Radiators still running water

[Fontanero]

I am just beginning and had to change some bleeds on some radiators for automatic air bleeds on a gravity fed system. I shut off power to boiler pump etc and shut down the valves (one trv) at each end of four radiators. One radiator behaved as expected and had a dribble of water when removing the bleed. The other three gushed with no sign of stopping. I do not understand why and the only thing I can think off is that the valves are clogged up and did were not actually shut down even when tightened:20: on all but one radiator. Any ideas why this should have happened?

 

[PlumbBobBob]

possibly the trvs are on return not flow. just turn off the lock shield at the other end. oh and welcome to the forums.

 

[Fontanero]

I thought about that, but only one rad had a trv , the others just has open/shut valves. I shut down both the lockshields and trv andopen/shut valves before removing the bleeds. It seems too much of a coincidence for all valves except the two on one rad to by faulty. What am I not seeing?

 

[PlumbBobBob]

different situation then. the valves aren't shutting off properly, most likely like you said clogged valves not shutting off. what sort of system do you have open vented or sealed/pressurised?

 

[Fontanero]

Its an open system with conventional non system boiler

 

[Ermintrude]

Plug vent and fill. Fill with carrot and vent with potato jammed on end ?!

 

[REDSAW]

Plug vent and fill. Fill with carrot and vent with potato jammed on end ?!

you ever worked for bg?

 

[Fontanero]

Thanks for the help Not sure I have come across those particular terms, go on, spell it out for me. Was I right to suspect clogged valves?

 

[Ermintrude]

you ever worked for bg?

10 years man and boy! Errr no!

 

[Ermintrude]

Yes possibly valves.

Get small tapered carrot and large new potato not a Maris piper or huge jacket!

Go to heating headder tank. Shove carrot in the hole where a pipe connects to bottom of it feom inside so you preent any more water leaving tank. Carful not to snap it.

Pipe that hooks over top if tank, ram potato on to it. Thus creating air tight system no leaks or very small amount. .

Ensure u remove all vegetable matter then removing them. Do carrot first .

 

[jam1979]

or you could just tie up your ball valve and drain the system or turn your stopcock off

 

[MK Heating]

Yes possibly valves.

Get small tapered carrot and large new potato not a Maris piper or huge jacket!

Go to heating headder tank. Shove carrot in the hole where a pipe connects to bottom of it feom inside so you preent any more water leaving tank. Carful not to snap it.

Pipe that hooks over top if tank, ram potato on to it. Thus creating air tight system no leaks or very small amount. .

Ensure u remove all vegetable matter then removing them. Do carrot first .

OMG That's hillarious

 

[MK Heating]

There are tools available for the method above now, Instead of the need to use root vegetables Toolstation > Hand Tools > Plumbers Tools > Radiator Valve Change Kit

 

[PlumbBobBob]

root veggies are cheaper though

 

[clarky101]

You could use a parsnip and a turnip if you want..........

 

[Ermintrude]

There are tools available for the method above now, Instead of the need to use root vegetables Toolstation > Hand Tools > Plumbers Tools > Radiator Valve Change Kit

There weren't. 25 years ago! Plus regin ones about £13 carrot 20p spud the same !

 

[Ermintrude]

You could use a parsnip and a turnip if you want..........

Not making a stew!

 

[Paulus]

Not making a stew!

Hey don't waste them after the jobs done, make a stew.