ASME A112.19.10:2017 pdf download

ASME A112.19.10:2017 pdf download.Retrofit Dual Flush Devices for Water Closets
1 GENERAL
1.1 Scope This Standard establishes physical, material, testing, and marking requirements for retrofit dual flush devices that are installed within gravity-type water closet tanks and have a full flush volume of 4.8 Lpf (1.28 gpf) or greater volume. 1.2 Units of Measurement The values stated in either SI (metric) or U.S. Customary (inch/pound) units of measure are to be regarded as the standard. In this Standard, the inch/pound units are shown in parentheses. The values stated in each measurement system are equivalent in application; however, each system is to be used independently. Combining values from the two measurement systems can result in nonconformance with this Standard. All references to gallons are to U.S. gallons. 1.3 References The following document forms a part of this Standard to the extent specified herein. Unless otherwise specified, the latest edition shall apply. ASME A112.19.5/CSA B45.15, Flush Valves and Spuds for Water Closets, Urinals, and Tanks Publisher: The American Society of Mechanical Engineers (ASME), Two Park Avenue, New York, NY 10016-5990 (www.asme.org) 1.4 Definitions cycle time: 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 stops flowing. dual flush 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.flapper valve: see flush valve. flowing pressure: the pressure in a water supply pipe at the inlet to an open valve. flush tank (gravity type): a vessel that stores a predetermined quantity of water and includes a flushing device to discharge water (plus some through-flow from the water supply line) into a water closet bowl or urinal. NOTE: A common type of flush tank is a wall-hung vessel or a vessel close-coupled with the water closet bowl that is fitted with a fill valve and flush valve. flush valve: a valve located in a flush tank and used to flush a fixture by discharging water into the fixture. sanitary: reasonably acceptable appearance and not necessarily microbiologically clean. water 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 reduction in gallons or percentage when comparing consumption with and without a dual flush device for a water closet. water surface: the surface of the still water in the water closet bowl when filled to the trap weir.
2 GENERAL REQUIREMENTS
2.1 Functional Operation The flush valve with dual flush feature shall be designed for retrofit use in water closets and shall fit within the tank punching without interference with other operating parts. The user shall be required to activate a full or reduced flush by actuation of the selector control. After release, the selected flush mode shall be completed without requiring further action or holding by the user. 2.2 Flush Valve The flush valve shall meet the following requirements of ASME A112.19.5/CSA B45.15: (a) rated temperature (b) threads (c) overflow tube (d) thread torque test (e) fixture and flush valve leak test (f) leak rate and chemical resistance test
3 TESTING
3.1 Life Cycle Testing The flush valve with dual flush device shall be evaluated for durability. The life cycle test shall be conducted as follows: (a) Install the specimen with a minimum sustained water head of 150 mm (6.0 in.) at 21°C ± 5°C (70°F ± 10°F). (b) Operate the specimen and allow it to return to its closed position for 30,000 cycles using a sequence of reduced to full flushes in a ratio of 1:4. After completing 30,000 cycles at a ratio of 1:4, immediately begin 120,000 cycles in the reduced flush volume mode.