Abstract： ASME A112.19.10:2017 pdf download.Retrofit Dual Flush Devices for Water Closets. 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 withi...

ASME A112.19.10:2017 pdf download.Retrofit Dual Flush Devices for Water Closets.

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 hush 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

(j) 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 21CC ± 5C (70F ± 1OF).

(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.

Recommended：