Hi,

I'm currently preparing to have my current domestic heating/plumbing
system replaced and will be using a combi boiler. I have almost
everything sorted out, but I can't find any info on what to do with
the relief valve pipework.

Can I use the existing hot water tank vent pipework for this relief,
or do I have to run new pipework direct into a drain and if so, can I
use the existing bathroom drainage system to vent into?

Many thanks in advance for your advice.
--
Andy

"Andy" wrote in message
om...
Hi,

I'm currently preparing to have my current domestic heating/plumbing
system replaced and will be using a combi boiler. I have almost
everything sorted out, but I can't find any info on what to do with
the relief valve pipework.

It must be copper and terminated outside at low level, typically a few
inches from ground level. There must be an elbow on the end of the pipe to
direct any discharge against the wall. The pipe does not have to be sleeved
running through a wall.

(Andy) wrote in message . com...

I'm currently preparing to have my current domestic heating/plumbing
system replaced and will be using a combi boiler. I have almost
everything sorted out, but I can't find any info on what to do with
the relief valve pipework.

Can I use the existing hot water tank vent pipework for this relief,
or do I have to run new pipework direct into a drain and if so, can I
use the existing bathroom drainage system to vent into?

That's really spooky as I was just about to ask almost the same
question! I have just had an Ideal Standard C24 combi installed, and
I notice that the plumber has installed this pipe so that it sticks
out of the outside wall, about 15 feet above the pavement.

I checked the installation manual; it states:

"SAFETY VALVE DRAIN
The discharge pipe should be positioned so that the discharge of water
or steam cannot create a hazard to the occupants of the premises"

That's all it says. (This is on page 17 of the manual, which is at:
http://www.idealboilers.com/pdf/mini%20inst%20serv.pdf)

Curiously the instructions don't seem to be concerned about possibly
creating a hazard to passers-by! I think the plumbers's installed it
incorrectly; am I right? How should it be done? The boiler's
installed in a bedroom cupboard by the way, on an outside wall;
nowhere near any drains etc.

David

On Sun, 20 Jun 2004 11:45:59 -0700, Andy wrote:

Hi,

I'm currently preparing to have my current domestic heating/plumbing
system replaced and will be using a combi boiler. I have almost
everything sorted out, but I can't find any info on what to do with
the relief valve pipework.

Can I use the existing hot water tank vent pipework for this relief,
or do I have to run new pipework direct into a drain and if so, can I
use the existing bathroom drainage system to vent into?

Many thanks in advance for your advice.
--
Andy

Much info in the SealCH FAQ.


--
Ed Sirett - Property maintainer and registered gas fitter.
The FAQ for uk.diy is at 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

"Lobster" wrote in message
m...
(Andy) wrote in message
. com...

I'm currently preparing to have my current domestic heating/plumbing
system replaced and will be using a combi boiler. I have almost
everything sorted out, but I can't find any info on what to do with
the relief valve pipework.

Can I use the existing hot water tank vent pipework for this relief,
or do I have to run new pipework direct into a drain and if so, can I
use the existing bathroom drainage system to vent into?

That's really spooky as I was just about to ask almost the same
question! I have just had an Ideal Standard C24 combi installed, and
I notice that the plumber has installed this pipe so that it sticks
out of the outside wall, about 15 feet above the pavement.

I checked the installation manual; it states:

"SAFETY VALVE DRAIN
The discharge pipe should be positioned so that the discharge of water
or steam cannot create a hazard to the occupants of the premises"

That's all it says. (This is on page 17 of the manual, which is at:
http://www.idealboilers.com/pdf/mini%20inst%20serv.pdf)

Curiously the instructions don't seem to be concerned about possibly
creating a hazard to passers-by! I think the plumbers's installed it
incorrectly; am I right? How should it be done? The boiler's
installed in a bedroom cupboard by the way, on an outside wall;
nowhere near any drains etc.

David

"Lobster" wrote in message
m...
(Andy) wrote in message
. com...

I'm currently preparing to have my current domestic heating/plumbing
system replaced and will be using a combi boiler. I have almost
everything sorted out, but I can't find any info on what to do with
the relief valve pipework.

Can I use the existing hot water tank vent pipework for this relief,
or do I have to run new pipework direct into a drain and if so, can I
use the existing bathroom drainage system to vent into?

That's really spooky as I was just about to ask almost the same
question! I have just had an Ideal Standard C24 combi installed, and
I notice that the plumber has installed this pipe so that it sticks
out of the outside wall, about 15 feet above the pavement.

I checked the installation manual; it states:

"SAFETY VALVE DRAIN
The discharge pipe should be positioned so that the discharge of water
or steam cannot create a hazard to the occupants of the premises"

That's all it says. (This is on page 17 of the manual, which is at:
http://www.idealboilers.com/pdf/mini%20inst%20serv.pdf)

Curiously the instructions don't seem to be concerned about possibly
creating a hazard to passers-by! I think the plumbers's installed it
incorrectly; am I right? How should it be done? The boiler's
installed in a bedroom cupboard by the way, on an outside wall;
nowhere near any drains etc.

David

See my post on this.

"IMM" wrote in message
...

"Andy" wrote in message
om...
Hi,

I'm currently preparing to have my current domestic heating/plumbing
system replaced and will be using a combi boiler. I have almost
everything sorted out, but I can't find any info on what to do with
the relief valve pipework.

It must be copper and terminated outside at low level, typically a few
inches from ground level. There must be an elbow on the end of the pipe
to
direct any discharge against the wall.

I think this is one of the pre-cooked strings the IMMbot currently has in
its repertoire dictionary. I've seen a few PRD outlets terminate at high
level with an elbow to point them back at the wall, but IMHO and according
to the instructions on the various boilers I've fitted the corerct practice
is to terminate a few inches above ground level but directed straight down.
(If it's pointed back at the wall there's more chance of it spraying out
everywhere when teh pressure relief valve blows off.)


The pipe does not have to be sleeved
running through a wall.

For all copper pipework it's good practice (and may be mandated in various
regs) to sleeve them where they pass through masonry walls to prevent
corrosion.

"John Stumbles" wrote in message
...
"IMM" wrote in message
...

"Andy" wrote in message
om...
Hi,

I'm currently preparing to have my current domestic heating/plumbing
system replaced and will be using a combi boiler. I have almost
everything sorted out, but I can't find any info on what to do with
the relief valve pipework.

It must be copper and terminated outside at low level, typically a few
inches from ground level. There must be an elbow on the end of the pipe
to
direct any discharge against the wall.

I think this is one of the pre-cooked
strings the IMMbot currently has in
its repertoire dictionary.

It is also in CORGI's too. You will fail the test if you don't answer as I
told you. You can terminate directly down onto a flat roof with no access.
having the pipe directly out is a no, no.

I've seen a few PRD outlets terminate at high
level

Just take note of what I write and stop trying to be a know-it-all.

"IMM" wrote in message
...
Just take note of what I write and stop trying to be a know-it-all.
LMFAO, superb

On Tue, 22 Jun 2004 22:16:59 +0100, "IMM" strung
together this:

Just take note of what I write and stop trying to be a know-it-all.

I think that has to go in the 'IMM quote of the month' file.
--

SJW
A.C.S. Ltd

"Lurch" wrote in message
...
On Tue, 22 Jun 2004 22:16:59 +0100, "IMM" strung
together this:

Just take note of what I write and stop trying to be a know-it-all.

I think that has to go in the 'IMM quote of the month' file.

Mr Pole,

Bean, than you.

"IMM" wrote in message ...

I'm currently preparing to have my current domestic heating/plumbing
system replaced and will be using a combi boiler. I have almost
everything sorted out, but I can't find any info on what to do with
the relief valve pipework.

It must be copper and terminated outside at low level, typically a few
inches from ground level. There must be an elbow on the end of the pipe to
direct any discharge against the wall. The pipe does not have to be sleeved
running through a wall.

Thanks for the info. I assume that if there is no route to ground
level (as is my case) I can terminate the pipe into a roof gully?
--
Andy

On Fri, 25 Jun 2004 09:55:23 -0700, Andy wrote:

"IMM" wrote in message ...

I'm currently preparing to have my current domestic heating/plumbing
system replaced and will be using a combi boiler. I have almost
everything sorted out, but I can't find any info on what to do with
the relief valve pipework.

It must be copper and terminated outside at low level, typically a few
inches from ground level. There must be an elbow on the end of the pipe to
direct any discharge against the wall. The pipe does not have to be sleeved
running through a wall.

Thanks for the info. I assume that if there is no route to ground
level (as is my case) I can terminate the pipe into a roof gully?
--

The boiler makers will no doubt specifiy what they wan in the
instructions.

If in doubt good practice would be safely and visibly.


--
Ed Sirett - Property maintainer and registered gas fitter.
The FAQ for uk.diy is at 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

"Ed Sirett" wrote in message
news
On Fri, 25 Jun 2004 09:55:23 -0700, Andy wrote:

"IMM" wrote in message
...

I'm currently preparing to have my current domestic heating/plumbing
system replaced and will be using a combi boiler. I have almost
everything sorted out, but I can't find any info on what to do with
the relief valve pipework.

It must be copper and terminated outside at low level, typically a few
inches from ground level. There must be an elbow on the end of the
pipe to
direct any discharge against the wall. The pipe does not have to be
sleeved
running through a wall.

Thanks for the info. I assume that if there is no route to ground
level (as is my case) I can terminate the pipe into a roof gully?
--

The boiler makers will no doubt specifiy what they wan in the
instructions.

Some do not.