A question about bath drains

NSG666

Professional my r's

plumb1_2

Does as others have said run the pipe above floorboards, while the panel is off.
Get a multi tool and cut a section of flooring out, and connect that white mcapline elbow to the original push fit pipe( Bartol). Then  use solvent weld pipe
1-bend,1-pipe, 1- small solvent cement as use existing trap
please don’t use flexible pipe.

Now I am off to the pub to watch the match, comon you blues ha ha

VoucherMan

Thanks for all the advice, suggestions, recommendations and anything else. For better or worse I have, at least for now, gone for the easy option and used the McAlpine flexible connector, along with clamping the waste pipe closer to the underside of the floor, so at least now the drain is horizontal instead of sloping up toward the exit!

I'll need a little time to convince myself that replacing the tiles on the bath with a regular panel is a good idea, but if I manage to get started, it should be simple enough to improve the drain further, with all the help on here. That said, my usual form is to just forget about something once it's 'fixed', and not re-visit unless further problems occur. Time will tell.

Just for visualisation in case anyone's curious. The bathroom is about 2.6 metres x 1.5 metres. The outside wall is on the right side of the image. Top right is the toilet, with the wash basin next to it. The bath waste pipe comes through the outside wall about 10 inches below the toilet soil pipe.I don't know exactly where it crosses from one side of the bathroom to the other since it can be seen running straight along most of the bathroom (3rd image on OP). It does appear to be virtually horizontal from one corner of the room to the other. 

Another idea that occurred, which I'll mention now to give everyone time to advise me against it, would be to just raise the existing pipe from under the floor and link it directly, or at least via a single connector, to the trap. I'm not even sure it would be possible. I'd need to temporarily remove the floorboards to raise the pipe, and one of the boards would need a much bigger slot cutting where the pipe would slowly rise through the floor.

Bendy_House

Hmm, you don't want 'horizontal', you want a constant, gentle slope.

If you look at your P-trap, its outlet is close to the bath's bottom, so that provides an ideal high starting point for a straight pipe to slope gently downwards over the length of the bath, as recommended to you before. And then down to connect with whatever the existing pipe goes to. It is surely the best solution, by far?

VoucherMan

Bendy_House said:

provides an ideal high starting point for a straight pipe to slope gently downwards over the length of the bath, as recommended to you before. And then down to connect with whatever the existing pipe goes to. It is surely the best solution, by far?

I agree a sloping pipe will be better, but that's going to take a while until I'd want to tackle the job. Being something of an expert procrastinator doesn't help. Neither does the recently arrived good weather which has given me the chance to enjoy more outdoor time.

For now, the pipe is at least repaired, and in a better state than it's been for many years. I don't know when the drain was first installed (the house is Victorian), but if it's been like this for so many years, a bit longer won't harm it.

Bendy_House

Fair do's, and espec about the 'procrast' part

Worth tackling at some point tho'; flexis are less than ideal (the concertinas catch debris and can become sludgy), and 'horizontal' can do ditto.

And then there's the fact that you just know is hasn't been done proper, like... 

daivid

VoucherMan 

I don't know when the drain was first installed (the house is Victorian), but if it's been like this for so many years, a bit longer won't harm it.

I think others will be able to date it all a bit better but it's definitely not Victorian! The push fit on the hot/cold suggests the last 20 years to me. The bath has modern legs/supports. Definitely worth re-doing properly, if it blocks and leaks you could end up re doing the ceiling below too. I would replace the whole run after the waste with solvent weld (as others have suggested).