"m Ransley" wrote in message
...
You keep saying vented, steam radiator systems are vented not hw heat.
There are air bleed valves on Hw radiators to remove air , but once air
is removed they are closed, and kept closed or water would pour out.
Don't the radiators have shut off valves. Do you mean turning off the
water at the boiler, that is circulation and some is needed so pipes do
not freeze. What you state makes no sense.


Mark, it depends on how his system is set up. If he has monoflow fittings,
he can shut off individual rads. If it's a series circuit, he can't without
effecting the entire loop/zone.