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ASME A112.19.10-2003 pdf download

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). flush valve: a special form of valve located at the bottom of a flush tank used to control the discharge of water from the tank into a water closet or urinal. sanitary: reasonably acceptable appearance and not nec- essarily microbiologically clean. wafer closet: a plumbing fixture having a water- containing receptor that receives liquid and solid body waste and, upon actuation, conveys the waste through an exposed integral trap seal into a gravity drainage system. water savings: the amount of flush volume water reduc- tion in gallons or percentage when comparing consump- tion with and without a dual flush device for a water closet. wafer surface: the surface of the still water in the water cycle firne: the time beginning at the instant the flush release device is operated, and ending at the instant the water supply valve is completely shut off and the water closet bowl when filled to the trap weir, 2 GENERAL REQUIREMENTS stops flowing. dualflush device: a mechanism for control of water closet discharge that provides the user with two options for selective operation with either a normal fill volume or a reduced volume of water from the tank. The dual flush devices are considered to be those which are capable of providing at least 30% reduction in water consumption. Only activation by selection of one option by the user, and a release of the actuation selector, without requiring further action or holding by the user, shall be required. User involvement devices that require further action or holding of the selector control to participate in the pro- cess of maintaining the selected operation mode and flush (single-option flush modifying devices or rapid closure devices) are not covered in this Standard. 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.

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