arent the controls for the Swg separate from the pump controls? I have a sand filter/pump and the separate Swg.If you have one cotrol for the whole combo unit, the SWG may not run if the pump is not on.Maybe someone with that unit will chime in
Yep, I just looked up your manual. One master control turns on the pump and / or the SWG. The manual states you can run the pump without the SWG on, but not the SWG without the pump running.YOu can only try it and see. If the SWG will turns on without the pump, it will work without connecting the old pump/ Filter.Try connecting it as we figured out, have the new pump running, and try the SWG.My SWG has a flow switch that has an error code if the pump is not on. Yours may run without the old pump running if it is just a flow switch in the SWG and ube that needs to be ok for the SWG to work.