Noisey water Pipes

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Hi all

Hope you can help. Having an issue with my water pipes making a really loud humming noise when water is engaged. It seems to be worse first thing in the morning and wakes us all up when the tank wants to refill. I have emptied the system and it helped a little but the problem quickly returns.

Its odd as it was fine 6 months ago but now seems to have developed.

I can't seem to pin point what is causing it as its very random. I can run a tap and it makes the noise or even flush the toilet. The noise seems to come from the cold feed to the expansion tanks.

I'm not sure what the cause is and what I can potentially have checked/changed?

My set up is a water tank upstairs with a boiler down stairs.

Hope someone can help
 
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CBW

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Sounds like the washer in your ballvalve in the loft/upstairs tank. Get a new one or fit a new part 2 ballvalve.
 
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Hi

I dont have anything in the loft. What do you mean by ball valve. The tank is a saxton
 

CBW

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Do you have a check valve on the cold feed to the expansion tank(s) (as you call them)?

Edit: can only find a reference to SAXON and not SAXTON water tanks, which look like they're unvented! and they seem to be an Australian product!

Photos needed.
 
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Hi

sorry its a Santon Premier plus unvented water system. It has two expansion type tanks connected to it.

Thanks
 

CBW

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Are you sure it’s the unvented cylinder making the noise? Have you tried to isolate the cold feed into it? You mentioned it makes the noise flushing the toilet, but I doubt it’s connected.
 
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Unvented cylinder will not have an expansion tank... It will have an expansion "vessel". Upload photos but my thinking is now on inlet control group.
 
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So this is the system I have. Can anyone help me understand what could be at fault?
 
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Thanks for providing photos.
You have an unvented (UV) hot water cylinder and sealed central heating system.
It's not the tidiest of installs and there are at least a couple of issues with it as far as I can see in the photos.

You need a qualified engineer with a G3 ticket to make any adjustments to your system. Make sure you get someone who has this.
 
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Thanks for providing photos.
You have an unvented (UV) hot water cylinder and sealed central heating system.
It's not the tidiest of installs and there are at least a couple of issues with it as far as I can see in the photos.

You need a qualified engineer with a G3 ticket to make any adjustments to your system. Make sure you get someone who has this.

thanks for the input, i'll be sure to engage with someone who has a G3 certificate to get this fixed.

Would love to understand what you think that could be improved?
 
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Someone has mentioned that it could be the toilet flush valves and by changing these could resolve the issue?

What do you think?

Just don’t want to be ripped off by a plumber changing things for no reason
 
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Someone has mentioned to change the toilet flush mechanism as this could be the cause?

What does everyone think?
 

CBW

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I didn't say to change the flush valve, just trying to help eliminate the cause. If anything it would be the inlet valve, and usually makes the noise every flush/fill period
 
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