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 03-24-2009, 10:10 AM   #1
Member
 
Join Date: Jan 2008
Posts: 165
Rewards Points: 0
Share |
Default

Tankless water heater proper pipe size?


Hi all,

My tankless water heater has 1/2" gas and water lines going into it. A plumber tells me that this type of heaters should have 3/4" lines for water and gas. Is this true?. Will it make a big difference for the water heater to go from 1/2" to 3/4" specially with the gas line?

gante is offline   Reply With Quote
Old 03-24-2009, 02:36 PM   #2
HVAC / Plumbing
 
Join Date: Feb 2009
Posts: 1,801
Rewards Points: 0
Default

Tankless water heater proper pipe size?


Quote:
Originally Posted by gante View Post
Hi all,

My tankless water heater has 1/2" gas and water lines going into it. A plumber tells me that this type of heaters should have 3/4" lines for water and gas. Is this true?. Will it make a big difference for the water heater to go from 1/2" to 3/4" specially with the gas line?


That plumber has seen the job. I haven't . He is probably correct

kenmac is offline   Reply With Quote
Old 03-24-2009, 02:58 PM   #3
Member
 
joed's Avatar
 
Join Date: Mar 2005
Location: Welland, Ontario
Posts: 7,574
Rewards Points: 76
Default

Tankless water heater proper pipe size?


What size of fittings are on the heater. If it has 3/4" fitting that have been reduced down to 1/2 then he is probably correct. Or this could be a smaller unit than he is used to seeing that only needs the 1/2 inch.
joed is offline   Reply With Quote
Old 04-06-2009, 08:59 AM   #4
Member
 
Join Date: Apr 2007
Location: 'burbs of Detroit, MI
Posts: 465
Rewards Points: 0
Default

Tankless water heater proper pipe size?


Read the installation manual... it will have the specific requirements. Depends on brand, size, gallons/minute, etc..
moneymgmt is offline   Reply With Quote
Old 04-06-2009, 01:52 PM   #5
Registered User
 
Termite's Avatar
 
Join Date: Apr 2008
Posts: 6,520
Rewards Points: 0
Default

Tankless water heater proper pipe size?


The pipe size is based on the gas demand. MOST tankless units' demand is high enough to warrant 3/4" gaslines. There is no one-size-fits-all answer...It totally depends on the demand as well as the length of the pipe.
Termite is offline   Reply With Quote
Old 04-06-2009, 02:28 PM   #6
Member
 
Join Date: Nov 2007
Posts: 561
Rewards Points: 0
Default

Tankless water heater proper pipe size?


Quote:
Originally Posted by gante View Post
Hi all,

My tankless water heater has 1/2" gas and water lines going into it. A plumber tells me that this type of heaters should have 3/4" lines for water and gas. Is this true?. Will it make a big difference for the water heater to go from 1/2" to 3/4" specially with the gas line?
Is it working now?

LawnGuyLandSparky 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
Change in pipe diameter at water heater blacksheiladog Plumbing 2 03-06-2009 12:12 PM
low hot water pressure angus242 Plumbing 10 01-08-2009 11:41 AM
Tankless water heater - NEED HELP! LakersFreak Plumbing 39 11-16-2008 08:49 AM




Top of Page | View New Posts

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