[Angleseyskipper]

yep it uses a leather washer and the piston and jacket is all brass.
it uses distilled water which is in the jacket around the piston for cooling.
there's a water seperator stack with a silica gel stack in the top before it goes out to the whip, safe as houses.
its single phase motor drives a serious reduction gear box to drive the piston NICE and SLOW.
we have a sheet of saddle leather salvaged off the S.S.Breda which gives us a life time of washers.
i've had it 4 years as we have 2 inspirations to feed.
its a nice simple machine of very high quality,dread to think what it would cost to produce today.
all the best elfyn