Pentair R171096 Rainbow 320 Automatic in-Line Chlorine/Bromine Feeder for Pool and Spa

Relatively easy to install. No leaks and running like a champ. Great price based on my pool parts supplier

This chlorinator works great. We saved about $100 from the price of any local pool supply store. Easy to install.

Exact fit. I read other reviews on the knock off brand. This is exactly what I needed. It came with the extra hose as well. If you use 1 inch tabs use the bottom hole. If you use the 3 inch tabs use the top. Even came with libe for the O ring. Make sure you use Teflon tape and only hand tighten the lid so it won't get stuck on.

I have a 10 year old pool system with pentair everything. During the 2021 Texas Freeze my original chlorinator froze, cracked, and started leaking. Multiple applications of glue - still leaked. I finally turned it off and tried switching to CalHypo (NEVER put CalHypo into an in-line chlorinator!!) in the filter baskets - but the calcium load clogged my pipes. Then switched to 10% liquid chlorine, but that faded so fast I was using 2 gallons ($12) per week in my 11,000 gallon pool. I had resisted getting a replacement Pentair because I'd read somewhere Pentair had changed the threads. The leak had finally increased to the point where I simply HAD to replace it - so I ordered this. It Fit PERFECTLY! Had it been necessary I would have hired a pool guy to replace the piping, but the threads were identical to my 2014 pool system and this became a 20 minute DIY project.

24 minutes from delivery to installed! Removed the set screw from the bottom of my existing chlorine feeder, unscrewed it and the hose/etc. The new one was setup at the bottom vs. top, so I unscrewed the existing fittings on the new one (already wrapped in teflon tape btw - nice), screwed them in at the top, installed the plug, screwed on the feeder, and put in the set screw. From delivery to feeding chlorine in under 30 minutes. NICE!

It works great and I had someone install it and it wasn't bad. The issue is when you using it the top is hard to twist off without lubricant. I suggest buying the wrench that works with this chlorinator to open the top of it to put tablets in.

Item was as described.

I had a 7-yr old chlorinator (off-brand copy of the Pentair 320), and it was starting to have issues with the check valve and the chlorine control valve. I could have bought parts separately but the cost was getting close to a full swap. I decided a new one was needed and I couldn’t be happier. Since I chose to keep the diverter tee to avoid disconnecting existing flow tubes, that meant I needed to change out the flex tube, spring and its fittings which was super easy. I added a little more plumbing tape when I rethreaded the tube fixtures to the control valve and housing body, just to be safe. Be patient, the housing will fit and you can tighten enough to keep the orientation of the tube. The little screw that keeps the housing from spinning was tedious, and probably took 10 minutes itself to get reseeded. But it was just a tight fit for my equipment, not the fault of the screw necessarily. The entire swap took less than 30 minutes (if that), including salvaging some existing tabs. Be careful of the dangerous fumes from the existing equipment and old tablets, please wear a mask or keep your breathing protected. Very pleased with experience thus far.

Works great, for my pool I almost always have to have it set to 5 on the dial, but that is okay. I did have to run the fill tube to the top port, the bottom one didn't seem to do much if anything, but the longer tube was supplied and took about 5 minutes to change.