Sloan Valve Co.’s Flushmate IV 1-gallon pressure-assist system uses air pressure to flush. Rather than pulling waste through the trapway, the system, which works with tank-style high-efficiency ...

An objection to waterfree urinals is that without a flush of water, urine salts build up and clog the drain line. An objection to waterfree urinals is that without a flush of water, urine salts build ...