Hi. This relates to a post I put up on 19/11/08, but there’s now been some progress. The problem relates to air continually getting into radiators and the F & E tank filling with hot water and overflowing when the central heating pump is running. The system is about 40 years old, open vented, gravity HW and pumped central heating.
Last night I put the end of the vent pipe over the F & E tank into a jug of water. This morning it was empty (600ml gone) proving that the vent is sucking and probably explaining why air is entering the system. The F & E tank is also full of some fairly murky, dark red/brown water.
Question now is, why is it sucking and what do I do about it?
Last night I put the end of the vent pipe over the F & E tank into a jug of water. This morning it was empty (600ml gone) proving that the vent is sucking and probably explaining why air is entering the system. The F & E tank is also full of some fairly murky, dark red/brown water.
Question now is, why is it sucking and what do I do about it?