Hi guys, Need some assistance in fixing a leaking Disco valve. I replaced all the o-rings on the gauge port and fill adapter. I also replaced 18D and 18F on the valve. The diagram shows another o-ring, 18E. How do you access this o-ring and what size is it? I did put everything back together without replacing 18E and it still leaks out of the valve end. The only thing I can think of is that 18E is the culprit.
This is what happened after replacing everything except 18E.