The tank is 1/2\" and 3/4\" poly pro, but I also had this drip tray made for the pump. It is PVC so I can glue fittings to it. There will be a 1\" drain thru the floor to the street, and the outlet from the tank will have a tee and ball valve to allow for complete draining. This will be a 3/4 pipe sticking down through the drain of this tub. The pump shown is the dead one that came with my coach. I plan to mount a new one with the motor facing up so if the pump leaks, I t cannot rust the motor as this one did.