The Ikea kitchen sink plumbing thread - with a strong hint of cowboy

Pictures to follow, but I thought I would get the ball rolling.
The waste pipe from the sink is leaking.
On close inspection there is a flexible pipe leading outside which joins into a compression 90 degree bend outside.
The (long) outside pipe run is not clamped to the wall, but is supported by the flexible pipe which (it turns out) is not UV stable and is crumbling to dust.
An example of an Ikea twin sink waste can be found at https://www.ikea.com/gb/en/products/kitchen-products/kitchen-taps-sinks/ lillviken-water-trap-strainer-2-bowls-art-90311540/ which shows a long flexible pipe to acrry the waste.
IMHO that should go into a joint inside the house with hard plastic through the wall and on the outside.
I could potentially replace the Ikea fitting with a new one, but I have realised why they probably did what they did.
There is a retaining wall close to the rear wall of the house to keep the rising ground away from the brickwork. This means that the exit for the kitchen waste has to be above the retaining wall and that in turn means that the long flexible pipe run is potentially too long and I'm not sure if you can shorten it.
Anyway, looks as they had a bright idea which worked for a few years but is now failing.
Anyone know if standard waste fittings fit Ikea sinks, or if I am stuck with the same problem as the original fitters?
Cheers
Dave R
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On Monday, 20 August 2018 17:49:40 UTC+1, David WE Roberts (Google) wrote:

Black gloss paint can uv-proof exterior plastics.
NT
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Really?, not so sure about that. Besides it is a bit late for this one. Brian
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On 21/08/2018 07:35, snipped-for-privacy@gmail.com wrote:

Any colour. But first sand the plastic, then use primer, then gloss x 2.
Bill
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On Tuesday, 21 August 2018 14:35:31 UTC+1, Bill Wright wrote:

No, black is what's required. White paint doesn't cut it. And no, don't use primer or undercoat, just gloss straight onto plastic.
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On Mon, 20 Aug 2018 16:49:38 +0000, David wrote:

http://wiki.diyfaq.org.uk/images/0/04/Ikea_kitchen_waste_1.jpg
http://wiki.diyfaq.org.uk/images/6/64/Ikea_kitchen_waste_2.jpg
http://wiki.diyfaq.org.uk/images/f/f6/Outside_pre-bodge.jpg
http://wiki.diyfaq.org.uk/images/3/35/Outside_pre-bodge_2.jpg
http://wiki.diyfaq.org.uk/images/2/27/Temporary_Bodge.jpg
http://wiki.diyfaq.org.uk/images/8/82/Temporary_Bodge_2.jpg
Enjoy.
My next step is to go to Ikea and see if I can get a replacement flexible pipe.
At least that gives me the option to repeat the bodge which should be good for a few more years, perhaps more if I paint or otherwise cover the flexible pipe against UV.
I might even manage to fit a pipe clip outside.
If I can't get a spare I may have to bodge the broken bit with plastic bag, zip ties, gaffer tape to last a bit longer until I have more time.
Suggestions for the inside would be welcome. I could perhaps turn the inside flexible pipe (assuming that I can get it) into the biggest U bend known to man but that might have issues about the amount of water pressure needed to make the water flow out swiftly. Zig/zag the flexible pipe?
Anyway, off to Ikea to see if I can get the part.
Exciting times. :-(
Cheers
Dave R
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On 21/08/2018 12:33, David wrote:

Why not run a standard piece of pipe through the wall and a 90 degree bend immediately on the outside.
Inside, can the top of the trap be loosened so that the output of the trap is at a different angle?
You may then have more options to use a short flexi inside.
Toolstation do two different diameters of https://www.toolstation.com/shop/p55664
Also https://www.toolstation.com/shop/p45626
plus longer flexi lengths and push fit variants.
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Apart from the fitter possibly using something kicking around in his van, I can’t see why an entirely conventional series of right angle bends and solvent weld tube hasn’t been used to go through the wall.
I would junk the lot and start from scratch with rigid tubing.
Tim
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On Tue, 21 Aug 2018 12:26:39 +0000, Tim+ wrote:

sinks/

The main issue seems to be that the Ikea fittings are non-standard.
What you see under the sink is the complete Ikea waste fitting kit.
From searching the Internet I haven't been convinced that the fittings to the sink bowls are a standard size.
Anyway, those nice people at Ikea gave me a free replacement flexible hose. Assuming the new kit fits the old kit I have at least a way to make a temporary fix.
I hope to get a rigid tube through the wall as suggested, then fix the Ikea gubbins to it.
Next part is to hope the existing pipework comes apart in a friendly manner.
Cheers
Dave R
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David wrote:

If you haven't got some already, buy a tube of LS-X
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On 21/08/2018 18:04, David wrote:

The ikea fitting instructions indicate that you can cut the flexi pipe to length and it fits into what looks like a pipe reducer (the bit on the outside wall in one of your photos)
https://www.ikea.com/gb/en/doc/assembly_instructions/lillviken__aa-1989507-4_pub.pdf
The instructions also indicate that some connections are turn and click rather than screw up.
For information The dimensions of the flexi fittings toolstation sell are available from https://mcalpineplumbing.com/plastic-chrome-fittings/flexible-fittings-non-return-valves Each of the links is to the product page and from that page is a link to the technical drawing.
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On Tue, 21 Aug 2018 19:12:39 +0100, alan_m wrote:

lillviken__aa-1989507-4_pub.pdf

non-return-valves

Thanks. Too dumb to realise that is the fitting on the end of the flexible pipe is a washer which seats onto the pipe and into the adapter, the pipe can be cut to any length.
The big question is if the new flexible pipe will fit into the old fitting.
On the new fitting, the flexible pipe was a push fit into a rubber seal. No moveable parts to screw up and compress the joint. Now to find out how the old one worked.
Cheers
Dave R
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On Tue, 21 Aug 2018 19:33:09 +0100, Jim GM4DHJ ... wrote:

lillviken__aa-1989507-4_pub.pdf

non-return-valves

The version I have is white with joints which swivel.
If yours is the same (please see pictures) can you confirm how it comes apart?
I hope it is just a push fit, but I don't want to use undue force on the wrong bit and just make my problems worse.
Cheers
Dave R
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David wrote:

I'd ditch the flexible pipe, look for different traps that could save you enough space to do it with rigid pipe and elbows, e.g.
<https://www.ebay.co.uk/p/Wirquin-SP3223/27019911434 <https://www.toolstation.com/shop/p98234>
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you won't get one I tried last week......discon along with their old kitchen units and doors.......
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