installing a mains water pressure reducting valve

[AlanRobins]

We live in a high water pressure area. Our 4-year old house has extensive plastic water piping - result :a very loud hum, heard throughout the house,that starts around 11.00 pm when water demand drops. Tried all the usual things like securing all loose piping and fixing an anti-vibration disc on the loft tank ball-cock. We have to turn off mains stopcock at night to get some sleep. I'm told the only 'cure' is to install a water reduction valve. Has anyone done this ? and with what results ? Would it be fitted before or after the mains stopcock ?
Any thoughts appreciated.

 

[Agile]

Fit after the stopcock set to about 3 Bar and add a pressure release valve set at 3.5 Bar after it.

Tony

 

[AlanRobins]

Tony
Thanks.

Any recommended manufacturers ?

Alan

 

[hazbrand]

Sorry to hijack your post.

I recently fitted a pressure reducing valve to our mains supply. Reduced from 6 bar to 4 for a venturi shower. What's the idea of the pressure release valve?

 

[kevplumb]

in case the reducing valve fails

 

[ChrisR]

Before you do that, check all the float operated valves in the house. Sometimes they hum. Changing the washer ususally cures them. If you lift the float a bit the noise will stop.

 

[HarrogateGas]

Why fit a pressure releif valve after the pressure reducing valve??


Surely if the pressure reducing valve fails the worst that can happen is you go back to a high mains pressure as before and you know to replace the pressure reducing valve as its faulty? Seems daft to me.

 

[Nige F]

Anti vibe disc might as well be used for a frizbee get a proper equilibrium ballvalve in brass