Bog standards

[GMM]

As part of a non-DIY (sorry folks but it's a big job) replacement of all our drains, we are laying a connection to create a new downstairs cloakroom from half of an existing pantry. From the layout etc, I can predict exactly where the (yet to be built) 'back' wall will be. The toilet will back onto this and the waste will run under this wall (if that makes sense!). The builder (all round good bloke) wants to lay the pipes but leave the end unfinished, so I can cut it to match the toilet. Good in principle, but I'd rather have the heavy building work done an dusted. He, and (independently) my friendly local plumbers merchants, both say that all toilets differ. I'm sure they are right but equally sure that there must be a 'good compromise' position for a socket in the floor or nobody would ever be able to replace a broken bog without using a flexible connector.

So....My questions: Has anyone resolved this issue before? Do I really have to get a bog (there's a 2 week wait on the one SWMBO would like, and the builder will be away long before then) to predict the dimensions or are we over-doing the issue here? It seems to me this is an area where the EU could do something useful for a change, by setting some standard dimensions.

Secondly: I have to add a hand basin into our upstairs facilities, where there hasn't been one before. I'm moving the toilet a bit sideways at the same time (so will have to use a flexible on this). I have seen pan connectors with with an inlet for a sink waste but on the top of a flexible it just looks precarious to me. Does anyone know if it's possible to find a socket that can go into the outlet on the floor that takes a sink waste (and then accepts the toilet waste)? I haven't found any, but perhaps someone knows of an obscure source (fingers crossed).

Cheers

[Roger Mills]

It would be hard to have absolute standards - particularly when using close-couples cisterns - because the bog has to be positioned so that the cistern is against the wall - and the outlet position is determined by that. [When I fitted one in an outside cloakroom, I was strapped for space - and used a slim-line cistern - which moved the bog closer to the wall than it would otherwise have been. See the picture below].

You've got far more scope if the bog's outlet is horizontal rather than pointing down - because you can get 90 degree bog connectors with various offsets - so you should be able to find one to fit.

When I did mine, [I did already had the bog and connector] I worked out where the pipe in the floor needed to be, and simply set a vertical piece of 110mm pipe (with no end fittings) into the floor - which I cut off flush once the screed had set. The connector is the type with rubber flanges on the outside - suitable for plugging straight into a piece of pipe. This is what the end result looks like:

[GMM]

Precisely what I'm looking to achieve. I rather agree that it should be possible to guesstimate then fiddle the fitting to that. I'm replacing the other bog precisely because it's an old jobbie that has a downward facing outlet: This was stuck into the pipe in the floor with whatever gunk they used in those days, with the obvious result that movement over the years has cracked it. New style horizontal outlets and plastic couplers solve that problem but seem to bring this issue of not knowing where the outlet should be. Hopefully, I'll receive my replacement for the cracked one in time to be able to give the builder exact dimensions, then if I get another of those, it should all work out. I was just surprised, I suppose, to find there aren't any fixed values for this and it's a suck it and see exercise every time.

[John Rumm]

One option would be to go for a socket in the floor right up against the wall, then using a 90 degree pan connector from the output of a conventional P trap bog.

Have a look at:

have a vast range of options.

Sounds like a recipe for an EU standard bog with EU standard turd that only flushes if you are on an EU standard diet with an EU standard sphincter!

Going with the theme from above:

[grimly4]

That's about the size of it. It would make life much simpler if there was a standard.

[GMM]

Hmm - you might be right - it could be the end of the traditional British Standard versions.......

[Rick Hughes]

I just got the manufacturer tech spec ... and set pipes to match .. allow for wall finish thickness (catches out many) Don't go flexy pipe route

[sm_jamieson]

I allowed about 15mm for wall finish (from bare plasterboard) as it will be= tiled (not done yet). However, in practice there is tolerance in the conne= ctors to allow for 20mm either way. This is for a "back to wall" loo, where= all connections will be under the china. Simon.