Where would I add a winterization kit or use an existing fitting to add antifreeze to my system? Is the white plastic circle to the left of the pump a filter? Thanks
A 2 way valve and 2-3 ft hose can be added directly to the filter inlet side. Not sure what components the kits have, but should have all or almost all. Hose length is what you need to reach the A/F jug!!
If you can't push the pex tube back far enough to add the valve, cut and use sharkbite fittings as necc.