Review on Thetford 01664 Plain Valve Cap by Tim Wheeler

Thetford manufacture high quality RV items, but their own sewer connection sizes make it difficult to source the necessary parts for quick repairs/maintenance. I should mention that I think Airstream mainly uses this native size. The Airstream factory charges about $30 for this part, which I bought from Revain for less than $17 including shipping. Similar savings on some Thetford parts at Revain.