Go Back   DIY Chatroom Home Improvement Forum > Home Improvement > Plumbing

CLICK HERE AND JOIN OUR COMMUNITY TODAY...IT'S FREE!

Reply
 
Thread Tools Search this Thread Display Modes
Old 10-31-2008, 04:50 PM   #1
Member
 
Join Date: Apr 2007
Posts: 2,283
Rewards Points: 1,014
Question

dead-end nipple before a gas appliance


some guy at home depot that looked like a total random told me that you are supposed to use a dead-end nipple before your gas line makes a 90 deg turn towards an appliance, by actually using a tee rather than an elbow with the nipple going into the tee socket opposite from the direction of flow. he said that is needed in case some completely foreign particles come through the gas line to prevent them from going into the appliance by trapping them into the nipple.

is this guy really onto something or had he been smoking stuff ? it does not sound like an effective way to trap foreign particles to me, why wouldn't they follow the line into the appliance rather than going straight into the dead-end nipple ? i thought that, if this were an issue, they would rather make some sort of filters that get mounted on the line to make sure there is no weird stuff.

amakarevic is offline   Reply With Quote
Old 10-31-2008, 05:01 PM   #2
nap
You talking to me?
 
nap's Avatar
 
Join Date: Dec 2007
Location: sw mi
Posts: 5,407
Rewards Points: 2,000
Default

dead-end nipple before a gas appliance


actually, he is correct. It allows larger particles of debris (rust, sand) to fall to the bottom of the nipple rather than making the turn and flowing into the appliace.

nap is offline   Reply With Quote
Old 10-31-2008, 05:03 PM   #3
Member
 
Join Date: Apr 2007
Posts: 2,283
Rewards Points: 1,014
Question

dead-end nipple before a gas appliance


dude, why don't they make a filter box of some sort ?

how bad is it if you don't do it ? what percentage of applications have it ?
amakarevic is offline   Reply With Quote
Old 10-31-2008, 05:04 PM   #4
Member
 
Join Date: Apr 2007
Posts: 2,283
Rewards Points: 1,014
Question

dead-end nipple before a gas appliance


also, which length nipple should i use for this ?
amakarevic is offline   Reply With Quote
Old 10-31-2008, 05:56 PM   #5
the Musigician
 
DangerMouse's Avatar
 
Join Date: Jul 2008
Location: I'm right here!
Posts: 10,404
Rewards Points: 2,000
Default

dead-end nipple before a gas appliance


every gas furnace i've seen has it. there's probably code for this....

DM
__________________
[SIGPIC][/SIGPIC]Click here to see some of my original magic tricks and trick boxes!
DangerMouse is offline   Reply With Quote
Old 10-31-2008, 06:08 PM   #6
the Musigician
 
DangerMouse's Avatar
 
Join Date: Jul 2008
Location: I'm right here!
Posts: 10,404
Rewards Points: 2,000
Default

dead-end nipple before a gas appliance


for a pic of my furnace as example, see this thread. http://www.diychatroom.com/showthrea...517#post178517
post #3

DM
__________________
[SIGPIC][/SIGPIC]Click here to see some of my original magic tricks and trick boxes!
DangerMouse is offline   Reply With Quote
Old 10-31-2008, 06:18 PM   #7
Custom Cabinet Maker
 
Join Date: Jun 2007
Location: Netcong NJ
Posts: 1,097
Rewards Points: 500
Default

dead-end nipple before a gas appliance


The term is a "drip Tee" it allows debris and condensation to fall out of the gas stream and not contaminate the feed into a device
skymaster is offline   Reply With Quote
Old 10-31-2008, 07:27 PM   #8
I have gas!
 
Clutchcargo's Avatar
 
Join Date: Mar 2007
Location: Massachusetts
Posts: 1,781
Rewards Points: 1,014
Default

dead-end nipple before a gas appliance


Quote:
Originally Posted by amakarevic View Post
also, which length nipple should i use for this ?
3" drip leg is code in Massachusetts. YMMV
__________________
I tear things down and build them up.
Clutchcargo is offline   Reply With Quote
Old 10-31-2008, 08:02 PM   #9
Member
 
Join Date: Sep 2008
Location: Portland, OR
Posts: 1,186
Rewards Points: 500
Default

dead-end nipple before a gas appliance


You should have one in every line. It doesn't have to be right at the appliance.

If you decide not to put one in then get ready to clean your appliances as they slowly fill up with crud.
__________________
My idea of a perfect day: No where to go and all day to get there.
Marvin Gardens is offline   Reply With Quote
Old 11-01-2008, 11:04 AM   #10
Electrician
 
SD515's Avatar
 
Join Date: Aug 2008
Location: Near Jackson Michigan Area
Posts: 1,450
Rewards Points: 500
Default

dead-end nipple before a gas appliance


Drip-leg, drip-tee…we call them soot-traps. A 3 inch trap at the end of the run before the pipe enters the appliance is needed. Appliance gas valves have a screen in their inlets to block larger particles, and the soot-trap collects smaller particles that drop out of the gas stream.
__________________
Kyle

Just because you can, doesn't always mean you should
SD515 is offline   Reply With Quote
Old 11-01-2008, 11:10 AM   #11
the Musigician
 
DangerMouse's Avatar
 
Join Date: Jul 2008
Location: I'm right here!
Posts: 10,404
Rewards Points: 2,000
Default

dead-end nipple before a gas appliance


i think we should mention too that the end has a square-end plug to allow for easy cleaning. (when the gas is turned off, of course)
hi Kyle.

DM
__________________
[SIGPIC][/SIGPIC]Click here to see some of my original magic tricks and trick boxes!
DangerMouse is offline   Reply With Quote
Old 11-01-2008, 11:23 AM   #12
Custom Cabinet Maker
 
Join Date: Jun 2007
Location: Netcong NJ
Posts: 1,097
Rewards Points: 500
Default

dead-end nipple before a gas appliance


Gas off?? DM you take all the fun outta it!!!!!!!!!!!!
Of course OFF MUST BE Just in case somebody took me serious
skymaster is offline   Reply With Quote
Old 11-01-2008, 11:23 AM   #13
Member
 
Join Date: Sep 2008
Location: Portland, OR
Posts: 1,186
Rewards Points: 500
Default

dead-end nipple before a gas appliance


Quote:
Originally Posted by MdangermouseM View Post
i think we should mention too that the end has a square-end plug to allow for easy cleaning. (when the gas is turned off, of course)
hi Kyle.

DM
I've pulled traps out that were 50 years old and there was hardly anything at the bottom. I can see about 1000 years from now that they might need a cleaning.
__________________
My idea of a perfect day: No where to go and all day to get there.
Marvin Gardens is offline   Reply With Quote
Old 11-02-2008, 12:33 AM   #14
Member
 
Join Date: May 2007
Posts: 354
Rewards Points: 252
Default

dead-end nipple before a gas appliance


In Oregon the drip leg is code. I have opened a number of gas lines over the years, not as many at Marvin Garden. I can only think of one job where I found galvanized flakes, and that pipe was at least 25 years old. Those flakes had not made it to the drip leg. And I have never seen a screen in the appliance regulator, but then I do not do residential, just commercial.
fireguy is offline   Reply With Quote
Old 11-02-2008, 09:12 AM   #15
nap
You talking to me?
 
nap's Avatar
 
Join Date: Dec 2007
Location: sw mi
Posts: 5,407
Rewards Points: 2,000
Default

dead-end nipple before a gas appliance


Quote:
Originally Posted by fireguy View Post
In Oregon the drip leg is code. I have opened a number of gas lines over the years, not as many at Marvin Garden. I can only think of one job where I found galvanized flakes, and that pipe was at least 25 years old. Those flakes had not made it to the drip leg. And I have never seen a screen in the appliance regulator, but then I do not do residential, just commercial.

I guess that is testimony as to why you are not supposed to use galvanized pipe for gas systems.

nap is offline   Reply With Quote
Reply


Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
CSST gas line through ceiling/floor to appliance pcampbell HVAC 2 05-20-2008 06:36 PM
Dead outlet and switches on otherwise live circuit viking1974 Electrical 4 08-23-2007 05:30 PM
Dead Battery larock5 Tools 2 06-20-2007 10:00 PM
Issues with appliance plug hgiljr Electrical 1 03-17-2007 07:09 AM
Lenox G8 series blower dead...almost MSP HVAC 1 02-18-2007 12:15 AM




Top of Page | View New Posts

Copyright © 2003-2014 Escalate Media. All Rights Reserved.