Need to seal the fuel pump to the aluminum tank. It is a modular pump set on springed legs with a plastic hat.
The opening in the tank needs to be 5" diameter for the setup to drop in and the OEM set up has a flange built in to the tank so I cannot use it.
I have not found a fuel flange for a 5 " hole so I need to make one. While searching I found schedule 80 PVC flanges that might work. Is there any issue using PVC flange and a Viton gasket on the wet side? I was thinking I could solvent weld PVC bolts to the inner flange to seal them. I think the PVC bolts could handle the minimal torque needed to seal the gasket.
The alternative is make one from scratch out of 1/4" steel and weld bolts to the inner ring.