Pipe Sounding Like Fog Horn...Please help

[chsskg]

Hi,

Hope someone can help me. Whenever I flush the toilet I get a loud droning sound which only stops as the cistern becomes refilled, so it lasts a good 30 secs or so. I can feel the floor resounding slightly with the sound and the only way i can stop it is to turn on the water tap at the sink next to the toilet.This stops the noise but if i turn off the tap the noise comes back until the cistern is filled. Please can someone tell me what is causing this and what I can do to stop it. The noise has got dteadily worse and louder over the last few weeks.

Many thanks in advance,

Chris

 

[taydo]

if it has only just started.
it sounds like the ball valve in the cistern is faulty its called water hammer
whats happening is the valve is opening and closing very fast causing the water to hammer on the valve and vibrate the pipes, when you turn on the tap you lower the pressure going to the valve.

if it has done this from new you have a low pressure valve in the cistern

 

[MimiJane]

We had this problem throughout our house, i.e. whenever a tap was turned on, washer on, toilet flushed, etc. The noise is probably caused by the volume of water being too high as it goes through the pipes. We thought about a logical solution to this problem and tried turning the water pressure down. It worked and all we had to do then was turn it down a little at a time so the pressure was still OK, but the noise had gone. Try this ... it could well work.

 

[kevplumb]

We thought about a logical solution to this problem and tried turning the water pressure down.

and how did you manage that

 

[doitall]

Change the plastic ball valve = problem solved

 

[ChrisR]

Usually all is fine if you just change the ball valve washer.

 

[Nige F]

turn the washer round.back to front checkmate

 

[olly_k]

We thought about a logical solution to this problem and tried turning the water pressure down.

and how did you manage that

Did he mean to say that by partially closing the tap he reduced 'flow rate'?

 

[bab]

It is with out dout the ballvalve washer that has now got an indent in it causing the water to scream & jump as its shutting off . But if its a diaphram part 2 ball valve u cant turn it around it will need replacing. Its good practice to chage the orrifice at the same time . There pence.

 

[micky p]

a Torbek float valve should solve your problem. they come with a spiral type defuser so that it takes most of the energy out of the water flow and they fill really quitely too.

 

[bab]

Oh yes got to agree with that , I carry torbecks & Fluid masters & there a real fix . It all depends how deep u want to get into the job if its a bottom fed ballvalve.
______________________________
Lynda, moderator

locked to prevent hi-jacking