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Top flush dual control toilet, Akaroa New Zealand (C) Daniel Friedman Top Flush & Dual Flush Water-Saving Toilets

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Dual flush & top flush toilets:

This article describes top flush and water-saving dual flush toilets currently sold & installed world wide. We distinguish among simple top flush and dual flush toilets, designs for low water-usage or water conserving toilet designs, models.

Photographs are provided of top flush and dual flush toilet types & brands.



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Tank Reservoir Toilet Type Variations

Top Flush Control Compared with Side Flush & Pedestal Flush Toilets: the photographs below compare a top flush toilet control (below left), a traditional cistern (tank) side or front flush lever design (below center) and a bottom pedal flush toilet (Thetford toilet, below right).

Tank top flush toilet Side flush toilet operation (C) Daniel Friedman Thetford flush toilet (C) Daniel Friedman

Instead of a flush lever on the front or side of the reservoir tank, some toilets employ a top-mounted pull-rod, or push-button to activate the toilet flushing cycle (Kohler toilet shown along with a bidet (background) at above left.

Dual flush toilet, Auckland New Zealand (C) Daniel Friedman

Top flush control toilets may be single flush (design shown above) or more often top flush toilets use a water-saving dual flush design discussed in more detail at DUAL FLUSH TOILETS (below in this article).

The traditional side flush lever toilet design (above center) uses a simple lever and pull chain to lift the flapper valve in the toilet cistern bottom to flush the toilet.

Other contemporary low-water usage toilets such as th Thetford toilet model (above right) used in a manufactured home (doublewide trailer) combine a reservoir tank with high water pressure or a combination of air and water to flush waste from the toilet bowl while using a minimum of water.

At left we illustrate a modern dual flush toilet opeated by building water pressure. This dual flush design toilet is installed in an airport toilet in Auckland, New Zealand. The wall mounted push plate

The toilet shown is produced by Fowler, a company operating in New Zealand since 1837. The conpany's toilet flushing pushplate incorporates pneumatic hoses to conduct water to the control and thence to the plumbing fixture. (Contact Caroma Industries, http://www.caroma.co.nz )

 

Top Flush Dual-Flush Control Toilets

Top-flush control toilets include both standard (typically a single rod is pulled or lifted - illustrated above) and water saving models (typically a pair of buttons giving different flush volumes) illustrated below. Dual-flush water saving toilets typically deliver 1.1 gallons to flush liquid waste or 1.6 gallons to flush solids.

Top flush flush valve toilet Glacie Bay (C) Daniel Friedman Top flush flush valve toilet Glacie Bay (C) Daniel Friedman

The manufacturer gives a clue about which button provides more water (for solids), in this case by the number of raised bumps on the buttons of this dual flush water-saving model.

Below we give views of the dual flush mechanism for this toilet. The top buttons push vertical rods (we' ve flipped the toilet tank upside down) shown below-left. The individual rods push on different segments of the flush valve (below right) to send a smaller or larger of water into the bowl below.

Top flush flush valve toilet Glacie Bay (C) Daniel Friedman Top flush flush valve toilet Glacie Bay (C) Daniel Friedman

The modern top flush dual control toilet and flush controls illustrated below is installed in the recently-renovated Akaroa Village Inn in Akaroa, New Zealand.

Top flush dual control toilet, Akaroa New Zealand (C) Daniel Friedman Top flush dual control toilet, Akaroa New Zealand (C) Daniel Friedman

At above right are the large (big flush ) and small (small flush) buttons on the tank top of this toilet. Below we illustrate the flush controls in the toilet tank or cistern.

Top flush dual control toilet, Akaroa New Zealand (C) Daniel Friedman Top flush dual control toilet, Akaroa New Zealand (C) Daniel Friedman

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Continue reading LOW WATER USAGE TOILETS or select a topic from closely-related articles below, or see our complete INDEX to RELATED ARTICLES below.

Or see ALTERNATIVE & WATERLESS TOILETS where we discuss low-water, no-water, chemical, composting, and incinerating toilets, listing models, sources, and characteristics of those toilet types & models.

Or see WATERLESS URINALS

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