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Emergency safety showers and eye/face wash equipment must be fed from a potable water supply – drinking water or water
of a similar quality.
Minimum Supply Pressure: 29 PSI (2 bar G)
Maximum Supply Pressure: 87 PSI (6 bar G)
Where a high unregulated pressure is experienced, this must be monitored to ensure it does not exceed the recommended
maximum. If the water pressure exceeds the recommendations, please contact Hughes Safety Showers for advice.
The water supply pipe must be of a material compatible with the safety shower and/or eye/face wash equipment to avoid
corrosion.
The supply pipe should have at least the same diameter as the inlet pipe on the equipment.
If required, the supply pipe should be fitted with a non-return check valve.
Minimum flow rates must be in accordance with International standards, namely ANSI Z358.1-2014.
Water inlet size: Please refer to your general arrangement drawing for details.
Good practice:
Fit isolation valves to the supply pipes in an accessible position for use during maintenance. These valves
should have locking mechanisms to prevent unauthorised shutoff and be labelled accordingly with fixed permanent tags.
Installation of eye and eye/face washes
Water supply and supply pipe materials
Prior to initial operation it is advisable to remove the “Y” strainer filter basket, where fitted, along with the diffusers to ensure
they are free of any debris. Once refitted, test to verify proper operation. (see figs. 1, 2, 3 and 4)
If fitted, the Y strainer head is removed, using a 22mm box spanner or socket, the gauze filter can also be removed and
cleaned. (see fig. 1)
If necessary, the flow rate of the eye/facewash diffusers be adjusted via the three-pronged regulator or using the grub
screws on each side of the tee-piece in the centre of the eye/facewash bowl. A 4mm allen key will be required for this
adjustment. (See fig. 5) or via the flow regulator knob on the side of the eyewash. (See fig. 3)
Fig. 5
Fig. 1
Fig. 2
Fig. 3
Fig. 4
