Installation and Maintenance
What incoming water supply pipe size should be used when installing eyewash or drench showers?
According to the ANSI/ISEA Z358.1 standard, the minimum flow rate requirements are defined below, the pipe size is based on Bradley fixtures:
- Eye/Face Wash (.4gpm/3gpm @ 30 PSI)=½" incoming supply pipe
- Drench Shower (20gpm @ 30PSI) = 1" Incoming supply pipe
- Combination Drench Shower & Eyewash = 1¼" incoming supply pipe
Note: If the pipe size is too small, inadequate flow will be delivered and the unit will not provide enough flushing fluid.
How should I maintain my emergency fixture?
The ANSI/ISEA Z358.1 standard requires that emergency fixtures be tested on a weekly basis to ensure the lines are clear of sediment and debris. ANSI/ISEA Z358.1 also states that each facility should conduct an annual inspection to be sure they are compliant, as work stations may have changed and new hazards may be present.
Bradley provides complimentary annual inspections. (1-800-BRADLEY (1-800-272-3539))
How can I increase my emergency fixture's water pressure?
First identify the source of the low pressure, which may be: incorrect pipe sizing, a system design issue, an improperly sized emergency thermostatic mixing valve, instantaneous water heater or an obstruction in the line, such as pipe dope, which occasionally accumulates at the flow restrictor on eye or eye/face washes. Another possible cause of low flowing pressure is due to inadequate source supply pressure, perhaps requiring an up-sized Water Service or a Domestic water booster system. A flowing pressure of 30 PSI (or 2 BAR) is required at the fixture supply connection. When installing an emergency thermostatic mixing valve, Bradley recommends the 20 GPM flow restrictor (S19-866, S19-866SS) for proper operation. With the restrictor in place, the design flow may be determined as given online by Bradley's Emergency TMV sizing program.
Please Note: Weekly testing will help alleviate debris accumulation. Testing the drench shower before the eyewash on a combination unit will promote the removal of larger debris through the shower that may otherwise accumulate at the more restrictive eyewash device.
Should water spray out of the bowl when the unit is activated?
Inspect your fixture and be sure that the flow control is still positioned properly. If you own an eyewash or eye/face wash with a spray ring, your flow control will be located in the stem assembly. If you own a dual black head eye/face wash, the flow control is located inside each sprayhead. You may also soak your fixture's yoke in vinegar to remove lime deposits and build-up. Be sure to rinse with vinegar before reinstalling. Build-up causes the water to spray higher, similar to the effect when you place your finger over a garden hose.
Can spray heads be interchanged on Bradley eyewash units?
In most cases, sprayheads can be easily switched between standard eyewash and eye/face wash sprayheads. Bradley offers a few options for spray head and spray ring assembly replacement, however we recommend contacting customer service for direction on which parts to order and what components may need to be removed from the existing unit to be completely functional
Can I reconfigure a top supply fixture to become a bottom supply?
No. Relocating the supply voids the manufacturer's warranty. The supply should not be relocated in the field; it presents a risk of freezing due to the configuration of the pipes and the location of the freeze valve.