Loud toilet filling

[iwaters]

I have a newish house (buit 1997), it has no water tank in the loft and so the upstairs is mains fed. When you flush the toilet it sounds like the cistern is being filled with a hose pipe and wakes the kids up sometimes.

I haven't had the water pressure tested but I know it is high (compared to what I have had previously). Is there anything I can fit to reduce the pressure and thus the noise?

Cheers

 

[muggles]

You could fit a pressure reducing valve to the incoming mains, or to just the toilet if you prefer. Alternatively get a quiet fill valve such as a Fluidmaster, this should reduce the noise dramatically

 

[iwaters]

Thanks for the reply. I don't want to reduce the pressure overall because it is useful for baths / showers etc. So I think I will get a couple of those Fluidmaster quiet fill valves.

Cheers

 

[Morris40]

The other option would be to fit a ball o fix isolation valve to the toilet cold supply and turn the screwdriver head to reduce the flow to the toilet, this will only cost a couple of quid, you may already have them fitted

 

[foxhole]

The other option would be to fit a ball o fix isolation valve to the toilet cold supply and turn the screwdriver head to reduce the flow to the toilet, this will only cost a couple of quid, you may already have them fitted

This won't reduce the pressure.

 

[husker199]

will reduce flow as stated...

 

[Bankrupt]

The other option would be to fit a ball o fix isolation valve to the toilet cold supply and turn the screwdriver head to reduce the flow to the toilet, this will only cost a couple of quid, you may already have them fitted

This won't reduce the pressure.

It will reduce the pressure downstream of the valve once you get flow - Basic physics....

The reduced pressure is why you get reduced flow. Simples if you know what you're talking about....

 

[mysteryman]

Now guys, no bitching, please!

Partial closure of the isolating valve will reduce the flowrate and therefore the downstream pressure.

I have fitted Torbeck valves to my bogs for the same reason.

 

[Bankrupt]

Now guys, no ****, please!

Partial closure of the isolating valve will reduce the flowrate and therefore the downstream pressure.

I have fitted Torbeck valves to my bogs for the same reason.

You've got it a**e about face.

As I have already stated, it is the pressure drop across the isolating valve ( once you have flow ) that reduces the pressure downstream and therefore the flowrate. Flow between two points on a length of pipe depends on the difference in pressure between the two points.

If there was no flow there would be no pressure drop. (i.e. full pressure downstream of the valve) Any yet you believe that reducing the flowrate reduces the downstream pressure ? .

 

[foxhole]

Narrow a pipe and it increases pressure, basic physics.

 

[JohnD]

wrong

it does however increase velocity (hence noise) through the constriction, and will reduce flow.

just think if you have a pipe filled at 30bar, the pressure will be at 30bar throughout the pipe.

 

[husker199]

yes John D but would that not be the standing pressure??

 

[JohnD]

the pressure will not be increased by narrowing the pipe.

 

[Bankrupt]

Narrow a pipe and it increases pressure, basic physics.

Totally wrong. You clearly have no knowledge of even basic physics. .

It never ceases to amaze me how people who so obviously know nothing about the topic under discussion post such nonsense on threads ....

 

[Bankrupt]

just think if you have a pipe filled at 30bar, the pressure will be at 30bar throughout the pipe.

If a pipe is pressurised to 30bar at one end and has no flow through it, then the pressure will be at 30 bar throughout the pipe. If there is flow the pressure will be lower than 30bar downstream of any restrictions. If both ends of the pipe were at 30 bar there would be no flow - It is pressure difference that drives flow through a pipe.