Do RV 35's usually re-seal ok if not been opened for a long time? Have some on a system and I can't see why its there not at a high point and theree's rads above to draw air out. Wondering whether there is much point opening after re-filling is on a sealed system. Maybe it is there from when the house had a vented system?
RV 35'S
- Thread starter Fredstudio
- Start date
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The washers are usually shot, but sometimes you're lucky.
So maybe not open it?
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Not without a backup plan 
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