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ASSE 1019

Performance Requirements for Wall Hydrant with Backflow Protection and Freeze Resistance

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Organization: ASSE
Publication Date: 1 July 2011
Status: active
Page Count: 24
scope:

Description

These devices shall have a permanent means to protect against backflow due to either backsiphonage or backpressure. The backflow protection shall include a minimum of two (2) mechanisms: an air inlet for preventing backsiphonage and a check valve for preventing backpressure backflow. These devices are terminal fittings that supply potable water to hose connections without danger of freezing.

These devices shall be used on systems where the only source of low head backpressure comes from an elevated hose equal to or less than 10.0 feet (3.0 meters) in height. The outlet of this device shall not be subjected to more than twelve (12) hours of continuous water pressure.

The devices shall be classified as follows:

(a) Type A devices protect against backsiphonage and backpressure. The backflow protection shall include three (3) mechanisms: 1) an air inlet for preventing backsiphonage, 2) a check valve for preventing backpressure backflow and 3) a mechanism that relieves backpressure backflow. The hose shall be removed to prevent damage to the device from freezing.

(b) Type B devices protect against backsiphonage and backpressure. The backflow protection shall include three (3) mechanisms: 1) an air inlet for preventing backsiphonage, 2) a check valve for preventing backpressure backflow and 3) a mechanism that relieves backpressure backflow and a mechanism that drains the water from the hydrant when the hose is attached and the hydrant is manually closed. The hose need not be removed to protect the device against damage from freezing.

(c) Type C devices protect against backsiphonage and backpressure. The backflow protection shall include two (2) mechanisms; 1) an air inlet for preventing backsiphonage and 2) a check valve for preventing backpressure backflow. The hose shall be removed to protect against damage to the device from freezing.

Document History

ASSE 1019
July 1, 2011
Performance Requirements for Wall Hydrant with Backflow Protection and Freeze Resistance
Description These devices shall have a permanent means to protect against backflow due to either backsiphonage or backpressure. The backflow protection shall include a minimum of two (2) mechanisms:...
July 1, 2011
Performance Requirements for Wall Hydrant with Backflow Protection and Freeze Resistance
Description These devices shall have a permanent means to protect against backflow due to either backsiphonage or backpressure. The backflow protection shall include a minimum of two (2) mechanisms:...
February 1, 2004
Performance Requirements for Vacuum Breaker Wall Hydrants, Freeze Resistant, Automatic Draining Type
Description These devices are to supply potable water without danger of damage to the device due to freezing & to provide protection of the potable water supply from contamination due to back...
February 1, 2004
Performance Requirements for Vacuum Breaker Wall Hydrants, Freeze Resistant, Automatic Draining Type
A description is not available for this item.
September 1, 1997
Performance Requirements for Vacuum Breaker Wall Hydrants, Freeze Resistant, Automatic Draining Type
Description This standard covers design and performance requirements for water supply system wall hydrants. These units shall have a permanent means including atmospheric vent valve(s), to prevent...
January 1, 1993
Performance Requirements for Vacuum Breaker Wall Hydrants, Freeze Resistant Automatic Draining Type
A description is not available for this item.

References

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