i have a glow worm combi and the pressure gauge keeps going to 0.2 bar. The
plumber I spoke to says that the boiler I have should have a pressure of
between 1 and 2 bar. I used the refill tap to raise the pressure but after
a few minutes this goes back to 0.2-0.3bar. I then noticed outside by a
drain pipe hot water was coming out so I thought this is where the hot water
is going. How do I stop it from draining and maintain the pressure?
Thanks.

--
ian
to e-mail me,
pls. amend the obvious.

"i-ball" wrote in message
...
i have a glow worm combi and the pressure gauge keeps going to 0.2 bar.
The
plumber I spoke to says that the boiler I have should have a pressure of
between 1 and 2 bar. I used the refill tap to raise the pressure but
after
a few minutes this goes back to 0.2-0.3bar. I then noticed outside by a
drain pipe hot water was coming out so I thought this is where the hot
water
is going. How do I stop it from draining and maintain the pressure?
Thanks.

ian


The thing that's leaking outside is the systems drain down cock. Tighten it
up with a spanner, or even a pair of pliers, on the little square brass knob
until it stops dripping. Turn it the same way you turn a tap off. If it
continues dripping, then the washer inside has most likely perished and
needs replaced.

On Thu, 16 Dec 2004 16:58:51 +0000, i-ball wrote:

i have a glow worm combi and the pressure gauge keeps going to 0.2 bar. The
plumber I spoke to says that the boiler I have should have a pressure of
between 1 and 2 bar. I used the refill tap to raise the pressure but after
a few minutes this goes back to 0.2-0.3bar. I then noticed outside by a
drain pipe hot water was coming out so I thought this is where the hot water
is going. How do I stop it from draining and maintain the pressure?
Thanks.

See FAQ. Sounds like the pressure releif valve has gone. Which in turn
might be because the expansion vessel has failed.


--
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

"BigWallop" wrote in message
. ..

"i-ball" wrote in message
...
i have a glow worm combi and the pressure gauge keeps going to 0.2 bar.
The
plumber I spoke to says that the boiler I have should have a pressure of
between 1 and 2 bar. I used the refill tap to raise the pressure but
after
a few minutes this goes back to 0.2-0.3bar. I then noticed outside by a
drain pipe hot water was coming out so I thought this is where the hot
water
is going. How do I stop it from draining and maintain the pressure?
Thanks.

ian


The thing that's leaking outside is the systems drain down cock. Tighten
it
up with a spanner, or even a pair of pliers, on the little square brass
knob
until it stops dripping. Turn it the same way you turn a tap off. If it
continues dripping, then the washer inside has most likely perished and
needs replaced.


Thats a big assumption you made there about the bit outside being a drain
cock. You might be right but there again the pipe may be the safety valve
discharge. If it is passing water at a pressure of 0.2 bar then the safety
valve is faulty, however I would advise the OP to look up the sealed system
faq and try to determine if he has really got a faulty valve or if the real
fault lies in the expansion vessel.

"Ed Sirett" wrote in message
news
On Thu, 16 Dec 2004 16:58:51 +0000, i-ball wrote:

i have a glow worm combi and the pressure gauge keeps going to 0.2 bar.
The
plumber I spoke to says that the boiler I have should have a pressure of
between 1 and 2 bar. I used the refill tap to raise the pressure but
after
a few minutes this goes back to 0.2-0.3bar. I then noticed outside by a
drain pipe hot water was coming out so I thought this is where the hot
water
is going. How do I stop it from draining and maintain the pressure?
Thanks.

See FAQ. Sounds like the pressure releif valve has gone. Which in turn
might be because the expansion vessel has failed.



Thanks for pointing me to the FAQs. I think my problem is this:

"The relief valve will have a test knob on it that lets out water into the
discharge pipe. It is a bad idea to operate this as the slightest piece of
debris on the valve seat will cause the valve to dribble."

What can I do to remedy it? Would I need to replace the valve?

"i-ball" wrote in message
...
"Ed Sirett" wrote in message
news
On Thu, 16 Dec 2004 16:58:51 +0000, i-ball wrote:

i have a glow worm combi and the pressure gauge keeps going to 0.2
bar.
The
plumber I spoke to says that the boiler I have should have a pressure
of
between 1 and 2 bar. I used the refill tap to raise the pressure but
after
a few minutes this goes back to 0.2-0.3bar. I then noticed outside by
a
drain pipe hot water was coming out so I thought this is where the hot
water
is going. How do I stop it from draining and maintain the pressure?
Thanks.

See FAQ. Sounds like the pressure releif valve has gone. Which in turn
might be because the expansion vessel has failed.



Thanks for pointing me to the FAQs. I think my problem is this:

"The relief valve will have a test knob on it that lets out water into the
discharge pipe. It is a bad idea to operate this as the slightest piece of
debris on the valve seat will cause the valve to dribble."

What can I do to remedy it? Would I need to replace the valve?


Just to reply to my own quiery, I found the following statement from
another web site:

"

If the pressure is normal in the system and the relief is leaking, scale or
rust maybe trapped in the valve seat. Open the relief by lift the manual
lever and allow water to blow off. Quickly release the valve and let it snap
back, to reseal the valve. Replace the valve if the problem persist. Never
block the relief valve opening. If the water leak cannot be stop then pipe
the water to a drain until it can be repaired or shut down the boiler and
close the water feed. NEVER BLOCK THE RELIEF VALVE."