bending white 40mm waste pipe

Wig

The plastic is called PVCu isn't it?

As they don't sell it with preformed 90° bends. I was wondering if it could be heated and then bent with a pipe bender or other method, due to the circumstances a screw fit 90° coupling won't do.

At a stretch this type might do but I'd concerned about leaks. I'd prefer to be able to bend the pipe, or buy a 1 peice 40mm pipe with a bend already there

Wig

http://www.youtube.com/watch?v=aZ4U7XdTIFQ

Need a less complicated method

at least it can be done, I need to insert something into the pipe to retain the shape which can then be removed afterwards from the 90 bend

Bogtrotter

Wig wrote: »

http://www.youtube.com/watch?v=aZ4U7XdTIFQ

Need a less complicated method

at least it can be done, I need to insert something into the pipe to retain the shape which can then be removed afterwards from the 90 bend

Don't know about 40mm pipe but for 15mm filling the pipe with fine dry sand and then heating with a heat gun allow you to bend the pipe without it collapsing.

muckybutt

Wig wrote: »

The plastic is called PVCu isn't it?

As they don't sell it with 90° bends in I was wondering if it could be heated and then bent with a pipe bender or other method, due to the circumstances a screw fit 90° bend won't do.

At a stretch this type might do but I'd concerned about leaks. I'd prefer to be able to bend the pipe, or buy a 1 peice 40mm pipe with a bend already there

What is it exactly you are wanting to do ? you dont make yourself very clear.

You can get 40mm elbows 45deg or 90deg in solvent weld fittings like the one in your link, you do know they are to be glued on dont you ?

googler

I've got pipe work with solvent-weld fittings like the one you pictured all over my house, and I'm not worried about leaks - why should you be?

keystone

You would only be concerned about leaks if you just pushed the joints together but they are supposed to be solvent welded as both Muckybutt and Googler point out - a solvent cement is brushed onto the end of the pipe and the inside of the bend and when they are pushed together the cement "melts" the mating surfaces together providing a solid welded joint. They don't leak!

You won't be able to bend the pipe and you can only buy it in straight lengths.

Thousands of these joints being made all over the country every week. Just don't try and take them apart after its all cured - you can't. I don't understand your reticence tbh.

You can also get swept bends as well as the 90 degree one you linked to and 135 degree ones too - just cut your pipe to suit.

Cheers

Wig

The lower part of the pipe needs to be horizontal and will run along at floor level it will then go through a 90° bend and travel upwards away from the floor.

There is hardly any clearance between where the pipe will be and the tiled floor, so litle clearance that a screw fit coupling would not be able to be used because then the pipe would no longer be horizontal due to the width of the screw fitting.

I even have reservations about using that slimline pushfit (and cement) version because even that is going to lift the pipe off the floor by 2 - 3mm.... And I still would be concerned about leaks, it's going to be in a place out of sight, if it leaked I wouldn't know about it.

So my first option will be to try and bend the pipe as in the video, thanks to bogtrotter who gave me an idea to try out for pipe bending. A 90° bend may turn out to be impossible for the plastic to cope with, as it will have to be stretched to the limits on the outside edge of the bend.

SailorSam

If it's a waste pipe you shouldn't have it running horizontal along the floor, you need an angled drop. Otherwise the water will sit in it, over time old soap and sludge will start to block the pipe up.

keystone

Wig wrote: »

The lower part of the pipe needs to be horizontal and will run along at floor level it will then go through a 90° bend and travel upwards away from the floor.

There is hardly any clearance between where the pipe will be and the tiled floor, so litle clearance that a screw fit coupling would not be able to be used because then the pipe would no longer be horizontal due to the width of the screw fitting.

A waste pipe should not be horizontal. It needs to have a fall and by a lot more than 2mm at one end or the water will not drain away.

I even have reservations about using that slimline pushfit (and cement) version because even that is going to lift the pipe off the floor by 2mm.... And I still would be concerned about leaks, it's going to be in a place out of sight, if it leaked I wouldn't know about it.

Solvent weld fittings are not pushfit. I have assured you that they don't leak if made properly and thats mainly because they can't and I'm not the only one telling you this is the correct solution. If you continue to have reservations then there is no point in continuing the thread

So my first option will be to try and bend the pipe as in the video, thanks to bogtrotter who gave me an idea to try out for pipe bending. A 90° bend may turn out to be impossible for the plastic to cope with, as it will have to be stretched to the limits on the outside edge of the bend.

I think you are totally and utterly wasting your time when there are tried and trusted solutions that have already been adequately explained to you and achieveable in a fraction of the time that the video showed but thats your prerogative I suppose. Did you spot that the pipe was creased thus presenting a weak point after it had been put in the jig?

If you succeed I'll bethe first to (metaphorically) shake your hand.

Cheers

Wig

Read my metaphorical lips

THE PIPE NEEDS TO BE HORIZONTAL AT FLOOR LEVEL

THE FLOOR LEVEL SECTION WILL ONLY BE 6 INCHES LONG AT THE MOST

THERE WILL BE NO REQUIREMENT FOR ANY FALL IN THE PIPE

THE THREAD IS PRIMARILY ABOUT BENDING 40MM PVC PIPE OR BUYING PIPE WITH PREFORMED 90 BENDS

ANYONE WITH ANY SUGGESTIONS ON THIS TOPIC FEEL FREE TO CONTRIBUTE TO THE THREAD

anyone unable to do this......I agree.....it would be pointless, them contributing any further to this thread.....I am already aware of my second choice method, which I will use if bending/buying preformed pipe does not work.

Thanks

googler

Wig wrote: »

And I still would be concerned about leaks, it's going to be in a place out of sight, if it leaked I wouldn't know about it.

And I'll assure you, as others have done, that if the joint is made properly, you need have no concerns. I've got joints like this under my sink, behind the vanity units in the bathrooms, under the floors in the bathrooms, and I don't spend my days worrying about whether they'll leak or not.