I remember seeing a manufactured Air Gap for a dishwasher which mounts under the counter. Now that I’ve told my customer about it- I cannot find one. Do any of you know where this beast might be found?
Thanks,
Serious Fun
I remember seeing a manufactured Air Gap for a dishwasher which mounts under the counter. Now that I’ve told my customer about it- I cannot find one. Do any of you know where this beast might be found?
Thanks,
Serious Fun
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Replies
If you can't find them - check your codes - I am building in NH and found none in MA (called Air Admittance Valve). Since they appear to not be allowed by the MA codes - they are readily available in NH - Oatey makes on and the cheap ones are available at HD etc.
I could be wrong and that would be no surprise.
However, AAValve is not the same as the air gap fitting you require.
Can't help you on where to find the undercounter type. Not general use here in NW Oh. for an air gap on DW's.
A great place for Information, Comraderie, and a sucker punch.
Remodeling Contractor just outside the Glass City.
Quittin' Time
Air gap for a dishwasher, What about looping the drain hose to make an air gap/trap under the sink? I've only ever seen them on top of the sink.
Grunge on.
every air gap I've seen leaks water at some point - I'd put it somewhere visible.
code dropped the air gap requirement a few years back here in MD
why not skip it? (if you can)
For personal information, what counties in Md. dropped their requirement for air-gaps?
I'm in Washington County - it was dropped 7 or 8 years ago.
Treat every person you meet like you will know them the rest of your life - you just might!
I am not sure, but I think that it called a Johnson Tee or indirect drain.
http://www.theplumber.com/jtee.html
http://www.bradandkathy.com/photos/remodel/4/source/17.html
http://www.terrylove.com/wwwboard/messages2/32153.html
yeah, you want to keep the air gap on top of the counter for when it starts to spit water. I used the method of running it up to the underside of the counter top as described on this board... it works great, and there is no mess when it backfires.
First check your local codes.
If they require an air gap it is so there is no direct connection between the dw & the waste pipe. They must have the flood level 1" above the flood level of the sink.
Do you look to the government for an entitlement, or to GOD for empowerment. BDW
Bill: I pulled out an old (very old) d/w last week and it had a little blue plastic backflow preventer in its drain line. Looked like something that would cost less than or at least not more than an air gap and would fulfill the same purpose with a lot less trouble.
Actually, to really make sure no d/w water gets in the supply, there should be a flapper on the outlet side of the supply (I'm thinking just put a plastic backflow preventer in the hose between the fill valve and the tub).
Anyway, any idea why the drain line backflow preventer didn't catch on? Seems cheaper and easier than an air gap.
"A job well done is its own reward. Now would you prefer to make the final payment by cash, check or Master Card?"
what states require air gaps?South Carolina never has. Everyone here routes the hose up under the counter
It's not so the DW flows back into the potable water . It's so the waste water can't back-up onto clean dishes.
That's why commercial DW's drain into a floor sink with a min 1" gap above the sink.Do you look to the government for an entitlement, or to GOD for empowerment. BDW
>>It's so the waste water can't back-up onto clean dishes.
Oh, now I get it.
But still, why not a backflow check in the d/w drain line. Still seems like less trouble than an air gap.
"A job well done is its own reward. Now would you prefer to make the final payment by cash, check or Master Card?"
Check valve could get stuck open
& you wouldn't know untill there was a problem
Air gap fitting if somethin goes wrong with it you usually know by the water spitting out all over the counter.Do you look to the government for an entitlement, or to GOD for empowerment. BDW
A plumber on one job told me most of the european dishwashers have a built in air gap. He also said he still puts in the air gap as the bldg inspector won't be satisfied without it regardless of how much paperwork you have showing it is not needed.
That may be a misnomer, years ago all dishwahers were hooked up with a high drain loop, many munufactors at that time referred to it as a air-gap.
I recall that a recent Fine Homebuilding magazine issue (within the past year or so) had an article about constructing or installing interior air gaps where it was impossible to tie into the existing home vent system. I looked for the issue but couldn't locate it - the grandkids were over recently and, it seems, a couple of the older boys must have gone through them and then not replace them in order. I'll try to keep a lookout for it, but you might try searching for it in the article index or visit you local library to read it if you don't subscribe yourself.
I found the article in Fine Woodworking that I had mentioned earlier.
It's contained in FW #174 from November/December 2005 starting at page 56. Aside from purchasing the air gap, it seems to be pretty straight forward plumbing using pvc pipe.
Good luck.