plastic soil pipe connection to new cast iron stack

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Craig89
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Joined: Sat 12th May, 2018 11:18 am
Location: Shropshire

Re: plastic soil pipe connection to new cast iron stack

Post by Craig89 » Sat 6th Jun, 2020 10:32 am

Image

This is how the branch goes into the building. To get it in I removed about 4 bricks and then cut them and reinstalled them after the pipe was in

Feltwell
Posts: 5838
Joined: Sun 18th May, 2008 7:28 pm
Location: Shropshire, England

Re: plastic soil pipe connection to new cast iron stack

Post by Feltwell » Sat 6th Jun, 2020 5:09 pm

Zebra wrote:
Sat 6th Jun, 2020 9:14 am
Love your "beautiful period property detail....not so much" series of photos Feltwell.
Context is everything :D

Ahh well, it's a work in progress. If I'd taken a picture of how it looked when we moved in you would also have seen a badly collapsed leaded light window, spalled saturated stonework, stone lintel above the window badly cracked with the remains of old iron fixings sticking out of it, a gas pipe going through the cellar window ( :roll: ), naff plastic hopper and downpipe held in place with duct tape, no lead at the top of the porch, and porch brickwork in a right old state. Depressing that that area still looks cr@p, but hey ho, one job at a time!

I managed to free the opener in the cellar window last weekend without doing any damage, bit of an achievement as I reckon it had been rusted shut for at least 50 years. Oscillating multi-tools are wonderful! Managed to pass an old wood blade through gaps on the edge of the window and slowly cut through the rust. One of the hinges is broken though (I knew that before freeing it off) so I'm going to have a go at welding it, in-situ is the only option - having successfully welded some other cast iron recently. Worst case is I seal it shut again, as it was before.

Anyhow - due apologies to Matt for dragging his post off topic!

fernicarry
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Joined: Fri 22nd Jan, 2016 11:10 am
Location: Argyllshire

Re: plastic soil pipe connection to new cast iron stack

Post by fernicarry » Mon 8th Jun, 2020 11:35 am

overlander matt wrote:
Thu 4th Jun, 2020 10:47 pm
To do this I was thinking about fitting a T-piece to the vertical stack then a short straight pipe connecting to a 90 deg elbow which should line up with the hole made using a core drill. The question is how to connect the plastic pipe into the cast iron fitting? Has anyone else done anything similar and could share their experience?
Had to do something very similar. The old branch had a piece of cast iron pipe coming through the thickness of the wall with the plastic attached to it on the inside with a rubber sleeve contraption held on with jubilee clips. This was a bit of a magnet for debris and we had constant problems with it backing up. None of the below ground drainage was intact either...

Now the plastic goes all the way through the wall into the socket on the back of the branch and its sealed up with lots and lots of denso tape. From the outside none of the plastic is visible. I used a branch with a maintenance panel in case of any further problems but have never had to open it. I figure even if it does leak at least the join is practically external. Still need to point it up and properly seal the spigot on the top, its only been 4 years...

Feltwell
Posts: 5838
Joined: Sun 18th May, 2008 7:28 pm
Location: Shropshire, England

Re: plastic soil pipe connection to new cast iron stack

Post by Feltwell » Tue 9th Jun, 2020 9:45 am

JohnArmer wrote:
Sat 6th Jun, 2020 9:56 am
Feltwell wrote:
Fri 5th Jun, 2020 9:54 am
A bit of "cast iron porn" for a Friday morning.....
Very nice. I've carefully taken down cast iron downpipes and the soil stack for re-instatement: we've got plastic there at the moment. I must get on and do them but there are so many other things to do.
A tip for when you come to clean them up - if you've got or can borrow a decent compressor, a needle scabbler attachment on an air hammer is I've found by far the best way to get old paint and rust off, far more effective than a wire brush. Still a slow, noisy, dirty horrible job though!

overlander matt
Posts: 195
Joined: Wed 2nd Jan, 2019 10:12 pm

Re: plastic soil pipe connection to new cast iron stack

Post by overlander matt » Tue 9th Jun, 2020 10:17 pm

I have enjoyed seeing Feltwell's soil stack - quite a construction!

Thanks for the advice Craig and Alan. I think I will need to cut a larger hole in the brickwork to accommodate the collar of the cast iron bend and then try to join a section of plastic to that - the plastic is a fairly tight fit in the iron. I'm wondering what the best method of joining and sealing is? Given the joint is going to be inside the wall, it's essential that it doesn't fail anytime soon...

I did have the option of running the stack internally in plastic. I'm not sure why I chose to go external other than the original stack was on the outside...

Craig89
Posts: 211
Joined: Sat 12th May, 2018 11:18 am
Location: Shropshire

Re: plastic soil pipe connection to new cast iron stack

Post by Craig89 » Wed 10th Jun, 2020 10:42 am

Technically I dont suppose theres any reason you couldn't put a plastic pipe into a cast iron socket (assuming it goes in ok with clearance) and seal it as you would cast to cast using the wet cord and sealant. Maybe I could have done that instead of putting a small length of cast into the branch socket and then joining that to the plastic with a sleeve. There may have been a reason why I did it that way but I dont remember

overlander matt
Posts: 195
Joined: Wed 2nd Jan, 2019 10:12 pm

Re: plastic soil pipe connection to new cast iron stack

Post by overlander matt » Wed 10th Jun, 2020 9:46 pm

The piece of plastic pipe I had at hand was a fairly tight fit. Tight enough to make me a bit concerned I wouldn't get enough sealant around it to give a decent enough seal. I've got a bit more homework to do on this before I do it for real!

Feltwell
Posts: 5838
Joined: Sun 18th May, 2008 7:28 pm
Location: Shropshire, England

Re: plastic soil pipe connection to new cast iron stack

Post by Feltwell » Fri 18th Jun, 2021 5:14 pm

Feltwell wrote:
Fri 5th Jun, 2020 9:54 am
A bit of "cast iron porn" for a Friday morning.....

Here's one of this week's endeavours, an old cast iron hopper rescued and installed on my newly repointed porch complete with restored stonework, fed into by a lead overflow detail above.

Image


Alas if you pan out you'll also see the ugly plastic soil stack with it's even uglier connections, gas meter box, boiler flue, knackered cellar window in need of restoration, lots more repointing and brick repairs to do... :lol: :lol: The sheet of OSB is at least only resting against the wall (goes on the ground when repointing to stop mortar stains on the tarmac drive)

Image

I've just shown you the ugliest part of Feltwell Towers! Ahh well, at least *one* bit is done now....... :wink:
Brickwork repairs in progress, temporary lashup of putting the waste pipes for our bathroom sink and bath through the newly cored hole for the to-be-installed soil pipe, house temporarily reduced from 3 loos to 1 (which with 6 people, good job the British know how to queue!) - but - even with brickwork not washed down yet after the repointing, it looks better already I think.

Helped by my removing an internal wall over the winter - gave me plenty of bricks that are a perfect match to the external walls, even if they are a bit clean. This area had been knocked about so badly, we've changed about 30 bricks in total just in this area. *Nearly* finished repointing the house now.......

Image

a twig
Posts: 745
Joined: Sun 6th Oct, 2013 10:18 pm

Re: plastic soil pipe connection to new cast iron stack

Post by a twig » Sat 19th Jun, 2021 7:20 am

Excellent work on those bricks - really well done 👍

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