Originally Posted by musigenesis
I'm looking forward to seeing you set all this up. Hopefully if hepvo valves are a disaster you'll have your disaster first.
I guess in the south this isn't a concern, but I'm concerned with insulating this whole arrangement. I'll have basically a drainage tub coming horizontally from the bottom of my tub, through the hepvo valve to the gray tank, the whole thing maybe 3 or 4 feet long. I guess I can just wrap the tube and the valve in pipe insulation or something. Maybe this doesn't need to be insulated if everything runs free into the tank, but I would suppose there might be residual moisture trapped in the hepvo valve that could freeze and jam it up.
I don't know much yet about how they work, and what water is left. But I do know two things; 1) my time in the south will actually be limited, but likely in the winter where we get to under 32F overnight twice a year, and 2) my time in cold weather will be maxed out at that. Freezing pipes are low on my concerns. I feel bad for you and anyone else who does winters.
Where are your sinks draining? I was researching this yesterday and saw you ask about draining them into your tub. Hopefully everybody talked you out of that? They joining below your tub I guess? I have no PVC but I'm hoping to go out today and lay it out with some string, get my slope and everything. Hung my grey water barrel up with strapping yesterday, just to keep it in place. Going to try my threaded rod idea, and maybe some unistrut.