ASME A112.19.10-2017 pdf – Retrofit Dual Flush Devices for Water Closets.
1.2 Units of Measurement
The values stated in either SI (metric) or U.S. Customary (inc-hfpound) 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 Al 1Z193/CSA 114515, 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 (
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 tsr 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 votve: see flush valve.
flowing pressure: the pressure in a waler supply pipe at the inlet to an open valve.
flush tank (gravity type): a vessel that stores a predetermined quantity otwater and includes a flushing device to discharge water (plus some througli’flow from the water supply line) into a water closet bowl or urinal.
NOTE: A common type of Bush tank isa wall-hung vessel or a vessel close-coupled with the water closet howl that is fitted with a fill valve and (lush 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 cAster: a plumbing fixture having a water-containing receptor that receives liquid and solid hody 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 companng consumption with and without a dual flush device For a water closet
watersurface: the surface oF the still water in the water closet bowl when filled to the trap weir,
2.1 Functional Operation
The flush valve with dual flush feature shall be designed for retrofit use In water dosets 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. Alter 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 oIASME Al 12.19.5/CSA 1145.15:
(a) rated temperature
(b) threads
(c) overflow Lube
(d) thread torque test
(e) Axture and flush valve leak test
(0 leak rate and chemical resistance test
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 ntlnlmum sustained water head of ISO mm (6.0 In.) at 21C a 5C (709 a l0F).
(b) Operate the specimen and allow It to return to its dosed position for 30.000 cydes 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 hush volume mode.
3.2 Performance Requirements
Dunng and after the test, dual flush devices shall
(a) continue to function as they did at the beginning of the test
(b) show no signs of k’.ikagr
(c) not develop any defects that might adversely affect their functionality or serviceability
4.1 Markings
Retrofit dual flush devices shall be marked with the manufacturer’s name and/or registered trademark or, in case of private labeling, the name for whom the device was manufactured.