[an error occurred while processing this directive]
Posted by joe on May 16, 2006 at 09:28:43:
last sentence of paragraph 2 ("Do #2"):
"Install a swing check valve on the return side of each zone to block the return side. The latter is necessary because buoyancy forces try to establish two-way flow in the return pipe. "
Does this apply to the European 2 pipe circuit installation?
Post a Followup