Still Chasing leaks in the under dash controls, have been advised to solder a 1/4'' copper tube over the 3/16'' short pipe which fits into the pressure bag to gain better initial seal, the surface condition is also important.
The best & only place for these parts is Graham Brown VCSA 020 8651 5347,they also reproduce the under bonnet pump units in brass.
The bronze balls & stainless springs for the none return valve i obtained from a model steam engine outlet, i can dig out the supplier if anybody needs them.
Ronin