I'd like to replace a radiator but need to lower the pressure first. The radiator's on the second floor of a two-story. It's a gas-fired hot water.

I'm going to hire someone but would like to get a general idea of the work involved to depressurize. Thanks.

million, July 2012

SD- thanks.

Unfortunately, there are no valves available. Maybe under the floor tiles?

million, July 2012

On the radiator, you have a bleed valve, you can use that to reduce the pressure. BUT, For 1 radiator, just turn it off at both valves, undo the couplings, 1 at a time, which with the bleed valve open, will allow the water to escape and drain into a container. There is no need to reduce pressure in the complete system. After replacing the radiator, just need to top the system up after opening the valves.

SD, July 2012