Prest-o-Fit Sewer Fitting too Loose

[Kevin A]

I recently purchased a Prest-o-fit blue sewer system with push together fittings. Everything pushes together fine without leakage, but 3 different bayonet end fittings all fit loosely on our trailer sewer outlet. At least loosely enough that the gasket isn’t compressed and liquid shoots out when the dump valve is opened. I tried putting two gaskets on the fitting, but that was too thick to get it attached to the outlet. Our Rhino system had always fit tightly, so I wondered why there was a difference. Any suggestions? Are slightly thicker gaskets available?

[Mr.T]

We use the Blue presto-fit hose and fittings on our Scamp and the bayonet fits the black and gray tank valves normally.



Does the cap fit OK? If it does, maybe it's the wrong seal/gasket or it's just molded wrong.

[Kevin A]

Thanks. Since all three Prest-o-fit bayonette fittings seem a bit loose, I’ll try swapping a gasket from my Rhino. It seems the bayonette arms may be cut differently than a Rhino, requiring a thicker gasket. My other bayonette fittings have kind of snapped in place when attaching. The Prest-o-fit doesn’t. I’ll fiddle a bit.