Bath waste into toilet soil pipe...
- Thread starter lowster
- Start date
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Wow, that's a huge notch out of that joist. Was it existing or have you just made it? Notches should be no more than 12.5% of the total depth of the joist.
As to your question, you'd normally put a 110mm tee in there, with a reducer in the end to take the waste. Having a pan connector under the floor like that isn't a good idea
As to your question, you'd normally put a 110mm tee in there, with a reducer in the end to take the waste. Having a pan connector under the floor like that isn't a good idea
Hi, Cheers for the response. The notch was already there, your right it is on the large side though!
So would you do it like this (attached pic)? Would I get any effluent pushed back towards the 40mm pipe when the toilet is flushed do you think?
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I'd put one of these into the tee https://www.mrcentralheating.co.uk/110mm-x-50mm-black-solvent-weld-soil-to-waste-reducer then use a reducer to bring to down to the required size. It should actually help to keep the soil pipe cleanHi, Cheers for the response. The notch was already there, your right it is on the large side though!
So would you do it like this (attached pic)? Would I get any effluent pushed back towards the 40mm pipe when the toilet is flushed do you think?
Ok, thank you. My only concern is with effluent being flushed and blocking the 40mm waste, I'm guessing it would just go in the direction of the fall and sweep of the Tee?
Also, would I need an anti-syphon trap on the bath? The soil stack is about 1 meter to the side of the toilet so don't know if the toilet flush would pull the water out of the trap?
Should be fine with a standard trap, and the correct fall will prevent it running the wrong way. If you're concerned, you could use a Y branch instead of a T, then a 45 to bring it vertical. It'll take up more room though so you'll have to consider whether you've got the height available to do that and fit the pan connector in as well
https://www.jtmplumbing.co.uk/pipe-...41/jtm-double-socket-branch-135-p23356/s39695
https://www.jtmplumbing.co.uk/pipe-...41/jtm-double-socket-branch-135-p23356/s39695
If that main soil pipe gets restricted or blocks for any reason then yes, the minute you pull the handle the waste will travel up into the bath. Or if there is a main stack venting issue then it can pull on the bath trap. IMO that's a problem waiting to happen.
Those bossed pan connectors are not designed to be used like that. Worst case they can be used in a vertical position on the back of a pan outlet to connect a basin into it if there is no other option.
I would suggest another option is looked for.
As far as the notches are concerned then you have 2 that are probably oder the allowed dimensions unless you have really tall joists. The one that's open and the one with the 40mm waste pipe in it. You should never have a 40mm waste pipe notched into a standard sized joist. Where are the other joists, where the grey 110mm soil pipe is running? Are the joists running at right angles at that point?
Thought I'd give an update - I hate looking at threads and there's no (potential) resolution! I went with Muggles' advice and used a reducer directly into the tee and it has been working fine since, so thanks again for your help.
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