Discuss Advice on replacing solvent weld shower waste pipe into concrete floor in the UK Plumbing Forum | Plumbing Advice area at PlumbersForums.net

Shaun, Ben, these suggestions worked great! Problem solved. Thank you both very much indeed!!! 😀

Here I will post some photos of what I did as that may be helpful for others who need to do something similar.

Here are the steps I took.

1> Cut off the old elbow with a Multi-Tool. It helps to leave 5-10mm sticking up as it's easier to grab with pliers later.
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2> I bought this hacksaw at Woodies, it allowed me to score the inside of the piece that I intend to remove.
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3> Making the cut, I didn't go all the way through the piece that I removed as that would damage the elbow that I need to stay in place and be used again.
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4> I used an old hole saw and heated it using a heatgun.
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5> Applying the heated hole-saw bit to the inside of the pipe that I need to remove. Hold it with pliers obviously.
It's worth spending some time doing multiple rounds of heating and melting, I did this about 8 times, 30 seconds heating, 30 seconds melting, and moved the hot piece around the pipe as I went.
000004 (1).jpg


6> Now use your pliers to bend and twist the inner pipe. If you feel it's going to break it's best to release it and catch it further down.
000005 (1).jpg

I almost got it out in one piece and then used a file to knock off a bits that didn't come out with the pliers.

7> Done! I was able to insert a new elbow with a male lower end (spigot) and it works well! :)
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Thanks again, guys!

I have one follow on question, the particular elbow that I bought has a very long spigot. Can I cut that in order to get a lower elbow and therefore a better fall on my shower pipe?
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Cheers,
Dave
 
Yes you can cut the spigot end down to tbh tight if you need to
 

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