Voted Best Answer
Mar 23, 2017 - 05:00 PM
For these classic models, the best way to determine exactly which cell you need is by taking a quick look at what you currently have installed. Look down through the clear housing if it is currently in the plumbing, and count the number of large rectangular titanium plates (blades). The RJ16/RJ20 has 4 blades, the RJ30 has 5 blades, the RJ45 has 7 blades, and the RJ60 has 10 blades. If you are still unsure after looking, just give us a call (866-766-5243).
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