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ASSE 1002

Performance Requirements for Anti-Siphon Fill Valves for Water Closet Tanks

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Organization: ASSE
Publication Date: 28 April 2008
Status: inactive
Page Count: 18
scope:

Description

These devices are cold water supply valves that are installed within water closet tanks to provide tank refill and a trap reseal after flushing a water closet. They are equipped with backflow prevention devices or an air gap.

Working Pressure

The device shall be designed to operate at a minimum pressure range of 20.0 psi to 125.0 psi static (137.9 kPa to 861.9 kPa).

Capacity - Total Fill and Refill

Original Equipment Manufacturer

When the device is furnished as original equipment with a manufacturer's water closet, the total flow capacity shall be sufficient to assure proper operation of the fixture in accordance with the performance standard, ASME A112.19.2. The device shall deliver a fill rate through the refill orifice as required by the water closet manufacturer.

Retrofit Use

When the device is furnished to retrofit water closets, the device shall deliver a minimum flow rate at 15.0 psig (103.4 kPa) flowing pressure of 1.5 GPM (5.7 L/min), and a minimum refill flow rate, through the refill orifice, of 20% of the total fill rate at 15.0 psi (103.4 kPa) flowing pressure.

Leakage and Spray Containment

The device shall not spray or otherwise leak water to the outside of the water closet tank during operation.

Backflow Prevention

The device shall be equipped with a means to prevent backflow due to back siphonage. Air inlet ports shall be protected in such a manner as to reduce the risk of the intake of foreign material into the device.

Refill Tube

A means shall be provided to secure the refill tube in its installed position.

Dimensional Criteria for Fill Valve Components

Dimensions for shanks, coupling nuts and locknuts shall be as shown in Figure 1. Thread dimensions shall be 15/16-14 UNS-1 per ASME/ANSI B1.1. See Appendix A.

Document History

January 1, 2020
Anti-Siphon Fill Valves for Water Closet Tanks
This Standard covers anti-siphon fill valves intended to be installed in water closet tanks. Note: In this Standard, anti-siphon fill valves are also referred to as “devices”. In this Standard,...
January 1, 2015
Anti-Siphon Fill Valves for Water Closet Tanks
This Standard covers anti-siphon fill valves intended to be installed in water closet tanks. Note: In this Standard, anti-siphon fill valves are also referred to as “devices”. In this Standard,...
ASSE 1002
April 28, 2008
Performance Requirements for Anti-Siphon Fill Valves for Water Closet Tanks
Description These devices are cold water supply valves that are installed within water closet tanks to provide tank refill and a trap reseal after flushing a water closet. They are equipped with...
January 1, 1999
Performance Requirements for Anti-Siphon Fill Valves (Ballcocks) for Gravity Water Closet Flush Tanks
A description is not available for this item.
January 1, 1986
Performance Requirements for Water Closet Flush Tank Ball Cocks
A description is not available for this item.

References

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