Draft Details

Designation:Z21.41/CSA 6.9
Contact name:Jennifer Hess
Review start date:Jan 9, 2023
Review end date:Mar 10, 2023
Contact email:kelly.yaremko(at)csagroup.org
Associated materials (click link to download). You will need to be logged in to download any files:
Draft Scope/Description:

1.1 Inclusions

This Standard applies to newly-produced, hand-operated quick-disconnect devices, sizes NPS 1/8 inch to 1-1/2 inch, hereinafter also referred to as devices, constructed entirely of new, unused parts and materials which provide a means for connecting and disconnecting appliances or appliance connectors to gas supplies and which are for indoor and outdoor applications. These devices are equipped with automatic means to shut off the gas when the devices are disconnected.


1.2 Applicable fuel gases & Pressure references

This Standard applies to quick disconnect devices for use with natural, and propane gas having maximum gas pressure ratings of ½ psi(3.5 kPa)  up to and including 30 psi (207 kPa). A manufacturer must specify what pressure will be marked on the product.. All references to psi (kPa) throughout this Standard are considered as gauge pressure unless otherwise specified.


Rational: Certification agencies have safety concerns during testing specifically with the larger size devices. Due to the higher pressure and increase volume of gas on the larger sized devices the disconnection force has become too high for the testing apparatus to contain the plug if a malfunction occurs. It should also be noted that the appliances certified by the CSA group of standards usually max out at 30 PSI. Propane can start to reliquefy at 30 PSI and above. The name of this Standard is “Quick disconnect devices for use with gas fuel appliances” not gas equipment or industrial machines.


1.3 Temperature

This standard applies to quick disconnect devices which are capable of operation at ambient temperatures between 32 and 200°F (0 and 93.3°C) if intended for indoor use only, or  -40° and 200°F (-40° and 93.3°C) if intended for indoor/outdoor use.

Rationale: A manufacturer of a quick disconnect device or gas hose connector that sells their product to an OEM customer cannot control the distribution of their product once packaged or used in conjunction with their customer’s product. Per the B149 Canadian building code, a product such as a quick disconnect device and or gas hose connectors must be rated to -40F for outdoor use.  Allowing -20F coverage in a manual valve standard and or connector standard is a direct violation of the Canadian building code. Also allowing this coverage could put the appliance used in conjunction with the -20 product in violation as well.

1.4 Manually operated valve provisions

Clause 4.1.3 contains provisions for quick disconnect devices that incorporate manually operated valves.

1.5 International provisions

Clause 7 contains provisions that are Unique to Canada.

1.6 References

Clause 2 contains a list of standards specifically referenced in this Standard and sources from which these reference standards may be obtained.

1.7  Mandatory language

In this Standard, “shall” is used to express a requirement, i.e., a provision that the user is obliged to satisfy in order to comply with the standard; “should” is used to express a recommendation or that which is advised but not required; and “may” is used to express an option or that which is permissible within the limits of the Standard.

Notes accompanying clauses do not include requirements or alternative requirements; the purpose of a note accompanying a clause is to separate from the text explanatory or informative material.

Notes to tables and figures are considered part of the table or figure and may be written as requirements.

Annexes are designated normative (mandatory) or informative (nonmandatory) to define their application.

1.8 Measurement units

The values given in SI units are the units of record for the purposes of this Standard. The values given in parentheses are for information and comparison only.

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