Benjamin Sheridan s397 repair

[longhunter]

If your check valve is a white delrin one, the dimple goes towards the front of the valve.
Mark an "x" on the flat side, so you can tell if it flipped when you dropped it in. You should see the "x" when it's in the valve.
Next, take a wooden dowel and a small hammer. Place the dowel against the back of the check valve and give it a light tap, or two. This will form the check valve face to the exhaust face of the valve.
If you don't do this, the valve may not hold air.

[Arthur]

got in touch with him and the part should be here any day, thanks for all the help