Hello
I recently had to replace the 25 year old ball valve in my header tank due to it not shutting off fully. The new valve shuts off ok but generates a very high pitched whistling when the tank is filling which is quite irritating at night when someone has had a shower.
One difference I've noticed is that water exited the old valve from its underside, whilst water exits upwards from the new valve and is diverted back down via a short plastic tube. Apparently this is required by new regulations? I've tried playing with the water pressure and I've also tried fitting a rubber tube to the valve but neither of these measures has much effect.
Can someone recommend a silent ball-valve or is this a problem they all have?
Thanks Thomas