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UK diy (uk.d-i-y) For the discussion of all topics related to diy (do-it-yourself) in the UK. All levels of experience and proficency are welcome to join in to ask questions or offer solutions.

Leaking Hot Water Cylinder



 
 
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  #1  
Old November 18th 06, 07:59 PM posted to uk.d-i-y
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Posts: 5
Default Leaking Hot Water Cylinder

My open vented indirect hot water cylinder has developed a slight leak
around the top pipe connected to the coil heat exchanger. See here for a
pictu

http://tinypic.com/view/?pic=2zq776r

I presuming this will get progressively worse. Is this something that
can be repaired or will it be time for a new cylinder soon.
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  #2  
Old November 18th 06, 08:53 PM posted to uk.d-i-y
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Posts: 615
Default Leaking Hot Water Cylinder

Jeff Allen wrote:
My open vented indirect hot water cylinder has developed a slight leak
around the top pipe connected to the coil heat exchanger. See here for a
pictu

http://tinypic.com/view/?pic=2zq776r

I presuming this will get progressively worse. Is this something that
can be repaired or will it be time for a new cylinder soon.



You simply need to remake that joint. You don't even need to fully drain
down, just the coil. You should be able to shut off its feed from the
header tank, and if you're lucky there will be a drain cock somewhere.


--
Grunff
  #3  
Old November 18th 06, 09:13 PM posted to uk.d-i-y
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Posts: 5
Default Leaking Hot Water Cylinder

Grunff wrote:
Jeff Allen wrote:

My open vented indirect hot water cylinder has developed a slight leak
around the top pipe connected to the coil heat exchanger. See here for
a pictu

http://tinypic.com/view/?pic=2zq776r

I presuming this will get progressively worse. Is this something that
can be repaired or will it be time for a new cylinder soon.




You simply need to remake that joint. You don't even need to fully drain
down, just the coil. You should be able to shut off its feed from the
header tank, and if you're lucky there will be a drain cock somewhere.



Thanks for the advice but it's actually leaking around the coupling
that's integral to the cylinder, i.e. the bit that comes pre-fitted to
cylinder rather rather than compression joint.
  #4  
Old November 18th 06, 09:28 PM posted to uk.d-i-y
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Posts: 9,132
Default Leaking Hot Water Cylinder

On 2006-11-18 20:13:49 +0000, Jeff Allen said:

Grunff wrote:
Jeff Allen wrote:

My open vented indirect hot water cylinder has developed a slight leak
around the top pipe connected to the coil heat exchanger. See here for
a pictu

http://tinypic.com/view/?pic=2zq776r

I presuming this will get progressively worse. Is this something that
can be repaired or will it be time for a new cylinder soon.




You simply need to remake that joint. You don't even need to fully
drain down, just the coil. You should be able to shut off its feed from
the header tank, and if you're lucky there will be a drain cock
somewhere.



Thanks for the advice but it's actually leaking around the coupling
that's integral to the cylinder, i.e. the bit that comes pre-fitted to
cylinder rather rather than compression joint.


Normally if the cylinder is on the way out - copper has corroded
through around the fitting, you would expect the leak to be at that
location. Somebody else had that problem this past week and needed
a quick and temporary fix until the cylinder was going to be replaced
anyway.

The photo isn't completely clear, but in the position that you have the
arrow, it looks as though it is a place where the male threaded end of
the compression fitting.

Really there are two choices.

- Take the connections apart as Grunff has suggested. If the leak is
around the threads of the fitting, it should be possible to reseal it
with PTFE tape or hemp and Boss Green.

- Replace the cylinder. Perhaps the best approach would be to
identify a source of a replacement cylinder, attempt the repair and
then if that proves not to be possible, replace the cylinder



  #5  
Old November 18th 06, 09:28 PM posted to uk.d-i-y
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Posts: 615
Default Leaking Hot Water Cylinder

Jeff Allen wrote:

Thanks for the advice but it's actually leaking around the coupling
that's integral to the cylinder, i.e. the bit that comes pre-fitted to
cylinder rather rather than compression joint.



Yes, I can see that. I didn't mean remake the compression joint (which
you'll have to do anyway). I meant undo the flange fitting, clean up,
apply sealant, redo.


--
Grunff
  #6  
Old November 19th 06, 01:28 AM posted to uk.d-i-y
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Posts: 328
Default Leaking Hot Water Cylinder

On Sat, 18 Nov 2006 20:28:36 +0000, Grunff wrote:

Jeff Allen wrote:

Thanks for the advice but it's actually leaking around the coupling
that's integral to the cylinder, i.e. the bit that comes pre-fitted to
cylinder rather rather than compression joint.



Yes, I can see that. I didn't mean remake the compression joint (which
you'll have to do anyway). I meant undo the flange fitting, clean up,
apply sealant, redo.


I had a similar problem where on mine the flow and return pipes in to the
cylinder were leaking .I had to undo the connection and got rid of the crud with
a wire brush then do it up again using tape and also some heat resistant
silicone I got from Screwfix .Hasn't failed yet and that was about 2 years ago .

http://www.screwfix.com/app/sfd/cat/...96043&id=13185
  #7  
Old November 19th 06, 04:57 PM posted to uk.d-i-y
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Posts: 4,046
Default Leaking Hot Water Cylinder


"Jeff Allen" wrote in message
...
My open vented indirect hot water cylinder has developed a slight leak
around the top pipe connected to the coil heat exchanger. See here for a
pictu

http://tinypic.com/view/?pic=2zq776r

I presuming this will get progressively worse. Is this something that can
be repaired or will it be time for a new cylinder soon.


New cylinder is the best bet here. Best re-assess your hot water system
while at it. Look at a Rinnai high flow multi-point water heater - it will
give two high pressure showers, get rid of the cylinder and tanks too. The
business.

  #8  
Old November 19th 06, 09:24 PM posted to uk.d-i-y
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Posts: 227
Default Leaking Hot Water Cylinder

On Sun, 19 Nov 2006 15:57:25 -0000, "Doctor Drivel"
wrote:


"Jeff Allen" wrote in message
...
My open vented indirect hot water cylinder has developed a slight leak
around the top pipe connected to the coil heat exchanger. See here for a
pictu

http://tinypic.com/view/?pic=2zq776r

I presuming this will get progressively worse. Is this something that can
be repaired or will it be time for a new cylinder soon.


New cylinder is the best bet here. Best re-assess your hot water system
while at it. Look at a Rinnai high flow multi-point water heater - it will
give two high pressure showers, get rid of the cylinder and tanks too. The
business.


A 30 minute plumbing job to fit a new tank or endless expense to get a
shanty town water heater and a shower that rips the skin off and
flushes it down the drain.

The Japs fitted Rinnai's years ago. Now they are buying storage
systems with copper cylinders and header tanks like there was no
tomorrow.

Multipoints and combi are dead. Storage is the future.


--
  #9  
Old November 19th 06, 10:20 PM posted to uk.d-i-y
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Posts: 4,046
Default Leaking Hot Water Cylinder


"Matt" wrote in message
...
On Sun, 19 Nov 2006 15:57:25 -0000, "Doctor Drivel"
wrote:


"Jeff Allen" wrote in message
...
My open vented indirect hot water cylinder has developed a slight leak
around the top pipe connected to the coil heat exchanger. See here for a
pictu

http://tinypic.com/view/?pic=2zq776r

I presuming this will get progressively worse. Is this something that
can
be repaired or will it be time for a new cylinder soon.


New cylinder is the best bet here.
Best re-assess your hot water system
while at it. Look at a Rinnai high flow
multi-point water heater - it will
give two high pressure showers, get
rid of the cylinder and tanks too. The
business.


A 30 minute plumbing job to fit a new
tank


Lord Hall, he has to assess his requirement and what he would gain. Lots of
space, supberb performance etc.

snip tripe

 




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