ANSI Z 358.1 Changes Explained

Recently ANSI made a few changes to their Z 358.1 Standard.  The most recent version is listed as ANSI Z358.1-2009 and is very similar to previous revisions with a few minor changes and clarifications.  Notable changes include:

  • Clarification: Pressure is called out as Flow Pressure:
    • The pressure in the water supply pipe near the water outlet while the faucet or outlet is fully open and flowing.
  • Installation: Installer is referred back to the manufacturer for specifics:
    • 6.4.5  Be connected to a supply of flushing fluid per the manufacturer’s installation instructions to produce the required spray pattern for a minimum of 15 minutes.
  • Shower Section 4: Provision added to support booth or column showers.  The word Shower head has been removed, instead the new installation verbiage is as follows:
    • 4.5.4  Be positioned so that the shower pattern is dispersed such that the top of the flushing fluid column is at least 208.3 cm (82 in) & not more than 243.8 cm (96 in) from the surface on which the user stands.  The center of the spray shall be at least 40.6 com (16 in.) from any obstruction.
  • Eyewashes Section 5:Change in test pattern – same template, only new restriction for testing as follow:
    • 5.1.8  Eyewashes shall provide flushing fluid to both eyes simultaneously.  A test gauge for making determination of a suitable eyewash pattern shall be a minimum 10.16 com. (4 in) in length with two sets of parallel lines equidistant from the center (See Illustration 7)  The interior set of lines shall be 8.26 cm (3.25 in) apart.  Place the gauge in the stream of the eyewash.  The flushing fluid shall cover the area between the interior & exterior lines of the gauge at some point less than 20.3 cm. (8 in)

  • Eye Face Wash Section 6: Same change in spray pattern as Eyewashes & addition of Self-Contained section
  • Combination Units Section 7: New emphasis added for simultaneous operation
  • Appendix B7: Weekly Activation for Plumbed Emergency Shower & Eyewash Equipment
    • The intent of the weekly activation to be conducted on plumbed emergency eyewash &  shower equipment is to ensure that there is a flushing fluid supply at the head of the device & to clean the supply line of any sediment build-up that could prevent fluid from being delivered to the head of the device & minimize microbial contamination due to stagnant water.  The duration of this test is dependent on the volume of water contained in the unit itself & all section of pipework that do not form part of a constant circulation system (also known as “dead leg” portions).  Water in these sections is stagnant until a flow is activated by opening a valve.  The goal is to flush out stagnant water in the dead leg completely.  Where mixing valves are used, both the hot water & cold water supplies to the valve must be considered.

Speakman Emergency Equipment is fully compliant with the requirements of the new revision.

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