RY-EA-EH3 ABS Twin Nozzle Eyewash Spray Head Assembly with Hinged Caps

RY-EA-EH3 ABS Twin Nozzle Eyewash Spray Head Assembly with Hinged Caps

Product Overview

The RY-EA-EH3 is a twin nozzle eyewash spray head moulded in one piece from yellow ABS: a U-tube with two nozzles angled inward, two hinged flip caps joined to the body, and a threaded shank underneath that passes through the eyewash bowl. Because the body, the nozzles and the caps are a single moulding, there are no separate covers to lose and no joints to weep. It is the plastic counterpart to the stainless twin head, supplied as a spare for ABS-bowl stations and for sites that prefer a non-corroding, non-metallic head on a tepid water line.

ABS Instead of Stainless: Where It Wins and Where It Gives

The choice between this head and a stainless one is not about quality; it is about which failure mode a site can live with.

Where ABS wins. It does not corrode, so a station that stands with water in the bowl between tests will not grow rust stains at the nozzle threads. It is light, so the shank does not load a thin bowl or a plastic bracket. It is a single moulding, so the caps cannot be lost and there are no press-fitted parts to work loose. And it is non-metallic, which matters on some chemical lines where a metal head is simply the wrong material.

Where it gives. ABS is temperature-limited. Tepid water in the required band is well within its range, but a station that is flushed with hot water — during a line sterilisation, or because a mixing valve has failed — can soften and deform a moulded plastic head, and a deformed nozzle cannot be re-aimed. It is also vulnerable to impact: a head struck by a drum or a tool can crack at the shank, where the moulding is thinnest. And the threads are plastic, so a shank cross-threaded once will not seal again — the whole head is then scrap.

What that means in practice. This head suits indoor benches, laboratories and general workshops on a controlled tepid supply, where the station is tested weekly and nothing heavy is moved past it. It is the wrong choice for an outdoor station exposed to sun and frost, for a wash-down area where hoses and drums swing about, or for a line that is periodically flushed hot. In those places the stainless version lasts longer for a small difference in price.

The caps are integral, so the hinge is the wear item. Every test flexes both hinges; when one cracks the cap hangs and then drops, and the nozzle is open. That is the one fault worth looking for on every inspection, and it cannot be repaired — the head is replaced.

Key Features

• One-piece yellow ABS moulding: U-tube, two nozzles and both caps in a single part.

• Two hinged flip caps that cannot be separated from the body or lost.

• Nozzles angled inward to give two converging streams at the face position.

• Threaded shank moulded into the body, passing through the eyewash bowl.

• No metal in the head, so no corrosion at the nozzle threads or in the waterway.

• Light weight that does not load a thin bowl or a plastic bracket.

• High-visibility yellow, readable against a stainless or ABS bowl.

• No separate covers, no press-fitted nozzles and no seals between parts.

• Supplied as a complete head, so a station with a cracked shank or a broken hinge is returned to service in one swap.

Technical Specifications

Fitting

1. Isolate the station supply, lock the valve off and operate the station to release pressure before removing the old head.

2. Clean the bowl seat and check the cut-out and the existing backnut and washer are serviceable.

3. Check the thread on the new shank against the bowl fitting by hand first; a plastic thread cross-threaded once will not seal again.

4. Tighten by hand plus a small part turn only — do not use a wrench on the moulded shank, and do not use the nozzles as a lever.

5. Restore the supply slowly, open both caps and confirm the two streams converge at the face position without spraying outside the bowl.

6. Re-check the nozzle height above the floor and the distance from the wall, then record the flow reading with the caps open.

Maintenance and Inspection

Weekly: open both caps, operate the station for at least three minutes and confirm both streams are full and converging; check both hinges for cracking.

Monthly: wipe the caps and nozzle mouths, check the moulding for cracks at the shank and at the hinge roots, and confirm the head is still seated square in the bowl.

Quarterly: check for weeping at the shank and for any softening or discolouration that would indicate hot water has reached the head.

Annually: replace the head if either hinge is cracked, the moulding is chalky or brittle, or the shank no longer seals; a moulded plastic head is not repairable.

Standards and Compliance

This head is a component of an emergency eyewash; the installed station must meet ANSI Z358.1-2014 in full — fifteen minutes of flushing with tepid water at 20–37 °C, hands-free activation, nozzles at the required height above the floor and clearance from the wall, unobstructed access within ten seconds of the hazard, and a controlled twin stream at a velocity the casualty can tolerate. A head replacement does not by itself make a station compliant, and the aim and height must be verified after fitting. Covers must be present and functional at every inspection; an integral cap with a cracked hinge is a finding, not a cosmetic issue. Tepid water also protects the head itself: a station flushed above the tepid band risks deforming a moulded plastic nozzle.

Applications

Replacement heads on ABS bowl stations in laboratories, indoor benches and workshops on a controlled tepid supply; sites where a non-metallic head is preferred for chemical compatibility; and spare-part stock where a complete head swap is faster than cleaning a blocked one.

Ordering

State the model RY-EA-EH3, the shank thread size or the make and model of the bowl it is to fit, and the quantity required. Confirm whether the backnut and washer are to be supplied with the head. If the station is outdoors, exposed to frost or wash-down, or periodically flushed hot, specify the stainless twin head instead — the ABS moulding is the right part for an indoor tepid-water station and the wrong one for those conditions.