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Ahtesham Hussain
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Join Date: Jul 2008
Posts: 2

HVAC-AHUs

08/17/2008 1:29 PM

What should be the pipe material, size and drain trap for AHU Condensate drain ?
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user-deleted-1104
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Engineering Fields - Mechanical Engineering - New Member Technical Fields - Technical Writing - New Member

Join Date: May 2007
Location: Parallel 45
Posts: 226
Good Answers: 21
#1

Re: HVAC-AHUs

08/18/2008 3:49 AM

The trap should be made from copper pipe and must be configured to keep a adequate water column that will overcome the fan oulet pressure.

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Ried
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Join Date: Dec 2005
Posts: 1602
Good Answers: 19
#2
In reply to #1

Re: HVAC-AHUs

08/18/2008 9:36 AM

I have occasionally seen PVC uses for condensate drains, but in sunny environments PVC can become brittle and subject to breakage.

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Anonymous Poster
#3

Re: HVAC-AHUs

08/18/2008 8:22 PM

We use PVC at a minium of 1 inch diameter and no reductions .
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philroth
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Join Date: Dec 2006
Location: Silverdale, Washington
Posts: 29
#4

Re: HVAC-AHUs

08/20/2008 12:48 PM

The AHU product data, unit application, local building codes, and site requirements are needed to make an application. Without these one can only say you need a trap.

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