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I need to order a new multiport valve and I'm not sure if I have 1.5" or 2" connections to the pool lines. I've learned in the past with household plumbing that it isn't always as easy as it sounds (e.g., inside vs outside diameter, different connection types) and in fact it's often the...

The home I moved into in 2014 had an inground pool in need of A LOT of TLC. After learning the water chemistry basics thanks to this forum, I then had to take on the failing tile and coping from years of neglect. In June 2019 we had the tile and coping replaced with great results. Fast...

Just noticed this crack at a drain(?) screw or plug on my MPV. Any suggestions for the possibility of fixing or mitigating the cracks? (Edit- found the answer to my question about should it be a metal plug, answer is no, put part # in below reply) Last pic is a friend that was there when I...

It seems that my filter belly o-ring has gotten larger with time. It's getting harder to make it fit in the groove that it sits in. Has anyone experienced this before? The condition looks great otherwise. I've been losing prime overnight and starting to think it may be time to replace the...

I believe I have a clog in the main drain line. If I set my diverter to pull only from the main drain I lose prime. If set the diverters to about 80:20 skimmers:main drain, all is well. I've tested for air leaks at the above ground plumbing and valves and don't see anything causing air leaks...

Just want to check with the community to see if I'm going about this the best way. I have a new pressure relief assembly and a new drain plug o-ring to install on my DE filter (have leaks at both spots). I recently broke the whole thing down, cleaned well, and loaded up new DE. This was an...

Have a decent size leak at the DE filter drain plug. Broke it all down today for a good cleaning. Drain plug o-ring looked ok, but seemed a little rigid (not as elastic feeling as a typical new o-ring) but no major cracks/brittleness. I lubed up the o-ring, put ~3 wraps of teflon tape on it...

I'm taking out an old, busted pool heater. Didn't work when we moved in, no plans to replace it in near future. I've attached a picture of the liquid propane line that has a ball valve and then a plug valve (?, turquoise colored part in pic) on top of that. Would you recommend capping the...

I had a leak at the pump union connection at the end of last season when closing, so just now getting around to fixing it since ready to open. I assume it's an o-ring (5+ years old), and I also assume it's best to just replace the whole part of the union that threads into the pump since I have...

First, I have to say this site is awesome! I've already learned a bunch and have become much less reliant on the pool store's water testing. I own the TF-100 kit and am just beginning to use it. I've read the basic info on the Pool School pages, etc. It all makes sense and I'm convinced TFP...

I recently purchased a short sale home with an ~25000 gallon inground pool w/ DE filter. This is the 2nd year I've owned it and I've finally managed to get all the leaves/debris out (previous owner did not have appropriate cover and apparently hadn't opened pool in some time- the amount of...