Poor flow from all cold taps...

Joined
28 Feb 2025
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Hello,

The water company replaced pipework at my meter yesterday - there was a leak there. They found the stop tap was linked to an older tap, so took the old one out and put a length of new plastic piping in, connecting to the copper pipe running under my drive to the house. All looks fine.

I expected there to be an improvement in flow. Usual flow is poor, probably because of the copper pipe on my side, with flow being 7.5L a minute in the house but 23L at the meter. But it has got worse. Now more like 5L per minute from all cold taps (apart from back garden tap oddly, which is always higher). The hot water flows more normally.

When I initially ran the kitchen tap after the work was finished, the flow did indeed seem a little better than before. It then did the expected spluttering as air came out and then there was some dirty water. It then went to the worse flow which has been experienced since. 5L per minute.

I've tried turning stop cock off and on numerous times. And done same at the meter. I've run the taps for a while, no help. Water company came out to check the work they'd done earlier, still exposed, which appears fine. Aerators checked. I have a combi boiler.

The fact it is all the cold taps in the house and that the hot water runs more normally suggests to me that something has got into the cold supply line. How will I fix this? Or is it something else?

Thanks
 
Test flow from washing machine tap.
Disconnect pipe from washing machine and fill bucket. If you get a good flow rate then I'd be looking at tap replacement
 
Can you disconnect what they've done and then fashion up something to flow backwards eg from one of your taps towards their work, flush out whatever they've managed to get stuck into the pipework?
 

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