I have been servicing replacing the o rings in my quick fill hw it's about 8 years old. The question is, betwee the belville washer pack and the inlet valve there is the little piston on mine this sits in a piece of tube or cylinder this has an o ring closer to one end. Which way round does this go oring closer to inlet valve or washer pack, there is an o ring that sits round it on the inlet valve end, it's not this on bout the on on the piston cylinder tube (this also has a hole in it might be the hole position that is critical ?) Any help would be much appreciated as this part does not seem to appear on drawings I can find.
Thanks
Bryan