Thanks Colin, I had already been looking at John's manual addition valves for o2 and diluent. Looks like a well built solution to the problem.
Cheers,
Al.
Quote: (Originally Posted by
colinicky)

This is the drawing that Paul put in the gallery :-
RebreatherWorld Gallery - Lung_Box_Rev_C - Powered by PhotoPost
If you want a way of adding O2 & dil talk to John (
narked@90) as he does a lovely manual add modification
See here:-
PRODUCT
HTH