Thanks, BigDave!

Yeah, even if I do the main drain integration out at the pool to begin with, I will by next season have it plumbed at the pad as well...

I forgot to mention that the area below the manifold by the heater is where the booster pump will sit if I go that route, and the area right between the heater and the existing pump in the back is perfect for a 15 gallon chlorine tank... I figure a Stenner 10GPD adjustable pump along with a 15 gallon 14" dia x 25" high round tank will pretty much take care of that pad for me...

If I go that route I will remove the water feed at the bottom of the main manifold, put a tee in with 2 90 degree elbows and then feed the chlorine in there as well as the water feed... My only concern is that the check valve could be sitting in a heavy chlorine concentrated solution, even though I checked with NPD and they stated that it would be fine in that application. Then again, it is only about $10 worth of valves/unions/fittings to replace that whole assembly, so it isn't a big deal...


Then again, for "no issues" I could always do a tapped fitting solvent-welded to the side of one of the tees or elbows and not have to worry about it... That is one of the major advantages of PVC, if you know what you are doing you can solvent-weld it pretty good without compromising the pipe...