DIY Chatroom Home Improvement Forum

DIY Chatroom Home Improvement Forum (
-   HVAC (
-   -   slope for furnace intake pipe? (

ridgeway 12-23-2011 12:48 AM

slope for furnace intake pipe?
I am finishing a basement and the intake/exhaust pipes for my furnace hang down more than I want. The pipes are sloped and I'm guessing its to direct the condensation back toward the furnace to a drain pipe that is attached to the intake pipe. I would like to raise the pipe a bit to get them above a drop ceiling. My question is, how much slope do I really need? The span is about 15' and the pipe is hanging down roughly 4-5" from the joist at one end and tapers to touching the joist where it exits the wall.

beenthere 12-23-2011 04:27 AM

1/4" per foot. So 15/4=3.75 inches of slope, min.

ben's plumbing 12-23-2011 06:40 AM

if you raise the pipe, make sure you raise the whole pipe not just one may have to make a new exit hole.then apply what beenthere said at a min about 3.75 inches of fall toward furnace...

All times are GMT -5. The time now is 09:19 PM.

User Alert System provided by Advanced User Tagging (Pro) - vBulletin Mods & Addons Copyright © 2016 DragonByte Technologies Ltd.

Search Engine Friendly URLs by vBSEO 3.6.1