hello again
little info needed............ again
A indirect 125 megaflo is fitted, the home owner is now removing the lpg heating and going electric, no boiler, storage only
the flow and return to megaflo will be disconected,
my question is :-
do they need capped on the cylinder or left open,

Cheers again

They should be left open

A general rule is nothing should be sealed unless designed to be so

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thanks for reply