Voted Best Answer
May 30, 2019 - 05:00 PM
It's the same length cell, but your Pentair threaded unions aren't fully compatible. If you want to upgrade your system without having to replumb, take a look at the SJ-20 with its Pentair adapter kit. Otherwise the RJ20 is an excellent system to put in, I think it would be worth the little bit of work to plumb it in.
