ZeroFlush - the intelligent waterless urinal
1) The average male urinates between 0.29- 0.35 litres each instance. Hence, if the volume of a cartridge trap type waterless urinal is less than 0.5 litres, some fresh urine that has not dropped the uric salts into the cartridge will pass through.
2) The urine will pass through the cartridge meeting the air at the secondary (casing) point (see picture below) prior to meeting the drainage pipe causing clogs. Since air is present the salts will dry-up and clog.
3) Note that, in Zeroflush , there is not a secondary housing since the housing is part of the trap. Furthermore, it is built directly into the main line.
4) Very importantly, the Zeroflush trap is 1.4 litres in size. Therefore, it can hold more urine, and does not allow any fresh urine to pass through that has not been filtered
5) Note that because our housing is part of the trap, the uric acid/salts remain wet in the housing. The salt sits beneath the water (note males urine is 96% water) and the natural biodegradable oil (blocking foul odour).
6) Now, after 15,000 visits have occurred and maintenance is due, the insert is pulled out and a pail of water is used to flush all uric salt deposits away. (At this point, also note that the ZeroFlush trap is made of ABS, hence sediments does not stick).
7) In conclusion, while other systems allow trickles of sediments to pass through, causing clogs in the secondary point or main line, Zero Flush’s waterless urinals are larger and built to hold more urine. They are built directly to the drain pipe and hold the salts until maintenance is due. All wet sediments will than be pail flushed away in one go, preventing clogging.
8) Further to the above, Zero Flush have used CCTV drain camera and have found zero sediments in the mains.
22-Jan-2007