Quote Originally Posted by tphaggerty
You many need to move the vacuum breaker around some in order to prevent constant bubbling, we originally started with ours opposite the input, then moved it up, then finally installed it about 2/3 of the way up the return pipe next to the house.
Thanks again for the Info -- we finished the installation Saturday.

I am having problem with air in the system. We have the panels on two different roofs - with about 150 of piping. We installed the vacuum relief as indicated -- but when we send all of the water through the panels -- we get air -- however, when I send some water to the roof and some through the bypass -- no air. I'm guessing their is too much pressuring going down with full water ( causing a syphon effect ) pulling the vacuum and letting air in - but with partial water pressure it balances out and no air. Now, if this were the case, wouldn't the vacuum be stronger 2/3 way up on the return pipe and let air in? I was thinking it needed to be lower on the supply so more water pressure kept it closed? (This vacuum relief really confuses me).

Any suggestions appreciated (please).

Any suggestion appreciated - I