• ASSE 1011
  • Revision:2017 Edition, November 2017
  • Published Date:November 2017
  • Status:Active, Most Current
  • Document Language:English
  • Published By:American Society of Sanitary Engineering (ASSE)
  • Page Count:24
  • ANSI Approved:Yes
  • DoD Adopted:Yes

  • Description

    This standard applies only to those devices which are designed to be installed on the discharge side of the hose bibb, hydrant, or faucet which is fitted with hose threads. The design embraces a check valve member force loaded, or biased, to a closed position, and an atmospheric vent valve, force loaded, or biased, to an open position when the device is not under pressure. This device shall not be subjected to more than twelve (12) hours of continuous water pressure. This device shall only be used on systems where the only source of low head back pressure comes from an elevated hose equal to or less than 10.0 feet (3.0 meters) in height.


    Sizes shall include ½ NH, 3/4 NH and 1 NH male hose threaded outlets. 


    The devices shall be designed for a working pressure of at least 125 psi (862 kPa). 

    Temperature Range

    The devices shall be designed for flow temperatures of 33 °F to 180 °F (0.56 °C to 82 °C).

    Mechanical Function

    The devices shall be designed for flow temperatures of 33 °F to 180 °F (0.56 °C to 82 °C). 

    Atmospheric Vent

    a) The atmospheric vent shall be open when the supply pressure is at atmospheric as defined in Section 3.7.

    b) The atmospheric vent shall open when subjected to conditions defined in Section 3.9.

    c) The atmospheric vent ports shall be of a size that cannot be threaded for iron pipe size or connected with tubing either internally or externally. 


    a) Devices shall be permitted to be repairable or non-repairable.

    b) All replacement parts of the devices of the same size and model shall be interchangeable with the original parts.

    ASSE 1011

    • Product Code: ASSE
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