From: Don Abramowitz <dabramow**At_Symbol_Here**BRYNMAWR.EDU>
Subject: Re: [DCHAS-L] Built in eyewash drainage alternatives?
Date: Wed, 5 Aug 2015 09:54:41 -0400
Reply-To: DCHAS-L <DCHAS-L**At_Symbol_Here**MED.CORNELL.EDU>
Message-ID: 967142130.69860629.1438782881442.JavaMail.root**At_Symbol_Here**zimbra-mailbox
In-Reply-To <165C533F-8352-4A74-ADEA-42B9539C1313**At_Symbol_Here**>

I have a simple plumbing-gadget solution to this.  I wish I could include a drawing.  Instead, here are a thousand words, hopefully less:

Have your Facilities folks put together the following assembly, made of the same diameter as the existing drain pipe:   What you want is a short length of horizontal pipe connected a 90 degree elbow and then about a foot long* piece of pipe (to be oriented vertically, then another short horizontal piece, then another elbow pointing down..  You would attach this assembly to your existing outlet.  This will allow you to put a bucket under the last elbow.

At the end where you attach this to the existing drain, install half of a union-type pipe coupling joint.  Attach the other half permanently to the existing drain.  You will  need a short stub of pipe to make this connection and to give you a little clearance from the wall for the coupling.  (This will come in handy in a minute.)  Put this same sort of half-of-a-union coupling on all of your eyewashes.  Then, you can go around, hand tighten the above contraption to each of your eyewashes in turn, fill up a bucket, and then disconnect  and go on to the next one.    (*Make that  ~ foot-long piece just long enough to accommodate your bucket, based on how far from the floor the existing outlet.)

The only downside, and it's significant, is that the water left in the vertical parts of the piping will be stuck there and will drain out when you unscrew the contraption.  So, you will still need a small pan to catch this water when you unscrew this thing, and that's why you want that short extension from the wall on your permanently-mounted half of the coupling.   Hope this all makes sense, and bring a roll of paper towels along anyway.

Why were the outlets on these not piped into the floor drain line or a drain line for a nearby sink?  This sounds like improper installation by the building contractor.

Digging up the floors to do it now would be a royal pain, but maybe you can connect into a lab sink drain line nearby.  I'd bring in your Physical Plant folks or a plumbing contractor to see if that's feasible.

Otherwise, the only possible way out I could think of would be to put some small basins under the outlet and rig up an inexpensive pump such as a air conditioning condensate pump, and run tubing along the wall to a sink.  A hack, and not a pretty one.

Are these Bradley or Guardian units?  If Guardian, send me some pics off list and I can get you a contact over there who might be able to offer ideas.


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On Aug 5, 2015, at 8:24 AM, "Stuart, Ralph" <Ralph.Stuart**At_Symbol_Here**KEENE.EDU> wrote:

Another question from this week's lab inspections:

We have a 2004 Science building with eyewashes built into the wall (similar to the design found at  ).. When the eyewash is activated, the water flows back into the drain in the wall and then expelled onto the floor under the eyewash in an ever-growing puddle. My immediate concern is that the water comes out of a pipe which is between 6 and 10 inches from the floor. (There is a floor drain in the area of the pipe which serves the safety shower as well.) The imedidate problem is that location of the drain pipe is low enough that collecting water from it when flushing the eyewash is difficult; we currently use a secondary containment bin tipped under the pipe in such a way that we're able to collect about 1/3 of the capacity of th!
e bin.

I wonder if anyone on the list has developed a modification to this design that is reasonably priced (we're talking about 20 units with this condition) that would allow for collection of the flush water in a way that is convenient for the person conducting the flushing? This design also presents challenges for the emergency eyewash use case, but that's not my primary motivation in considering modifications; I'm more concerned with enabling more frequent flushing of the eyewashes.

Thanks for any experience with this question.

- Ralph

Ralph Stuart, CIH, CCHO
Chemical Hygiene Officer
Keene State College


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