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Urinal flushometer [Vacuum Breaker]

M

MechanicalPiper

Member
Joined
Jan 6, 2013
Messages
24
Location
Seattle, WA
So last minute my customer found urinals he liked much better (than the ones I roughed-in for). He sent me the specs, I said fine as they seemed interchangeable. Come trim time, the urinals are taller than the specs he sent making the top of urinal to vacuum breaker 4 7/8". Is the 6" a no compromise rule, or would an inspector show a little leniency here?

-- Note II, TapaTalk II--
 
No exceptions here.......we enforced it on a new city facility a few years back, as mentioned, sounds like a change order. This isn't an alternate methods/materials, code says 6", pretty clear. JMHO
 
Re: Urinal flushometer [Vacuum Breaker]

Thanks for the replies. It's a solid slab of granite on the wall, so the only real option would be to go back to the original urinal as opposed to raising the water height. It's a shame as the urinals he got are really amazing looking, and the original ones are nothing special.

Can anyone point me to the exact reasoning behind the 6 inches? Just out of curiosity I've been searching the internet for the functional differnces between a 5" length and a 6" length but haven't found anything very detailed. I understand the principle of the vacuum breaker, just wondering how yhe height affects this purpose.

-- Note II, TapaTalk II--
 
I don't know either, but it is what the code says. When we encountered the new city building defiency, we told the contractor if he could get the manufacturers engineers to give us a letter buying off on it, it did not happen, the manufacturer would not do it.
 
MechanicalPiper said:
So last minute my customer found urinals he liked much better (than the ones I roughed-in for). He sent me the specs, I said fine as they seemed interchangeable. Come trim time, the urinals are taller than the specs he sent making the top of urinal to vacuum breaker 4 7/8". Is the 6" a no compromise rule, or would an inspector show a little leniency here?-- Note II, TapaTalk II--
Click to expand...
A 12 inch rough flush valve will come with a 9 inch vacuum breaker tube. Cut it to fit. The 6 inch minimum is to the flood level rim of the fixture. On your urinal that will probably be about 30 inches bellow your vacuum breaker.
 
MechanicalPiper said:
So last minute my customer found urinals he liked much better (than the ones I roughed-in for). He sent me the specs, I said fine as they seemed interchangeable. Come trim time, the urinals are taller than the specs he sent making the top of urinal to vacuum breaker 4 7/8". Is the 6" a no compromise rule, or would an inspector show a little leniency here?-- Note II, TapaTalk II--
Click to expand...
A 12 inch rough flush valve will come with a 9 inch vacuum breaker tube. Cut it to fit. The 6 inch minimum is to the flood level rim of the fixture. On your urinal that will probably be about 30 inches bellow your vacuum breaker.
 
Gregg Harris said:
A 12 inch rough flush valve will come with a 9 inch vacuum breaker tube. Cut it to fit. The 6 inch minimum is to the flood level rim of the fixture. On your urinal that will probably be about 30 inches bellow your vacuum breaker.
Click to expand...
Soooooo.....more for a W/C than a urinal........that makes a little more sense.....
 
MechanicalPiper said:
I'm UPC code here, and the code reads 6" from the highest part of a urinal.-- Note II, TapaTalk II--
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Poorly written.The intent is there but poor wording. The purpose of the vacuum breaker is to prevent back siphoning, and if the water level reaches the top of the urinal there are worse problems than cross contamination.
 
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Re: Urinal flushometer [Vacuum Breaker]

I'm also of the belief that the ADA urinal should have the flushometer lower than the 6" to make it more accessible. Keeping the rim @ 17", and then following the 6" minimum rule puts the handle at 47.5"...which is higher than any other ADA height that I know of.

-- Note II, TapaTalk II--
 
48" is usually the top of the reach range.......but then again...I have never considered the urinal as an obstruction........

MechanicalPiper said:
I'm also of the belief that the ADA urinal should have the flushometer lower than the 6" to make it more accessible. Keeping the rim @ 17", and then following the 6" minimum rule puts the handle at 47.5"...which is higher than any other ADA height that I know of.-- Note II, TapaTalk II--
Click to expand...
 
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Re: Urinal flushometer [Vacuum Breaker]

I guess I will find out @ inspection time. There's 2 inspectors that could show up. I know 1 of the inspectors for this area knows the code book inside and out, and doesn't allow for anything beyond exactly what is written. He will notice this for sure. I guess we will see if he sticks with the wording of the text this time also, or sees that the fundamental function we're trying to accomplish [backflow prevention] is achieved.

BTW, this is the same inspector that refused to allow wall cover on a job [when I was out of town, and couldn't easily perform his listed correction] because the joist layout made my hangers for ABS pipe [a 2" vent, will never have water in it] every 4' 3/4", as opposed to the required 4'. I quite literally had to get a scissor-lift delivered again and add hangers. The other inspector came out for the re-inspection and couldn't believe the original inspector wrote that up.

-- Note II, TapaTalk II--
 
fatboy said:
I don't know either, but it is what the code says. When we encountered the new city building defiency, we told the contractor if he could get the manufacturers engineers to give us a letter buying off on it, it did not happen, the manufacturer would not do it.
Click to expand...
In regard to that situation, did you want the letter from the engineer of the urinal, the flushometer, or both?

Thanks in advance. I would like to be a little prepared for this one.
 
I'm wondering if something like this will be acceptable, since we all understand the idea trying to be accomplished by the vacuum breaker. Any inspectors care to weigh in on if this would enough to bring with me to the inspection?Thanks again.

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While I agree with the explanation in the jpeg, I don't know if it will carry the day. We were looking for a buyoff from the flushometer manufacture, it was their CL mark on the flushometer.

Keep us posted......
 
fatboy said:
While I agree with the explanation in the jpeg, I don't know if it will carry the day. We were looking for a buyoff from the flushometer manufacture, it was their CL mark on the flushometer.

Keep us posted......
Click to expand...

Just installed a new blowout American standard at a local bar because they have been having issues with the old washout getting clogged. There was a height difference of 1 1/2". The new urinal has an 1 1/4" top Spud as opposed to the 3/4" the old one had. Here's the issue... At the end of the flush the vacuum breaker pisses water out the holes on top. The length of the vacuum breaker tube is 5 inches, only 4 inches from the line on the tube to the top of the urinal. I have tried 4 different vacuum breakers and just about everything I can think of. Will changing the height of the valve (a longer vacuum breaker leg) fix my problem?
 
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