looks good to me, I saw ur build thread this is a fiberglass shell right? having unions on everything is the best way just make sure to get decent ones the big box stores often have poor quality. Im in cold climate too about to start on mine, I saw ppl using Ts after the 3 way valve with a bushing and plug in it to be able to attach an air fitting to the line to blow them out. Prob what Im gonna do to make winterizing easy peezy, unless you are planning on pulling equipment off pad then u can just blow into plugs in lines.
With the SWCG Union, you will have a perfect spot to connect a shop vac or a cyclone blower. Way easier than using a compressor. The same goes for the skimmer side of the pump.
That would work I'm trying to keep my plumbing tight so street 90s out of the 3way and then the Ts w a threaded bushing on short side and a plug. I use compressor for my irrigation too so easier for me as well but as poolmedic said can use shop vac I just feel its easier to use a fitting and air if u have a decent size compressor
Also, what about check valves? do I need one between heater and SWCG?
I just asked that same question in my thread, as I have one right before my SWG and was wondering if I could get rid of it. My SWG installation instructions suggest a straight run of pipe (12" I think) before the SWG. I believe that is to lessen turbulence inside the SWG. Check your SWG instructions for that.
I was told my check before the SWG was a throw back from when there used to be a tab feeder in that location. Tab feeders leach chlorine into the pipe, flow or no, so the check was there to keep that highly concentrated chlorine water from back flowing into the heater, where it would wreck havoc on the heater's internal components. Since an SWG only produces chlorine when the water is flowing, the danger to the heater no longer exists. So I got the green light to remove that check valve.
And I further asked if I needed any checks, as my equipment is all above water level. I was told I didn't need any...
For what it's worth, and some here question this practice as unnecessary, I use sweep 90s wherever I can, to improve flow. There was some experimentation here to determine if they really make a difference. It was somewhat inconclusive. But they just make sense to me... If you decide to use them, be sure they are Schedule 40, as the sweeps you'll find at the big box stores are generally not, they're for waste, not pressure.
Awesome info, thanks.
Here in Canada we have a hard time getting a selection of PVC as it is not commonly used. I ordered all kinds of fittings from a US dealer. I don't have sweep 90's but a pair of street 45's are almost as good.
I'm looking forward to plumbing my pad to be honest. I plan on doing a lot of heat bending of 2" pvc just because it looks awesome vs using fittings. hahaha
That would work I'm trying to keep my plumbing tight so street 90s out of the 3way and then the Ts w a threaded bushing on short side and a plug. I use compressor for my irrigation too so easier for me as well but as poolmedic said can use shop vac I just feel its easier to use a fitting and air if u have a decent size compressor