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islepilot
18-09-2008, 03:54 PM
I am supporting a wall mount air conditioner in Japan and an HVAC tech there suggested we add something he called an "Air Cut Bulb" to the end of the condensation removal drain line which lets water drain out but then closes to prevent humid air from being sucked back into the system.

Does anyone know what this device might be called in the U.S.? I can't find anything that seems to be what they are suggesting.

Thanks!

Keith

Daddy Cool
18-09-2008, 04:16 PM
Do they mean a Hepv0?

http://content.wavin.com/__802571EF003CF447.nsf/0/990E1309736901188025729F003BF54E/$FILE/HepvO_Product_Guide.pdf

chemi-cool
18-09-2008, 08:13 PM
May be you have seen a water U trap?

Daddy Cool
19-09-2008, 08:12 AM
i'm guessing that as it was described as a valve, and had the facility to close after it was a Hepv0 (to those in the UK a fanny trap, just the not the US version of fanny)

thermo prince
19-09-2008, 03:32 PM
In transport HVACR, we use what our US colleagues call " kazoo traps " - those are the pinched hose end -fittings we install on bottom of evap drain hoses, outside the reefer box or bus as case may be.
Of course we are using a soft, pliable drain hose.

hope it's of some help to you.
T-P

frank
19-09-2008, 08:53 PM
I think daddy cool is referring to this http://www.plumbworld.co.uk/hepv0-self-sealing-waste-305-1788

Brian_UK
19-09-2008, 08:57 PM
Come across those Frank on an Ambirad heater system.

The fan suction was such that those device were being sucked inside out and sounded most painful.