OK, scratch all that because its not going to work. There is no internally threaded male pipes only female which obviously do not fit into the shower drain female ends. I have figured it out thou. The tank will be on 4 cinder blocks, 2 cinder blocks tall on the left and right sides. The 2 shower drains will be installed close to the center of the tank and I will connect the ball valve directly to the shower drain with a short 2" pipe and the smooth 90° directly to the ball valve and the drain valves will come out to the left as planned where I dug a ditch using my heat gun and sand in the pipe to bend it as needed. I will also bury 2-4" pipes above the drains that line up perfectly with each valve T-handle and make 2-3" pvc pipe valve extensions (slotted at one end to fit over valve) as 2" at 4' long may not be able to handle the torsion from the torque required to turn these. I will put a piece of 2" in the slotted ends which will be slotted also to make sure it centers on the valve, drill a few little holes and use tiny bungee cords to keep them on the valves. Then my stream/small waterfalls off the fines filter can still be built easily on top of this stuff. Just have to make sure the 4" tunnels or the tank do not settle to the tools do not line up to the valves. This is how my original design should have been, just never really planed any of this out. Just figuring it out as I go, but im glad I thought about this problem before I installed it all and had the pipes crack open this winter and I would have had to shut it down and fix it next year.
DrDave said:
Use a 2" shower drain. It does the same thing and instead of $50, they are about $5. My plumbing supply charged me $48 plus tax for my first one, then I found the drains at Home Depot.
For the 2” shower drain to bulkheads, how did you seal the pipe in the top end? On mine if I grind the little tabs away (at the bottom of the upper portion) that prevent the 2” from going into it, then I can stick a 2” pipe in there and glue it in place pretty good. But Its not going to be completely rigid like the bottom which has a real female end. Im not worried about it, but want to know how you do it.