Water rattling in pipes since heating balanced

allycavs

Hi
I had few jobs done recently on the heating (added magna cleaner, system had a chemical flush and heating balanced). Since then water is rattling in pipes (upstairs only - i dont think its rattling in the radiator but at pipes). Ive bled rads but noise is continuing. Is there any other checks i can do myself before having to call someone to check it out.
Thanks
Alan

Thanks
Alan

Wearb

You sure it's not the sound of radiator expanding in the radiator brackets, now that they are probably getting hotter than before.

allycavs

no its the sound of water running through pipes and what i imagine is the rads that are closest to boiler (upstairs) are barely open now (cracked as the plumber put it) and the water trying to force through and hitting off a tighter opening. All down stairs rads were opened up more with the further rad fully open.

it possibly even sounds up like freed up hard bits of debirs hitting off metal after a chemical clean ?

Wearb

You could see if your circulating pump can be turned down. Ask your plumber first.
It could be residue left in the system after the chemical flush. Power flush would have been more thorough.

allycavs

I ave limited down the noise two 2 radiators. and the noise is coming from the valvues around the inlet side as opposed to return. I tried opening up valve and this made no difference so what ever. I also bled the pump and every radiator. any other suggestions what this could be?

K.Flyer

Do you have thermostatic rad valves (TRVs) on these radiators.

Dtp1979

Op you basically wasted your money paying some chancer to "chemically flush" your system. If your "plumber" was a professional then he would have powerflushed it. Because the plumber did such a poor job in the first place, he now has to over restrict the water flow to some rads in order to get others working because they're not properly cleaned. This is why you're getting the noise I'd say.

allycavs

K.Flyer: No TRVs on my rad

Dtp1979: That makes sense. With type of system I have allegedly power flush wouldn't be good idea and may damage system

I played round with valves today and I think ive improved it by opening up valve more.

My house is older. Extension was built before i ever bought it. extension has 3 rads which is been fed off on quarter inch pipes and the tighter flow into this pipe isnt feeding furthest rad(kitchen). This is why flow was restricted with the 2 rads upstairs in particular.

This rad never heated since i lived here and is heating now.so the over restriction is causing a trickle like sound which was my hunch.

Sleeper12

Chemical flush obviously isn't anywhere near as good as a power flush but even if you settle on a chemical flush it is supposed to be left in the system for 2 weeks before flushing.

Dtp1979

allycavs wrote: »

K.Flyer: No TRVs on my rad

Dtp1979: That makes sense. With type of system I have allegedly power flush wouldn't be good idea and may damage system

I played round with valves today and I think ive improved it by opening up valve more.

My house is older. Extension was built before i ever bought it. extension has 3 rads which is been fed off on quarter inch pipes and the tighter flow into this pipe isnt feeding furthest rad(kitchen). This is why flow was restricted with the 2 rads upstairs in particular.

This rad never heated since i lived here and is heating now.so the over restriction is causing a trickle like sound which was my hunch.

Powerflushing doesn't damage systems. That's a myth bad plumbers who do chemical flushes tell you

allycavs

Sleeper12: chemicals were in for a month.

Dtp1979: so get a power flush for this noise or open up valves?

Dtp1979

allycavs wrote: »

Sleeper12: chemicals were in for a month.

Dtp1979: so get a power flush for this noise or open up valves?

Get a decent plumber to diagnose first