Ask The Trades - Marley plastics....

wotamess

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Marley plastics....
Aug 16^th, 2005, 1:36am

I am replacing a bathroom suite which has a soil stack pipe dia. of 3". (..its been mentioned that rainwater pipe was used!?)
To keep things simple I have managed to get Marley fittings to do the job which are slightly larger dia.
How can I fit the larger dia. Marley pipe to the older smaller pipe (..about 3mm) ..this only needs to be connected at the ground level soil stack.
I also have a Wickes Soil Vent valve unit for use internally..fits on top of the soil stack ( which runs up to through the loft and exits onto the roof.)
Because of the pipe dia. probs. I assume I can use this "new" soil venting unit which fits using an adapter. ???

Any help appreciated...thanks!

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thescruff Global Moderator Trade Member Author Offline Who said plumbing was easy. Posts: 6037 Total Thanks: 147 For This Post: 0 Gender: Trade: Plumber	Re: Marley plastics.... Reply #1 - Aug 16^th, 2005, 7:09am What make is the existing pipe and fittings.
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bstyle GDPR opt-out Total Thanks: 147 For This Post: 0	Re: Marley plastics.... Reply #2 - Aug 16^th, 2005, 7:51am Are you sure that it's not just the vent pipe that is 3"? This was done quite often a few years ago on the vent pipe only as it was an acceptable minimum size.
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chrishutt Trade Member Offline What is YaBB 1G - SP1? Posts: 28 Total Thanks: 0 For This Post: 0 Gender: Trade: Not Specified	Re: Marley plastics.... Reply #3 - Aug 16^th, 2005, 9:00pm Could you give exact Outside Diameter (OD) measurements in mm for each type of pipe involved? I.e. 110 mm (4"), 82mm (3"), 68 mm (2.5" rainwater), etc.?
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wotamess GDPR opt-out Total Thanks: 0 For This Post: 0	Re: Marley plastics.... Reply #4 - Aug 16^th, 2005, 11:43pm I will measure asap...the fittings are/were Osma.
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thescruff Global Moderator Trade Member Author Offline Who said plumbing was easy. Posts: 6037 Total Thanks: 147 For This Post: 0 Gender: Trade: Plumber	Re: Marley plastics.... Reply #5 - Aug 17^th, 2005, 7:10am [quote author=wotamess link=1124152592/0#4 date=1124232201]I will measure asap...the fittings are/were Osma. [/quote] Then you should be using Osma or polypipe which will fit. Go to your nearest Plumbcentre
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wotamess GDPR opt-out Total Thanks: 147 For This Post: 0	Re: Marley plastics.... Reply #6 - Aug 17^th, 2005, 9:29am Thanks for the advice scruff....but Plumbcentre do not stock Osma now!
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billythekid Trade Member Offline I love YaBB 1G - SP1! Posts: 3402 Total Thanks: 0 For This Post: 0 Trade: Plumber	Re: Marley plastics.... Reply #7 - Aug 17^th, 2005, 1:18pm Grahams stock Osma btk
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thescruff Global Moderator Trade Member Author Offline Who said plumbing was easy. Posts: 6037 Total Thanks: 147 For This Post: 0 Gender: Trade: Plumber	Re: Marley plastics.... Reply #8 - Aug 17^th, 2005, 5:36pm [quote author=wotamess link=1124152592/0#6 date=1124267362]Thanks for the advice scruff....but Plumbcentre do not stock Osma now! [/quote] Plumbcentre stock polypipe which is made by osma.
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wotamess GDPR opt-out Total Thanks: 147 For This Post: 0	Re: Marley plastics.... Reply #9 - Aug 17^th, 2005, 6:06pm O/ds are Osma pipe into soil at ground level = 75mm and the Marley replacement pipe dia. 82mm. So I need to adapt the 82mm down to fit into the 75mm...if you understand what I mean!...otherwise it means digging up and replacing the soil fitting which I don't think I'm capable of!
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chrishutt Trade Member Offline What is YaBB 1G - SP1? Posts: 28 Total Thanks: 0 For This Post: 0 Gender: Trade: Not Specified	Re: Marley plastics.... Reply #10 - Aug 17^th, 2005, 9:35pm 75mm OD is definitely non-standard for soil pipework. Is this the OD of pipe or fitting? If fitting, it might be a socket for 68mm rainwater pipe. Can you check this? If it really is soil pipework, you could try adapting to it with one of these http://www.flexseal.co.uk/products/fern-straight.htm
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wotamess GDPR opt-out Total Thanks: 0 For This Post: 0	Re: Marley plastics.. Reply #11 - Aug 17^th, 2005, 10:54pm Thanks for that chrishutt..yes... 75mm is the o/d of the soil pipe ...therefore the 82mm Marley dia. poses a problem ??? ..it will slip over the 75mm dia. but then the problem will be a good enough seal.
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chrishutt Trade Member Offline What is YaBB 1G - SP1? Posts: 28 Total Thanks: 0 For This Post: 0 Gender: Trade: Not Specified	Re: Marley plastics.... Reply #12 - Aug 17^th, 2005, 11:59pm What about the link I gave you? No good? I'm still curious about where this 75mm OD Osma soil pipe came from. Have you asked Osma (Wavin Plastics) about it? If they can supply a socket, the socket might just have an OD of 82mm! Then you could connect using standard soil fittings.
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wotamess GDPR opt-out Total Thanks: 0 For This Post: 0	Re: Marley plastics.... Reply #13 - Aug 18^th, 2005, 12:15am The link showed adjustable collars, but I don't think they would work in this situation ie. big dia. to small dia...and also the 3" soil pipe is too close to the house wall! I am going to a branch of Grahams in the morning...maybe they will have a fitting to suit...will report back...thanks once again.
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bstyle GDPR opt-out Total Thanks: 0 For This Post: 0	Re: Marley plastics.... Reply #14 - Aug 18^th, 2005, 12:17am Osma still sell 3" plastic pipe and fittings, I've bought it in the past. It's not the sort of thing that can be picked up at your local Plumb Center but it is still made. The 3" is equivalent to your 75mm measurement.
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JerryD GDPR opt-out Total Thanks: 0 For This Post: 0	Re: Marley plastics.... Reply #15 - Aug 18^th, 2005, 11:28pm I've just bought a load of 3" Osma pipe and fittings, off the shelf at Builder Center. All grey above ground stuff. Using it for draining a large flat roof (6 roof outlets).
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chrishutt

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Re: Marley plastics....
Reply #16 - Aug 18^th, 2005, 11:54pm

I think you guys must be referring to the normal 3" soil pipework which has an outside diameter of 82mm. The poster needs something to match soil pipe with an OD of 75mm. If you have something with 75mm OD please give details.

By the way, Wotamess, do you realise that you can't discharge a normal WC into 3" (82mm OD) soil pipework? The pipe must not be smaller than outlet of WC (normally 100mm). So I think you may have to dig down to drain connection anyway.

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