ASME A112.19.10-2003 pdf download.DUAL FLUSH DWICES FOR WATER CLOSETS.
1 GENERAL flapper valve: see flush valve. 1.1 Scope This Standard covers physical and performance requirements and test methods pertaining to dual flush devices that are installed within water closet tanks which use 3.5 gpf (13.2 Lpf) or greater volume, to reduce total volumetric water consumption. 1.2 Units of Measurement Values are stated in U.S. customary units and in the International System of Units (SI). The US. customary units shall be considered as the standard. In this Standard, gallons per flush is abbreviated gpf and liters per flush is abbreviated Lpf. 1.3 References The following documents form a part of this Standard to the extent specified herein. Unless otherwise speci- fied, the latest edition shall apply. ACME A112.19.2M, Vitreous China Plumbing Fixtures ACME A112.19.6, Hydraulic Performance Requirements for Water Closets and Urinals Publisher: The American Society of Mechanical Engi- neers (ASME International), Three Park Avenue, New York, NY 10016; Order Department: 22 Law Drive, Box 2300, Fairfield, NJ 07007 1.4 Definitions flow pressure: the pressure in the water supply pipe at the fixture fitting, valve, or water inlet while the fitting valve or water outlet is flowing. fluch tank (gravity type): a device that stores a specified quantity of water. When actuated, it discharges the quantity of water, plus some through-flow from the potable water supply or other acceptable water source for the water closet sanitary service, into the water closet bowl or urinal by gravity. It is often a container for a measured quantity of water, fitted with an inlet valve (ball cock) and a flush valve, and is either wall-hung or close-coupled (with closet bowl).
2.1 Functional Operation When designed for installation in a gravity-type flush tank, the dual flush device shall fit within the tank punching without interference with other operating parts, except for the specific design requirements for modification of the function and operation, with free movement of all parts. Inserts and attachments within the tank shall not restrict the movement or operation of all parts, except for specific limits purposely intended by the design and operating needs of the device(s). The user shall be required to activate the function by actua- tion of the selector control or handle and release; the selected flush mode shall be completed without requir- ing further action or holding by the user.
2.2 Durability The product shall meet the performance requirements of the cycle test in para. 3.2. Materials that are immersed in or exposed to water in the tank shall conform to requirements for longevity and resistance to corrosion, adsorption, and dimensional stability. 2.3 Hydraulic Performance Separate dual flush devices installed in water closet tanks shall meet the hydraulic performance tests in para. 3.3 when tested on two of three different selected sample product water closets submitted for tests or provided by the testing laboratory. If failure of any of the tests occurs, the third water closet and a new dual flush assembly shall be tested. Any added failures of either assembly and/or performance failure of the water closet shall be cause for rejection of the device. Label restric- tions on the installation of the device(s) to any single or group of manufacturers’ water closets shall be speci- fied on a distinctive color caution label on the package or instructions by the manufacturer, producer, or pro- vider of the device(s) in the event of demonstrated fail- ures for those models.
The full displacement of operating requirements for each mode of the open-close test cycles shall be to com- plete the full extent of the motion of parts to their normal functional stop locations. The entire drain and refill modes need not be completed if the full displacement of the operating parts is achieved. The control mechanism shall be cycled in both modes of operation for the normal-flush and reduced-flush volume discharges with 5:l actuations as the ratio for the lower to larger flush discharge; i.e., five consecutive reduced flushes and one normal flush. Upon completion of the cycling period, remove any dams and water from the tank. Place a volume of water in the tank to the previous water level height above the flush valve seat. Allow to stand for 60 * 3 min and observe any leakage of water from the flush valve outlet. 220.127.116.11 Performance Requirement. Not more than 2% of the total measured volume of water in the tank shall leak from the flush valve outlet after the cycling is completed and the unit is allowed to stand for 60 * 3 min. 18.104.22.168 Cycle Testing of the Flapper Valve. The test method and performance requirement of the flush valve assembly shall be conducted for devices that include a flapper valve as part of dual flush system equipment and assembly for installations (see paras. 22.214.171.124 and 126.96.36.199).