Drain Bayonet size

[B and R]

Hello, We have an 86 Airstream Squarestream and enjoy it. However, I needed to replace the drain line bayonet fitting and have determined it is larger than the standard one you buy online, Walmart etc.

The cap that is on the drain is like 3 13/16 Valterra brand (sp)

Who sells a drain line kit for a larger than what is standard today?

Thanks to all.

B and R

I have a new drain line system in the box that will not fit.

[pmclemore]

Yours is likely a Thetford fitting. You can find Thetford to Valterra adapters.

Pat