How fit in new rigid pipe?


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Old 08-24-16, 02:15 AM
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How fit in new rigid pipe?

I need to glue in a section of 4" pipe about 2ft long for a repair.
How can I get this to fit in and glue it with the couplers when there is no room to move the pipe sideways?
 
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Old 08-24-16, 02:31 AM
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Use no hub couplings. .
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Last edited by ray2047; 08-24-16 at 10:57 AM.
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Old 08-24-16, 05:29 AM
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The no-hubs have a middle stop, so you can't slide it all the way over the pipe.

Fit the hubs onto the ends of the old pipe. Loosen the steel jacket and slide it away from the rubber.
Fold the rubber back and insert your new pipe.
You can then fold the rubber back over the new pipe.
Slide the steel band back over the rubber and tighten the screws to 60 inch pounds, which is pretty tight. These no-hubs can be trusted to not leak and are the standard for pipe repair.
 
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Old 08-24-16, 05:36 AM
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Are these different to the rubber couplers that most hardware stores hold? Can those also be used?
What's the alternative, do I have to replace a large section of pipe?
Photo attached, I need to remove a small section near the left hand side where someone has put in a weird vent and I need to change the venting elsewhere in the system. (bear in mind this is not North America code, it was done by someone non licensed in Spain )


https://postimg.org/image/5n5305jcj/
 
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Old 08-24-16, 05:51 AM
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The no-hubs are perfect for this type of repair.
If they are not available in your area, use a rubber coupler that fits snuggly on the pipe and tighten the clamps.
The reason "Fernco" couplers (flexible couplers) are not recommended is because they do not fit snuggly onto most pipe, they are loose. They will work though and you should be OK.
You can replace as little or as much pipe as you like using the couplers.
 
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Old 08-24-16, 06:27 AM
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Your pipe on the right most likely will lift enough to put almost any type repair you want. The connections mentioned probably the easiest.
 
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Old 08-24-16, 07:50 AM
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How would it be done without the couplers? ie from new
Do you have to replace the entire horizontal section and the 2 90 degree elbows and slot in in one go? You don;t have much time to manouevre them with weld solvent.
 
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Old 08-24-16, 10:17 AM
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The horizontal section has a lot of wiggle room, so you could probably make the first connection on the horizontal pipe, followed by the left vertical section, basically lifting the horizontal section and 'dropping' it into the left vertical pipe.

BUT, I would probably go with no hub couplers regardless, they are much easier and will be much more forgiving than how quickly the cement can dry.
 
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Old 08-25-16, 02:17 AM
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I tried lifting it, it doesn't seem to move at all or do you mean that once cut, it should be able to move upwards
 
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Old 08-25-16, 03:16 AM
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I fail to see the need to cut out the little vent. Why not just cap the vent pipe and move on?
 
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Old 08-26-16, 04:08 PM
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Good idea Larry... sometimes the easiest solution is the best!
 
 

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