pipe sealant

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Old 03-24-03, 09:29 PM
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pipe sealant

I've got a slow water leak on a metal pipe coming out of the furnace. Is there a pipe sealant available that would stop the leak?
 
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Old 03-25-03, 10:35 AM
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leak

Need a lot more info---- info------ info here
 
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Old 03-25-03, 03:00 PM
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- the leak is slow, about 1-2 drops per day
- the pipe is a metal (lead or galvanized) about 3" diameter
- the pipe carries hot water from the furnace
- the leak appears to be coming from the joint of an elbow

Please let me know what additional information is needed.
 
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Old 03-25-03, 03:03 PM
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There are probably 10 sealants that would stop the leak but I have the feeling that you left out the part where you tell us you don't want to take the pipes apart.

In my opinion, you are not going to find something to stop the leak from the outside.
 
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Old 03-25-03, 03:21 PM
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Thanks Kfield.

...and I don't want to take the pipe apart. Mainly because it looks to be quite a big job for someone who's not all that handy.
 
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Old 03-25-03, 04:45 PM
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leaks

Ok its a boiler. If you want there is a boiler leak stop you could try. You would have to drain the boiler down if you dont have a pump to put it in with This does work for small leaks like you talk of ED
 
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Old 03-25-03, 05:36 PM
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2 things to consider before using a boiler stop leak compound.

First, make sure the leak is at a heating system connection and not a domestic water coil inlet or outlet.

Second, if your boiler has a domestic hot water coil, the stop leak can reduce the heating capacity of the coil by covering it with scum.
 
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Old 03-25-03, 05:37 PM
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Thanks for your reply Ed.

Sounds like the sealant is applied from the inside of the pipe (i.e. added to the water). Is there anything available that can be applied to the outside of the pipe?
 
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Old 03-26-03, 10:58 AM
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leak

Well if you want to go that way there are a lot of them that SAY they will stop a leak on the outside of the pipe. All I can say is give them all a try. Dont forget that it will be put on a hot pipe ED
 
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