Re: PVC Tank How To
I wonder if that red gasket is fuel proof. Someone told me the black ones are not for sure but I should look for the red one like you have. I asked them if they knew for sure the red one was ok with gas and they said probably but they didn't know for sure.
If it isn't you could use a fuel resistant o-ring. My local Harbor Freight just started carrying them. The o-rings are brown color and are sold in a plastic box in an assortment of sizes. I do like the idea of the gasket shown in your picture better thought and if it is fuel resistant then that is the way to go.