Hole in rain downpipe

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  #1  
Old 11-25-17, 02:15 PM
Q
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Hole in rain downpipe

Seems like the previous owner cut a 1.75" hole as a clear out in this pipe instead of climbing on the flat roof to clear it.
it started leaking today with heavy rain and his previous repair failed. I have had to make a temporary fix with all that the hardware store had which was a 1.25" drain stop.
I used quick set paste epoxy to seal. So it's a pic pvc seal to a slightly rusty cast iron pipe. 3min set, 60cure

I pushed the pvc onto the epoxy and sandwiched it. My worry is that it doesn't make a proper seal.
How does epoxy seal in a situation like this with only slight pressure pushing on the parts?

Btw it's an old house. Ignore the fact there is a drain running through the center of a room!

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Last edited by PJmax; 11-25-17 at 05:56 PM. Reason: added pic from link
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  #2  
Old 11-25-17, 04:25 PM
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It appears a larger diameter pipe is just above or sitting on the patch. Could this be causing the leak? A pipe repair clamp will make a better fix, but you will have to go to a plumbing supply for the diameter needed. How is the larger pipe sealed to the smaller pipe. Out of curiousness, how is the pipe sealed at the roof?
 
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Old 11-25-17, 04:27 PM
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If it's leaking it's because the drain is pluged up.
 
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Old 11-25-17, 06:13 PM
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It's a 4" rain pipe probably shared with the house main waste stack - that's how they used to do it 100 years ago. It's leaking because someone drilled a massive clean out hole in it and the original plug failed! The picture shows the plug I had to repair it with!
Here is how it looked before and why it leaked:
 
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Old 11-25-17, 06:41 PM
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I would severely doubt it was put in for cleaning. More likely something was connected there. If that drain line was plugged.... putting that hole in as a cleanout would have resulted in a flood.

I would try to locate a rubber plug to put in there.
 
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Old 11-25-17, 08:01 PM
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1.75" rubber plug exists? Like a cork style you mean?
think the epoxy will work?
Or epoxy the entire hole and then fiber wrap?
 

Last edited by qwertyjjj; 11-25-17 at 08:45 PM.
  #7  
Old 11-25-17, 08:17 PM
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This would be the style I'm referring to. This is a 10 pack.
10-Pack-CleverDelights-Rubber-Stoppers
 
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