whistlin rad valves ?

[bdog]

new valves new combi old pipework why do rad valves whistle like a kettle? please

 

[jumbo55]

trust you have flushed the heating system bdog. this sometimes happens when you only have one or two rads on, and the rest off. try turning the lockshield down a bit with heating running, see if this makes any difference, good luck.

 

[kevplumb]

new valves new combi old pipework

no bypass

 

[JohnD]

You can also turn the pump speed down from 3 to 1. this will reduce the velocity of water squirting through the narrow valves.

Have you got Thermostatic radiator valves? Can you see a direction arrow cast onto the valve bodies?

Have you got a room thermostat, and is it working?

 

[kevplumb]

new valves new combi old pipework

don't think turning the pump speed down is advisable john

 

[doitall]

No bypass

Microbore pipes

 

[Duzzer]

Don't turn pump down to 1 on a combi keep on 3 the whistling is prob high flow rate trying to go through small gap in rad valves try opening them more to see if quietens down

 

[BenRL]

turn down the pump speed on a combi john??? u should NEVER do that