Having just had a delivery from www.bes.co.uk including some 10mm
copper piping etc I had an awful thought when looking at the pipe so
went to look at the rad in the bathroom which I am renovating at
present .I then went to look at all the other rads and what I have
found is that ,contrary to my belief that the system was in 10mm ,it
is a mixture of 10 and also 8mm .The rads in the hall,kitchen and one
in the living room are in 10mm and the bathroom,both bedrooms and the
other living room one are in 8mm .

Could there be a logical reason for this being done deliberately .

I don't know how I didn't notice this before .I'm sure I replaced a
reducer before when I renewed a valve or two and used the new cap(s)
so had to remove the reducer and I don't remember buying 15 to 8
reducers ...but then again,maybe I didn't replace them and just sawed
off the olives to get the old cap off ...
Aaargh...FFS

Stuart

In an earlier contribution to this discussion,
Stuart wrote:

The rads in the hall,kitchen and one
in the living room are in 10mm and the bathroom,both bedrooms and the
other living room one are in 8mm .

Could there be a logical reason for this being done deliberately .

Assuming that you have individual feeds to each rad from a manifold, it
sounds as if they have used an appropriate pipe size depending on the
capacity of each rad. Presumably 8mm is cheaper. Why use 10mm when 8mm will
do?

I must admit that it sounds a bit penny pinching!
--
Cheers,
Roger
______
Please reply to newsgroup.
Reply address IS valid, but not regularly monitored.

On Wed, 05 Apr 2006 16:53:34 +0100, Stuart
wrote:

Having just had a delivery from www.bes.co.uk including some 10mm
copper piping etc I had an awful thought when looking at the pipe so
went to look at the rad in the bathroom which I am renovating at
present .I then went to look at all the other rads and what I have
found is that ,contrary to my belief that the system was in 10mm ,it
is a mixture of 10 and also 8mm .The rads in the hall,kitchen and one
in the living room are in 10mm and the bathroom,both bedrooms and the
other living room one are in 8mm .

Could there be a logical reason for this being done deliberately .

I don't know how I didn't notice this before .I'm sure I replaced a
reducer before when I renewed a valve or two and used the new cap(s)
so had to remove the reducer and I don't remember buying 15 to 8
reducers ...but then again,maybe I didn't replace them and just sawed
off the olives to get the old cap off ...
Aaargh...FFS

Stuart

Sorry to hear about the problem but I was just about to start
modifying what I took to be a number of 10mm radiator tails. Now I'm
going to check carefully before ordering the materials. Thanks for the
warning.
--
Regards,
Mike Halmarack

Drop the (EGG) to email me.

On Wed, 05 Apr 2006 16:53:34 +0100, Stuart wrote:

Having just had a delivery from www.bes.co.uk including some 10mm
copper piping etc I had an awful thought when looking at the pipe so
went to look at the rad in the bathroom which I am renovating at
present .I then went to look at all the other rads and what I have
found is that ,contrary to my belief that the system was in 10mm ,it
is a mixture of 10 and also 8mm .The rads in the hall,kitchen and one
in the living room are in 10mm and the bathroom,both bedrooms and the
other living room one are in 8mm .

Could there be a logical reason for this being done deliberately .

I don't know how I didn't notice this before .I'm sure I replaced a
reducer before when I renewed a valve or two and used the new cap(s)
so had to remove the reducer and I don't remember buying 15 to 8
reducers ...but then again,maybe I didn't replace them and just sawed
off the olives to get the old cap off ...
Aaargh...FFS


This is quite common on microbore systems. I presume that the idea is that
bigger and further rads are given a bigger/wider supply and vice versa.
The intention being to make the system better balanced by installation.

Note that you may find that 8mm fits snugly into 10mm pipe and can be
soldered without additional fittings.


--
Ed Sirett - Property maintainer and registered gas fitter.
The FAQ for uk.diy is at http://www.diyfaq.org.uk
Gas fitting FAQ http://www.makewrite.demon.co.uk/GasFitting.html
Sealed CH FAQ http://www.makewrite.demon.co.uk/SealedCH.html
Choosing a Boiler FAQ http://www.makewrite.demon.co.uk/BoilerChoice.html

On Wed, 05 Apr 2006 20:16:43 +0100, Ed Sirett
wrote:

On Wed, 05 Apr 2006 16:53:34 +0100, Stuart wrote:

Having just had a delivery from www.bes.co.uk including some 10mm
copper piping etc I had an awful thought when looking at the pipe so
went to look at the rad in the bathroom which I am renovating at
present .I then went to look at all the other rads and what I have
found is that ,contrary to my belief that the system was in 10mm ,it
is a mixture of 10 and also 8mm .The rads in the hall,kitchen and one
in the living room are in 10mm and the bathroom,both bedrooms and the
other living room one are in 8mm .

Could there be a logical reason for this being done deliberately .

I don't know how I didn't notice this before .I'm sure I replaced a
reducer before when I renewed a valve or two and used the new cap(s)
so had to remove the reducer and I don't remember buying 15 to 8
reducers ...but then again,maybe I didn't replace them and just sawed
off the olives to get the old cap off ...
Aaargh...FFS


This is quite common on microbore systems. I presume that the idea is that
bigger and further rads are given a bigger/wider supply and vice versa.
The intention being to make the system better balanced by installation.

Note that you may find that 8mm fits snugly into 10mm pipe and can be
soldered without additional fittings.

Ths Ed ...What you say might explain me using 15-10 reducers on 8 mm
pipe and it working OK ....Funny bit is that the bathroom is the
furthest room from the boiler and also from the manifold which is in
the hall and it is one of the rads that uses 8mm ....it is also the
second largest rad at 600 x 1100 ,the largest is 600 x 1300 which uses
10mm ....as someone else said it does sound a bit mean ...why not just
use all 10mm .
Stuart

On Wed, 05 Apr 2006 18:07:09 +0100, Roger Mills wrote:

In an earlier contribution to this discussion,
Stuart wrote:

The rads in the hall,kitchen and one
in the living room are in 10mm and the bathroom,both bedrooms and the
other living room one are in 8mm .

Could there be a logical reason for this being done deliberately .

Assuming that you have individual feeds to each rad from a manifold, it
sounds as if they have used an appropriate pipe size depending on the
capacity of each rad. Presumably 8mm is cheaper. Why use 10mm when 8mm will
do?

I must admit that it sounds a bit penny pinching!

But it's quite common, IME

"Stuart" wrote in message
...
Having just had a delivery from www.bes.co.uk including some 10mm
copper piping etc I had an awful thought when looking at the pipe so
went to look at the rad in the bathroom which I am renovating at
present .I then went to look at all the other rads and what I have
found is that ,contrary to my belief that the system was in 10mm ,it
is a mixture of 10 and also 8mm .The rads in the hall,kitchen and one
in the living room are in 10mm and the bathroom,both bedrooms and the
other living room one are in 8mm .

Could there be a logical reason for this being done deliberately .


(In this post) you haven't given a date for when you believe the system was
installed; but IIRC during the mid-seventies ~ early-eighties there was
great difficulty obtaining copper tubing. My BCO advised me to install ABS
(Poly-York) piping for my cold-water services and scrutinised the tubing
specified for the CH circuitry. There was a strong incentive from the
Government to minimize tubing sizes. My CH is a two-pipe system that starts
off as 22mm; then reduces to 15mm finally reducing to 10mm as
the 'load' decreases: Each radiator is fed with either 10mm or 8mm pipes as
the surface area dictates.

To paraphrase; - There _Could_ be a logical reason for this being done
deliberately
it might have something to do with Belgian Paratroopers dropping into Zaire!

--

Brian

On Thu, 06 Apr 2006 10:36:03 GMT, "Brian Sharrock"
wrote:


"Stuart" wrote in message
.. .
Having just had a delivery from www.bes.co.uk including some 10mm
copper piping etc I had an awful thought when looking at the pipe so
went to look at the rad in the bathroom which I am renovating at
present .I then went to look at all the other rads and what I have
found is that ,contrary to my belief that the system was in 10mm ,it
is a mixture of 10 and also 8mm .The rads in the hall,kitchen and one
in the living room are in 10mm and the bathroom,both bedrooms and the
other living room one are in 8mm .

Could there be a logical reason for this being done deliberately .


(In this post) you haven't given a date for when you believe the system was
installed; but IIRC during the mid-seventies ~ early-eighties there was
great difficulty obtaining copper tubing. My BCO advised me to install ABS
(Poly-York) piping for my cold-water services and scrutinised the tubing
specified for the CH circuitry. There was a strong incentive from the
Government to minimize tubing sizes. My CH is a two-pipe system that starts
off as 22mm; then reduces to 15mm finally reducing to 10mm as
the 'load' decreases: Each radiator is fed with either 10mm or 8mm pipes as
the surface area dictates.

To paraphrase; - There _Could_ be a logical reason for this being done
deliberately
it might have something to do with Belgian Paratroopers dropping into Zaire!

Don't know exactly Brian but I moved here in 1984 and it was here then
..

Stuart ..