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

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.

Great buy love it

As advertized. Good deal.

Good product

I like the product but I have two complaints. The first one is I had to use two band wrenches just to get the top off. Don’t know how they put it on there, but it took a lot to get that top off initially, also I cannot get the little screen to stay on the four tabs on the bottom every time I manage to get it on it pops off

Does a great job and well made.

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.

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.