Waste Not with a Combo Sink Toilet


You’ve probably already seen this toilet and sink combination before.  It’s the W+W – short for washbasin and watercloset – from Roca.  The product, currently available overseas, reuses waste water from the sink in the discharge of the cistern, which helps it reduce water usage by up to 25% compared to a standard 6/3 liter dual-flush toilet.

According to Plumbing Park, the system has two waste options. Once the basin is full of water, the user can either flush it down the main line or recycle it for use in the toilet.

When the water is reused, it goes through a double filtration system to take out bacteria and odors, as well as particles and debris in the stream. The water is also chemically treated before being stored for flushing.

In terms of cost, Roca’s W+W is said to cost about £2645, which, by today’s exchange rate of 0.6389, translates to about $4140. It’s not cheap, but the product represents a striking combination of design, performance, and sustainability that usually doesn’t sell at rock bottom pricing.




Visual credits: Roca.

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  • Anonymous

    I love the idea and design, but $4400?!!


    • http://www.jetsongreen.com Preston

      I know, it’s a little high — the price of design sometimes.

  • Anonymous

    This kind of wash basin toilet basin flush was (first?) used in a public housing development called Quarry Hill Flats in the city of Leeds in W.Yorkshire England in the mid 1930’s.
    The housing also used a kitchen sink disposal system called .. er the Garchey System. The waste was flushed to be dried and burned for fuel in an on-site laundry facility.
    The flats (Apts) also had a coke burning stove that was used for cooking in the kitchen and heating the living room at the other side. Remember this was 75 years ago.

  • http://www.portlandbuilt.com/ Shawn

    Hi Preston,

    My friend Eli Spevak built something along these lines, but for a much more reasonable price tag. Not high design, but pretty functional (and affordable). You can see a photo of one on this blog: http://www.seeinggreen.org/2009/04/small-is-beautiful/

    Any questions, just ask!
    Shawn Busse

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