I had my water heater disconnected this weekend, with the water turned off at both the cold supply to the water heater and the main supply. When I turned on the water at the main, the water heater started filling through the hot-out (cold supply still off). After verifying that all the faucets where off, I checked the hot water valve on the two-handled faucets and they all had full pressure on the hot side (with the supply valve still off at the water heater). So somehow my hot and cold circuits are connected.
I asked the plumber who reno'd the place for the previous owner and was told that this was because of a pressure-balancing valve.
Is this normal function for a pressure-balancing valve, or is there something else going on? I've only got one mixer valve in the house (tub/shower - the kind that rotates from off thru cold to hot with no seperate pressure adjustment) - everything else is two-handled faucets.
No announcement yet.
Pressure-balancing valve = cold water on the hot water circuit?