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leaking connection on the feed pipe to an indirect cylinder


 
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DAVYBOY88

from United Kingdom

Joined: 25 Feb 2013
Posts: 3
Location: Hampshire,
United Kingdom

PostPosted: Mon Feb 25, 2013 11:06 pm Reply with quote

Hi, I have a leak on my indirect hot water cylinder. If you take a look at the picture on this link -
http://tinypic.com/view/?pic=2zq776r
it is leaking not from where someone on another forum marked his leak but from between the cylinder face and the washer beneath the
nut. This is on the top feed of the coil and I don't know whether it is boiler water or tank water that is leaking.
Putting the heating on demand doesn't seem to make it drip any faster.
I'm not sure if tightening the nut nearest the cylinder will have any effect.
I would guess that it was part of the original factory assembly and tightening it may try to turn the coil or even break a soldered seam!
To make matters worse I have a complicated set of fittings, including a cast iron sleeve, between the nut and the elbow on the feed pipe which means that each thread back would be loosened in turn.
The tank (not foam lagged) and pipework have been fitted for probably 40+ years so not sure what size pipework is.
Comments and suggestions would be greatfully accepted, thank you anyone.[/img]
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CBF

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PostPosted: Mon Feb 25, 2013 11:21 pm Reply with quote

it looks foamed lagged to me & it ain't 40 yrs old
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Breesey

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PostPosted: Mon Feb 25, 2013 11:27 pm Reply with quote

CBF wrote:
it looks foamed lagged to me & it ain't 40 yrs old


Was going to say same myself!

Not alot you can do about that without draining then stripping down the joint and remaking - I would think, I'm afraid!
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Nige F (26 Feb 2013)
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Nige F

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PostPosted: Tue Feb 26, 2013 9:01 am Reply with quote

That`s not the OP`s tank - he just used it as a reference icon_idea.gif
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Nige F

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PostPosted: Tue Feb 26, 2013 9:10 am Reply with quote

DAVYBOY88 wrote:
The tank **(not foam lagged)** and pipework have been fitted for probably 40+ years so not sure what size pipework is.
Comments and suggestions would be greatfully accepted, thank you anyone.[/img]
Sounds like you have 2 choices - get a plumber to attempt to manipulate the connection to fix the leak - or get a new cylinder . Option 2 . you`ll need the correct cylinder for your existing setup - or maybe even a re plumb with better controls if you`ve still got gravity primaries . Any good plumbers in Hants ?. PS when those cylinders were new we always used to check the tightness of the backnuts icon_wink.gif It will have to be done by draining down as the other Sussex Plumber said - so contain the leak if at all possible and wait for warmer weather
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DAVYBOY88

from United Kingdom

Joined: 25 Feb 2013
Posts: 3
Location: Hampshire,
United Kingdom

PostPosted: Tue Feb 26, 2013 11:57 am Reply with quote

Nige F wrote:
DAVYBOY88 wrote:
The tank **(not foam lagged)** and pipework have been fitted for probably 40+ years so not sure what size pipework is.
Comments and suggestions would be greatfully accepted, thank you anyone.[/img]
Sounds like you have 2 choices - get a plumber to attempt to manipulate the connection to fix the leak - or get a new cylinder . Option 2 . you`ll need the correct cylinder for your existing setup - or maybe even a re plumb with better controls if you`ve still got gravity primaries . Any good plumbers in Hants ?. PS when those cylinders were new we always used to check the tightness of the backnuts icon_wink.gif It will have to be done by draining down as the other Sussex Plumber said - so contain the leak if at all possible and wait for warmer weather


Thanks CBF, Beesey and Nige F, I'm not sure what is on the other side of the backnut in the cylinder.
If the backnut on the cylinder is not tight enough against the cylinder, what water do you think is leaking?
If it's the domestic HW from in the cylinder I could get away with just draining down the cylinder until the water level is below the joint to remake it.
If it's the central heating water though, I'll have to drain the CH system.
Many thanks again.
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Nige F

from United Kingdom

Joined: 28 Jun 2005
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PostPosted: Tue Feb 26, 2013 6:03 pm Reply with quote

It`ll be the domestic hot water in the cylinder that`s weeping through icon_wink.gif . If it goes well you`ll get away with just the hot drained -
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DAVYBOY88

from United Kingdom

Joined: 25 Feb 2013
Posts: 3
Location: Hampshire,
United Kingdom

PostPosted: Tue Feb 26, 2013 7:00 pm Reply with quote

Thanks Nige F, I thought it would be the domestic water.
A pal and I tried to turn the nut without success - even hammering the spanner end wouldn't budge it - but have a plan.
The leak is minor, you can see it beading at the bottom of the washer then running down the cylinder. So I plan to drain down to below the primary feed, dry and clean the area and apply Fernox LSX then allow to dry for 24 hours before refilling.
I've heard on the forums that it can be unsuccessful but hey - what have I got to lose - if it still leaks then oh crap, I'll have to drain down everything and dismantle the joints somehow!
Many thanks again for your help.
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