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Urine passes through a one-way valve that closes once flow has stopped, preventing odours from being emitted into the washroom.  The configuration of the waste pipes usually needs to be changed  as they tend to work best with no traps or u-bends. Urine alone, rather than water or dosing chemical, has to carry away the hair and other debris to the main drain. The valve is the only barrier between the foul smelling drains and the washroom, therefore its effectiveness is crucial to success. There are many valve-based products available, some more reliable than others. To avoid odour problems, the valve has to close after use, having allowed any debris to flow through without becoming stuck. As an additional measure, some products use a microbiological block to treat the urine to help prevent build up in the waste pipes.    

Urine and debris passes through an oil-based barrier fluid which forms the seal to prevent odours reaching the washroom . In some systems, the barrier fluid is contained within a replaceable cartridge that also captures debris that would otherwise fall into the waste pipes. Cartridges typically need to be replaced every 2 to 6 months, dependent on usage. The barrier fluid can be degraded, and need replacement, if incompatible cleaning chemicals are used. Otherwise, barrier systems work very well, although consumable costs may be high for busy washrooms.  Barrier systems are used in several types of urinal bowls designed exclusively for waterless use, the most well known in the UK being Armitage Shanks Aridian .   The latter model is quite popular in new builds. Another popular system is the Uridan , developed in Denmark, widely used across Europe and Australia, and increasingly popular in the UK.  

Urine comes into contact with a block, often housed within a dome inserted into the urinal waste outlet. The block contains a number of active ingredients, including surfactants, but the most important of these is the microbial spores. Once taken down into the trap with the urine, the spores become active beneficial bacteria that 'feed' upon the urine and then multiply. By breaking down the urine into components, the bacteria from the block help prevent the build-up of sludge and crystals that are a major contributing cause to blockages. They also generate an environment hostile to the 'bad' bacteria that cause odours. Providing that some block is present and it contains the appropriate ingredients, then there is no requirement for "odour lock" mechanisms or valves. Appropriate cleaning chemicals must be used and simple but regular maintenance is required. Most importantly, the microbes cannot bre

The most popular waterless technologies fall into 3 main categories. The systems differ in their approaches to combating the problems of odours and blockages that would otherwise result from not flushing.   Microbiological Systems replaceable cartridges use the action of microbes to break down urine into odourless components and use the trap or u-bend as the seal against odour from the drains.  regular sluicing is required to prevent blockages. incompatible cleaning products should not be used, otherwise the system can be disabled, resulting in odours and blockages     Liquid Barrier Systems  replaceable cartridges or in-built traps collect debris to help prevent blockages.   an oil-based sealant floats on top of the urine to prevent odours.   infrequent sluicing is recommended, usually when cartridge is changed or urin

In a laboratory 10 miles east of downtown Los Angeles, a mechanical penis sputters to life. A technician starts a timer as a stream of water erupts from the apparatus’s brass tip, arcing into a urinal mounted exactly 12 inches away. James Krug smiles. His latest back-splatter experiment is under way. Krug is an unusual entrepreneur. Twenty years ago, he was a rising star in the film and television business. He served as a vice president of the Disney Channel in the 1980s and ran a distribution company with members of the Disney family in the ’90s. But 11 years ago, Krug became convinced that the world did not need another TV show. What it needed was a better urinal. His transformation from Hollywood player to urinal evangelist began in 1999 at the Universal Studios Hilton in LA. A business acquaintance of Krug knew that he was interested in exploring new opportunities and arranged a meeting with Ditmar Gorges, a German engineer who fervently believed that flush

Waterless Urinal Mechansim 1. Instead of being flushed down with as much as a gallon of water, urine simply drains through openings in a specially designed plastic cartridge at the bottom of the bowl. 2. The entry chamber contains a blue liquid—a lighter-than-urine long-chain fatty alcohol. Gravity pulls urine through the liquid, but odors and sewer gases are trapped below. 3. As the urine descends through the cartridge chamber, its flow collides with a barrier, which prevents turbulence from displacing the floating sealant. 4. Urine passes beneath the barrier and into the exit chamber. When the urine level reaches the height of the drain, it spills over and empties into the outbound sewer pipe.

Sun Woh Mere Ranjhiya, Yeh Preet Badi Dukhdaayi Ismein Kharcha Jaan Ka, Aur Gum Ki Mile Kamaayi Ni Sa Re Ma Re Sa - 3 Pa Ma Re Sa Ni Sa Re Ma Re Sa… (3) Dil Ke Taar Baj Baj Ke Yaar Kehte Hai Pyaar Mujhe Tujhse Pyaar Dil Ke Taar Baj Baj Ke Yaar Kehte Hai Yaar Aaja ( Ho Mere Yaar Mila Hai Sang Tera Main Shukr Karaan Hardum Tera )… (2) Koi Hor Nahi Hun Kam Mera… (2) Main Teri Dhun Mein ( Main Teri Dnun Mein Kho Gaya Teri Isqh Mein Ranjha Ho Gaya )… 2 ( Jeena Hai Mujhe Jeene Ke Llye Meri Jaan Main Tujhpe Marta Hoon )… (2) Haaye Sadke Soniya

Dhadkane Khaamosh Hain, Kuch Kehti Nahi Yeh Aakhari Alvida Na Ho Chaahate Aankhon Se Behti Nahi Yeh Aakhari Alvida Na Ho Iss Dard Dil Mein, Dil Mein Rehne Do Jo Khauf Hai Aankhon Se, Aankhon Se Kehne Do Dukh Ki Nadi Chup Chaap Behne Do Jo Kehna Hai Tum Dheere Se Keh Do Yeh Aakhari Alvida Na Ho Dhadkane Khaamosh Hain, Kuch Kehti Nahi Yeh Aakhari Alvida Na Ho Sab Yaadein, Jo Baandhe The Bandhan Kaajal, Bindiya, Haathon Mein Kangan Mehki Rehti Thi Menhdi Gaata Rehta Tha Saawan Inn Yaadon Ko Sapno Mein Rehne Do Yeh Aakhari Alvida Na Ho Aakhari Alvida Na Ho

Ho Maa, Ho Maa, Ho Maa Teri Kahaani Mein Jita Tha Beta Tera Tu Hi Bata Kya Jhuta Tha Kissa Tera Aansu Baha Na Maa, Ik Din Yeh Hona Hi Tha Lamha Lamha Jita Jahaan, Ladate Ladate Main Thak Gaya Sone De Maa Main Nahi Jeena… (3) Sone De Maa, Sone De Maa Kabse Hai Tumare Maa Aawaaz Koyi Kabse Andheron Mein Ghar Mera Khoya Kahi Sadiya Huyi Tere Aanchal Mein Soya Nahi Lori Koyi Phir Se Suna Chalate Chalate Main Thak Gaya Sone De Maa Main Nahi Jeena… (2) Sone De Maa Nayyo Jeena Sone De Maa Aakhari Angadaayi, Nind Mujhe Aayi Dheere Dheere Dhundala Sama