Help with connecting an Ikea double sink vanity

Submitted by Korkusuz1 t3_11exmxo in DIY

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Hi all, just seeking some plumbing advice on trying to connect my Ikea double vanity sink to a single outlet.

I know Ikea sinks might have a lot of critics, but it was the only double sink available in a 1 metre size that fitted our small bathroom.

Should I connect them both to a Tee piece, and then drop it down to the P trap and out to the exit pipe? Or should I have one sink dropping down to the P trap and exit pipe, and have the other sink connect to that ?

Any advice or pointers would be greatly appreciated.

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FreeXFall t1_jagm6ia wrote

If you’re in America - Home Depot has double sink kits. You can Google and YouTube for it as well.

I feel like both your suggestions are the same thing. Big thing is - working backwards - it goes exit to a p trap. It doesn’t really matter if you have a primary and the other sink joins or if both sinks join and then go to the P.

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Korkusuz1 OP t1_jagppou wrote

I’m in Australia, so we have Bunnings which are the equivalent and essentially have that sort of pipe piece available, I had just read with double sinks that one should directly go to the exit, and the secondary sink should attach to that main pipe. The piping would be slightly different in that configuration if you could imagine, but if you’re saying the first suggestion works I can do that.

I just don’t know how to get a proper slope from the 90 degree pipe bends, the connector pipes would be horizontal before hitting the Tee piece from both sinks. I thought it might be a minor issue, but if not I might head with your suggestion. Thanks.

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FreeXFall t1_jahvmro wrote

If it’s perfectly horizontal or even slopes a tad the wrong way, it’s not really an issue. If you don’t use it for a few days it could start to smell, but once you use it, any of the water that was sitting will flush out.

Saying that, to get a slight downward slope - cut one of the tailpieces to be slightly shorter than the other. Just a small amount is enough to give a slope. (Tailpiece goes from the metal sink drain to everything else).

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Ok_Gate_7323 t1_jalaixv wrote

Handyman I assume?

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FreeXFall t1_jalas2v wrote

No, but I take that as a huge compliment. Our first and now second house have both been fixer uppers. Lots of nights and weekends fixing or watching YouTube’s. Plumbing is something I actually really enjoy (I think it’s all the pieces so it’s like adult legos). I hate electrical though - I have large hands and just fumble with the wires.

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Ok_Gate_7323 t1_jbig2hi wrote

That is a handyman.

The reason it begins to smell is because it is not draining properly. Water will eventually make it up hill when you backpitch a pipe, but it leaves behind the gummy stuff like toothpaste, oils and soap. This sits in the backpitched pipe building up and closing off the drain. The smell is because it is decomposing right there in your drain.

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Icy_Jackfruit9240 t1_jahrsn1 wrote

BTW, sometimes it's not possible without special short connectors or flexible drain tubes (which might not be legal where you are.) This just happens because when it was built, they built it for what they installed. (A cursory look seems as though flexible drain pipes are allowed in Australia.)

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259x28x39 t1_jakhgsr wrote

Ikea sells I believe. You have to ask for it or know what you are looking for - think it's called TRILLINGEN?

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Korkusuz1 OP t1_jal3cef wrote

I just looked it up, doesn’t appear to be in the AUstore, but might be able to it off eBay. I think this might be the perfect solution.

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259x28x39 t1_jal3rmb wrote

Ah, right on. Maybe it's under a different name but poke around the Ikea site in case. Best of luck.

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TootBreaker t1_jalprpy wrote

P-trap is too low. Water has to stand up way above the trap before reaching the single outlet on the wall. Which means you'll never be able to take the trap apart without dumping a lot of excess water

I'd have two traps because I don't want to smell that horizontal section full of food scraps & grease

And would it be too late to build your under cabinet like a shower stall, complete with floor drain & overhead work light?

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