For sale is a RWV gate check valve with a little cute gate that closes for one direction and opens for another. Meant for sweat soldering. ID is slightly over 2 inches. New old stock, never used. The gate closes very well, I tried blowing air through it and hardly any would go through. Determination of applicability is sole responsibility of the buyer.
I have several more of these, I will offer them to the highest bidder, with no extra shipping charge.