Check Valve Location


LifeTime Supporter
Jun 7, 2014
Fort Myers, Florida
There was one there, but someone had removed the flapper in it, it was just before the chlorinator which i removed and installed swg, i better put one back in. Thanks for the help.


TFP Expert
LifeTime Supporter
Aug 17, 2012
Elverson Pa.
That's what I'm getting out of reading. You should be fine without it with the SWG. If you had the inline chlorinator then you would need it. 😎


Mod Squad
TFP Expert
LifeTime Supporter
May 19, 2010
Tucson, AZ
Yup. Trichlor feeders make acid water, even when pump is off, which can apparently backfeed into the heater. The SWG does not make acid water and it does not generate when the pump is off.