bang noise in radiators

J

Joe123

Messages

11

• Mar 19, 2023

• #1

My radiators make a bang noise every now and then. Doesn't seem to be a particular radiator instead it will be 1 radiator and then some time later another radiator and then some time later another. Only 1 at a time I think. At least I think this is what's going on.

By way of background; I have a newly installed modern combi boiler (Worcester with digital screen), newly installed plumbing/piping (white plastic with pushfit except for copper pipes where pipes are visible and near boiler) and all new radiators in the house (7 rads in 3 bed semi). 2 of the radiators are leaking a little unfortunately. I think 1 of the radiators also doesn't heat up that much towards the bottom of the rad.

As regards the banging sound... Is it sludge? Does it need flushing? Any ideas?

Boiler pic below

 

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Last edited: Mar 19, 2023

gmartine

Esteemed

Gas Engineer

Messages

2,363

• Mar 19, 2023

• #2

Make a note of all the faults (when and where) and call the installers back to resolve them, a new system shouldn't need flushing. The moving noise is odd unless it's a slug of air moving around the system and or the plastic pipe work has been insufficently clipped.

 

P

PETE 123

Messages

692

• Mar 19, 2023

• #3

Reverse flow on thermostatic rad valves if fitted could be a cause.

 

E

Enthalpy

Messages

37

• Mar 19, 2023

• #4

Plastic Bracket Buffers missing?

Spare Plastic Anti-Vibration Inserts For Compact Radiator Brackets, Pack Of 10 - https://www.mrcentralheating.co.uk/spare-anti-vibration-plastic-inserts-for-compact-radiator-brackets

 

J

Joe123

Messages

11

• Mar 20, 2023

• #5

See attached video with sounds

 

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• 20230319_131754_1.mp4

  10.8 MB

SimonG

Esteemed

Plumber

Subscribed

Messages

21,026

• Mar 20, 2023

• #6

Do you have all trv's and do you have an auto bypass?

 

J

Joe123

Messages

11

• Mar 20, 2023

• #7

SimonG said:

Do you have all trv's and do you have an auto bypass?

Click to expand...

Yes Trvs on all rads. Don't know what an auto bypass is or whether there is 1. The plumbers gone awol too so I can't ask him. Any advice?

 

E

Enthalpy

Messages

37

• Mar 20, 2023

• #8

You can use a flash light and small mirror to check whether Plastic Bracket Buffers (Post #4) are fitted in accordance with the radiator installation instructions.

 

SimonG

Esteemed

Plumber

Subscribed

Messages

21,026

• Mar 20, 2023

• #9

Joe123 said:

Yes Trvs on all rads. Don't know what an auto bypass is or whether there is 1. The plumbers gone awol too so I can't ask him. Any advice?

Click to expand...

Take the head off of one of the thermostatic radiator valves.

 

J

Joe123

Messages

11

• Mar 21, 2023

• #10

SimonG said:

Take the head off of one of the thermostatic radiator valves.

Click to expand...

And then?

 

J

Joe123

Messages

11

• Mar 21, 2023

• #11

SimonG said:

Do you have all trv's and do you have an auto bypass?

Click to expand...

It's a digital screen modern worcester combi boiler. Don't think you need trvs for combi?

 

J

Joe123

Messages

11

• Mar 24, 2023

• #12

Enthalpy said:

You can use a flash light and small mirror to check whether Plastic Bracket Buffers (Post #4) are fitted in accordance with the radiator installation instructions.

Click to expand...

They're not on all the rads. So its metal on metal. Could this truly be the cause of the sound? Is that what the sound in the video sounds like?