Plumbing for toilet and american fridge freezer

[Sard]

Hi all,

I am doing some of the initial plumbing for a new understairs toilet to go in and finally plumbing in my american style fridge freezer. I plan to take a cold feed the 22mm mains that comes into the house and runs through my first floor ceiling cavity. I am comfortable turning off the mains etc. I wanted to ask if I should consider putting a pressure reducing valve when I tee off from the 22mm as I have very high mains pressure and I wanted to reduce the noise of the toilet cistern filling up through the pipes. I'm planning to run a 15mm from the 22mm and then tee off to the fridge freezer before it feeds the toilet.

I'd appreciate any comments or advice on this approach.

 

[Madrab]

You need to know what the pressure is before deciding whether it needs reduced or not, anything below 3 then I wouldn't worry about it. Modern Toilet fill valves have removeable inserts that delay start/reduce flow & pressure when the mains pressure is high, not sure if yours will have that or not. Worth checking.