Noisy water pipes

MACKEM99

WIAWSNB said:

MACKEM99 said:

Not at home at moment.  Its a bit like car starting motor when engine doesnt start.

A pic of the inlet valve when you can would be good.

Is that under the the cistern.

bjorn_toby_wilde

Nope

The inlet valve (used to be referred to as a ballcock) is inside the cistern. It’s a ball valve in older cisterns but modern ones look more like a column with a float on it.  If you lift the lid you’ll see it.

From what you’re describing there’s a good chance this valve isn’t working properly.  It could be chattering or fluttering as it gets close to shutting and this can cause a surprising amount of noise to travel along the pipework.

FreeBear

MACKEM99 said:

We get a grating noise when water fills after loo flush.  Any ideas?

Fitted one of these -> https://www.screwfix.com/p/flomasta-bottom-entry-fill-valve-1-2-/312jn Has cut the noise of the cistern refilling to almost zero.

But back to @JuzaMum - Sounds like high pressure, so a PRV may help.

7l/min out of a kitchen mixer tap is not that unusual. They are often plumbed on on the last ~300mm with 8mm pipe, and the aerator will severely restrict flow. Either an external tap or the one on a bath is usually a better bet if you want to gauge maximum flow.

And stopcocks should always be backed off by a quarter turn (or more) from fully open. This helps to stop the little burgers from seizing up.

MACKEM99

Screwfix link says not found?  Not too sure if i want to search for anything for bottom entry?😂

bjorn_toby_wilde

Not without parental filters on 🤣

https://www.screwfix.com/p/flomasta-bottom-entry-flush-valve-pack/328jn

Try this link?

WIAWSNB

MACKEM99 said:

Screwfix link says not found?  Not too sure if i want to search for anything for bottom entry?😂

As btw says, it's the part inside the cistern. So, lid off, and click away, please. 

FreeBear

MACKEM99 said:

Screwfix link says not found?  Not too sure if i want to search for anything for bottom entry?😂

Fixed the link.

Don't worry about finding anything inappropriate by searching for bottom entry. Thanks to mommy.gov and their mandated over-18 age checks, the worst you are likely to find is dogs in wigs (or tights if you turn off the NSFW filter).

bjorn_toby_wilde

FreeBear said:

MACKEM99 said:

Screwfix link says not found?  Not too sure if i want to search for anything for bottom entry?😂

Fixed the link.

Don't worry about finding anything inappropriate by searching for bottom entry. Thanks to mommy.gov and their mandated over-18 age checks, the worst you are likely to find is dogs in wigs (or tights if you turn off the NSFW filter).

Don’t post a link to that please 🤣

WIAWSNB

JuzaMum said:

WIAWSNB said:

JuzaMum said:

Quick answer without testing the flow (I've just got up), it's more a harsh roar, my youngest child said 'it's like the sound of a tap but louder'. I believe the pipes are bare copper behind the plaster board

Update 7 litres per minute from the kitchen tap

Thanks.

Ok, so it's the usual noise of water flowing through a pipe, probably exacerbated by the turbulence from it passing through a tap or valve. Usually, when it's this noticeable, it's down to excessive water pressure, and a PRV - Pressure Reducing Valve - can help this a lot. 

However, your kitchen water flow is pitiful! Ok, 'flow' and 'pressure' are different things - you can have one high and the other low, but they are connected. 

It's possible that your kitchen tap is an 'eco' type with reduced flow, so doesn't represent what your incoming mains is like. Do you have a garden tap? Could you carry out the measuring test there too, please?

And, when the kitchen tap is on, does it appear 'forceful'? Any chance of stopping the flow with your thumb or palm?

Finally, does the sound vary depending on what tap is being used? Toilet being flushed? Shower being taken? 

Do you have a combi boiler? 

It's not easy to cover the kitchen tap due to the design, it's certainly not forceful. 
I will test the garden tap later.
Running the shower or bath seems to be the noisiest, toilet flushing doesn't seem to be noisy.
Yes, we have a combi boiler (new this year, but problem existed prior)

Any update, Juzamum?
Tested the garden tap? 
Since you have a combi, then all your cold taps will be from the mains, so how does your cold bath tap compare with your kitchen one - flow rates? And 'force'?