Making pipe connect

731 Views 5 Replies 5 Participants Last post by ben's plumbing, Mar 23, 2016

crescere

Discussion Starter · Mar 22, 2016

Is there a thought process or plan you guys use to connect pipe? I recently had a cast iron main sewer line crack and I am replacing it with PVC Schedule 40. The cast iron pipe was attached with metal bands and it was easy to remove. I am starting with a Fernco attached to the pipe coming in from under the footing of the house. This pipe is at about 45 degrees. The other side of the line is about seven feet away and about three feet higher than footing entrance, and is flat on the ground. It is also about two feet to the right of the pipe under the footing.

So I have about a seven foot piece of schedule 40 coming up at about 45 degrees and trying to connect to a pipe lying flat on the ground and about two feet laterally over. I know you can’t’ tell me exactly what to use here, but I would like to know how you approach these problems. Do you just use 45s, 90s, and 22s till you come up with something? There must be a disciplined strategy that won’t take me two hours by trial and error while I sit in this smelly crawl space. Thank you for any recommendations.

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joecaption

· #2 · Mar 22, 2016

Picture sure would be nice so we can see what your seeing.
I'd start by figuring out why it cracked.
Drain plugged up so there was water in it that froze, cast just so old it rusted out?
Line ran onthe outside of the house?

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TheEplumber

· #3 · Mar 22, 2016

You could do it mathematically- measure the distance- center to center of the 2 pipes.
Multiply that length by 1 .41. This will give you the length of the 45 offset.
Now, deduct the fitting make-up at each end and that will be the pipe length to join the 2 at a 45 angle.
Or you just eyeball it...:wink2:

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crescere

Discussion Starter · #4 · Mar 22, 2016

joecaption said:
I'd start by figuring out why it cracked.
Drain plugged up so there was water in it that froze, cast just so old it rusted out?
Line ran onthe outside of the house?

The house sat vacant for over a year, so that will be a mystery.

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Chrisathome

· #5 · Mar 22, 2016

you could post a picture so we could see whats going on plumbers are very visual, but you will have to experiment with different fittings especially if the pipe coming up isn't at a true 45 deg. Most of us just eyeball it, doing the math takes to long.

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ben's plumbing

· #6 · Mar 23, 2016

yep a picture of what you have would help..but as E said..you can calculate by using a cosecant of 1.414 to determine the distance between the centers of 2 bends...

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