Noisy radiator on new system

Milo19

Yeah - I turned it off and then opened it 1/4
still made the noise so adjusted it to 1/2 open and still making a noise. Turned the rad off last night and now the radiator in another upstairs room is making the noise from the TRV.


Thinking I should have stuck with my 15yr old boiler - problem free, when it worked :P

macman

What speed is the pump set to? Try turning it down one notch if on 2 or 3.
But sounds as if the whole system needs rebalancing.

Dieselman

Tap the TRV next time it does it tap it with a wrench see if it stops, failing that fit a new one £12.00 cheap enough.

Milo19

macman wrote: »

What speed is the pump set to? Try turning it down one notch if on 2 or 3.
But sounds as if the whole system needs rebalancing.

Ok - Wheres the pump?? is it inside the boiler??

Dieselman wrote: »

Tap the TRV next time it does it tap it with a wrench see if it stops, failing that fit a new one £12.00 cheap enough.

If it stops, what does that mean? They maybe cheap, but having never drained a system and then re-filled its a little daunting!

It started with one making the noise, now that ones off and another has started!!!

Dieselman

At the lowest point say a lower floor radiator you connect a hose pipe to the leak off tap and then open it to release the water from the radiators, help it along by undoing the bleed screw from upstairs.

You will only need to drain out enough for the upstairs rads if these are the ones your changing, you will know if enough as come out when you crack off the pipe if no water comes out.:D

If this is all a bit much find a bloke who can or a plumber.

Milo19

Ok - the kitchen rad is the one people have used previously to drain the system so can use that.

I may as well do all the old ones as the system is drained, correct? accept the towel rail?

Any recommendations on what TRV?

Finally, disconnect hose pipe, close bleed valves and refill? Assuming I then put the inhibitor in through one of the rads? if so, how much?

macman

The pump is either within the boiler enclosure, ot elsewhere on the CH circuit.
If you cannot identify a CH pump, then you are not competent to be doing this work.

G_M

Pump is often in airing cupboard if you have a hot water cylinder there. Or is it a combi boiler?

Do not start draining water off at the base of the heating system (kitchen or wherever_ until you've closed off water supply at the top - or you'll be draining it for weeks!

Get a decent DIY manual to tell you how to do it, or use google. There are lots of online guides or even utube vids to show you how.

Dieselman

Milo.

Yes that is pretty much it.

TRV plenty of choices look at Plumb Centre not B&Q this is where the ones in the trade shop they will advise you best on what you may need and price etc.

Don't forget some PTFE tape for the threads.


Inhibitor approx 1 litre for 6 rads i put it in there with a syringe, then fill up the system better to have some help with you upstairs & the bleed screw wound out but not fully it can come gushing out, You will hear lots of air.

If your doing it solo then it just takes longer.:mad: