Banging in pipes

[Tim2k9]

So recently, over the last couple of days, when we flush the toilet the pipes seem to rattle as it is been filled back up.

There's also been a slight leak in the bath tap for a while, which seems to get worse when the toilet is flushed.

Any idea or is it time for a plumber?

[PositronicRay]

Have you fitted a new ball cock recently? Sounds like water hammer.

[Tim2k9]

Haven't fitted a new ballcock, would this be the first place to look and fit a new one?

[grumpyscot]

We've never had water hammer before - and been in the house for 30 years. Even with new washing machine & dishwasher 5 years ago, no noise. Yet our next door neighbour extended his kitchen and installed new dishwasher & washing machine this year........... and every night about 9pm we hear water hammer. I asked him when they usually did their washing "Usually in the evening". "Would that be around 9pm" "Yes". So I told him what's happening and he discovered the wrong valve has been fitted to his washing machine and is now fighting his plumber & Supplier to get it corrected. Meanwhile, I've gone under the floor and added extra supports to my pipes to decrease the noise.

I await neighbours results!

[cbmotorsport]

He's fighting his plumber over a 20 minute job?

[PositronicRay]

Tim2k9 said:

Haven't fitted a new ballcock, would this be the first place to look and fit a new one?

Maybe your water pressure has been increased, you can get high and low pressure jobbies. Is it mains fed?

[dhutch]

Could just be its become a bit worn and unstable.

If you have an 1/4 turn isolator, turning it down just a bit might resolve the issue.

Leaking tap, live with it or fix it, its basically unrelated.


Daniel

[snobetter]

I had this, swapped the refill unit in the toilet, 20 min job plus you tube watching time, all sorted for about £10, after weeks of thinking there was an issue with the pipes...

[g7jtk]

New diaphragm washer in the float valve.
Does the plunger touch the arm when first flushed?

[bucksmanuk]

The water hammer off my toilet flush was epic, and I tolerated it for ages.
Play around with the isolator valve opening while it’s refilling, it should make it go away/reduce it.
I went to the local plumb centre with a picture of said loo and the internal mechanism stuff, and told the chap behind the counter what was happening, and he said "very common fault - you need one of these repair kits"
I bought the kit, shut the water off, drained the toilet cistern, fitted it, and problem solved. The kit was that cheap, I bought 2, so 1 is a spare. I think it took me 20 minutes to fit it.
I suspect the leak on the bath tap is just the tap washer coming to the end its useful life. The pressure spikes that are caused by water hammer are huge, if the washer is already leaking (albeit a small amount); high pressure is only going to make it worse. Happy to be proven wrong though!