On 13/02/18 21:48, Tim Lamb wrote:
For various reasons I have ended up with 3 incoming mains water feeds.
Rather than fit lots of pressure regulators, is there any reason why I
cant fit one on the house side of the water meter?
25mm blue poly but there are 3.4" BSP versions and pipe adaptors.


I recommend the Caleffi series:

http://www.altecnic.co.uk/plumbing-h...ducing-valves/

I tried mine with the outlet direct into a bucket, 22mm, at around 3-4
bar and it did not seem to restrict water flow (got 50l/m).

Obviously a lower pressure will eventually drop the flow rate once into
yards of ongoing pipework, but it was nice to know the PRV was not
acting as a significant bottleneck.

In message , Tim Watts
writes
On 13/02/18 21:48, Tim Lamb wrote:
For various reasons I have ended up with 3 incoming mains water feeds.
Rather than fit lots of pressure regulators, is there any reason why
I cant fit one on the house side of the water meter?
25mm blue poly but there are 3.4" BSP versions and pipe adaptors.


I recommend the Caleffi series:

http://www.altecnic.co.uk/plumbing-h...ducing-valves/

I tried mine with the outlet direct into a bucket, 22mm, at around 3-4
bar and it did not seem to restrict water flow (got 50l/m).

Obviously a lower pressure will eventually drop the flow rate once into
yards of ongoing pipework, but it was nice to know the PRV was not
acting as a significant bottleneck.

Nice.

The main run before Teeing off is about 20m. I had not considered pipe
flow losses though so perhaps this is not such a good idea. Fresh water
to kitchen sink does not need one anyway.

--
Tim Lamb

On 14/02/18 14:50, Tim Lamb wrote:
In message , Tim Watts
writes
On 13/02/18 21:48, Tim Lamb wrote:
For various reasons I have ended up with 3 incoming mains water feeds.
Rather than fit lots of pressure regulators, is there any reason why
IÂ* cant fit one on the house side of the water meter?
25mm blue poly but there are 3.4" BSP versions and pipe adaptors.


I recommend the Caleffi series:

http://www.altecnic.co.uk/plumbing-h...ducing-valves/

I tried mine with the outlet direct into a bucket, 22mm, at around 3-4
bar and it did not seem to restrict water flow (got 50l/m).

Obviously a lower pressure will eventually drop the flow rate once
into yards of ongoing pipework, but it was nice to know the PRV was
not acting as a significant bottleneck.

Nice.

The main run before Teeing off is about 20m. I had not considered pipe
flow losses though so perhaps this is not such a good idea. Fresh water
to kitchen sink does not need one anyway.


Depends on what your out going pressure will be set to.

3-4 bar still moves quite a lot of water through a longish bit of 15mm
pipe without being annoying like 7.5 bar is (eg vicious splashback from
the sink due to tap acting like a pressure washer