Get a pressure-assist toilet if a clean bowl using less water is a top priority
"My pressure-assist toilet flushes extremely well, but It's very loud.
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Pressure-assist toilet bowls also have a larger water surface than standard toilets.
Water-efficient toilets fit into three categories: single-flush at 1.6 gallons per flush (gpf), dual-flush toilets (1.6 gpf/0.8 gpf) and pressure-assist toilets (1 gpf).
Manufactured with the PF2 engineered pressure vessel and the company's in-wall carrier system, this pressure-assist toilet
provides stronger, more efficient waste extraction, reducing clogs and eliminating double flushing.
Finding a low-flow gravity-flush or pressure-assist toilet that performs well is now easier than ever, thanks in no small part to a guy named Bill Gauley.
While they are usually less effective at removing solid waste than pressure-assist toilets (described below), gravity-flush toilets are generally less expensive and easier to maintain, because most use standard parts.
push water and waste down the drain with a pressurization system and use roughly 0.8-1 gpf.
Alternatively, pressure-assist toilets
, such as Kohler's Pressure Lite (photo, left), employ an air cartridge that's charged by the water pressure from the supply line to push water from the tank using just 1.1 gallons of water.
These pressure-assist toilets
have an inner airtight flushometer tank that is pressurized after the flush as the tank refills (air is compressed at the top of the tank).
Tip: Pressure-assist toilets
are common in public restrooms, so you can take one for a test drive at an office or business.
(right) look similar to standard gravity-flush toilets (above) but use a specialized tank and compressed air to send waste down the drain.