I have found a rubber washer that creates a perfect seal in the longshot plunger tube. The diameter of the washer is 36.6mm
I got it in one of these.
http://www.fixatap.com.au/product/washer-set/200044
But I've seen them available in single and multipacks.
Edit: out of time, brb with more info.
I got it in one of these.
http://www.fixatap.com.au/product/washer-set/200044
But I've seen them available in single and multipacks.
Edit: out of time, brb with more info.