning-around-and-on-my-fiberglass-pool.39533/ The pump is in the rock waterfall on the far side as is the filter and all of my piping.

Hello there. I have a basic 6K gallon fiberglass pool that I have been chlorinating happy for the past ten-ish years with a bleach Liquidator. Due to the current pandemic bleach has become a really scare commodity and I just don't see that changing any time soon so I guess that I need to get a...

Extending sprinkler heads is really easy. Just 3/4" or 1/2" PVC usually and get a male and female adapter smooth female on one end and screw on on the other and cut and glue them to size and just unscrew the existing sprinkler and screw on the extension and screw that back onto the pipe.

I installed my own tile line as well many years after I installed my FG pool (tile installed in 2012, I think I installed the pool in 2005) & used silicone for the adhesive and the grout. I contacted a number of companies back then that sold "kits" for fiberglass pools that included the tile...

Congrats on the pool reno. Looks very professionally done. What is the plan/purpose of the 4x4 post that was cut flush in the near end of the photo above.