Reply
 
Thread Tools Search this Thread Display Modes
 
Old 03-14-2013, 07:09 AM   #1
3 Rivet Member
 
steveirving's Avatar
 
1959 24' Tradewind
Quantico , Virginia
Join Date: Oct 2012
Posts: 126
Images: 11
Blog Entries: 6
Question Plumbing Size?

Hi,

Getting ready to pull out the old leaky/patched copper plumbing in our '59 Tradewind. I plan on installing PEX.

Any tips on what size to use? Should use 1/2" or 3/8" or a mixture of different sizes?
__________________

__________________
steveirving is offline   Reply With Quote
Old 03-14-2013, 07:29 AM   #2
Rivet Master

 
1986 31' Sovereign
Miami , Florida
Join Date: Feb 2004
Posts: 1,651
Blog Entries: 13
Granted, my trailer is newer than yours (86) but I can tell you that most of the main runs are 1/2". With the pressure regulator on mine set at 40psi, that gives me pretty good flow rates. The leads that branch off the main to the bathroom sink are 3/8" though.

I used PEX and Sharkbite fittings for the few repairs I've had to make and all has held up fine.

Mike
__________________

__________________
n2916s is offline   Reply With Quote
Old 03-14-2013, 07:30 AM   #3
Figment of My Imagination
 
Protagonist's Avatar
 
2012 Interstate Coach
From All Over , More Than Anywhere Else
Join Date: Dec 2011
Posts: 10,326
Quote:
Originally Posted by steveirving View Post
Hi,

Getting ready to pull out the old leaky/patched copper plumbing in our '59 Tradewind. I plan on installing PEX.

Any tips on what size to use? Should use 1/2" or 3/8" or a mixture of different sizes?
Simple answer, you want the nominal diameter of the PEX to be the same as the nominal diameter of the copper you're replacing. Inside diameters will be slightly different for the same nominal diameter, but that doesn't matter for this application.
__________________
WBCCI #1105
TAC LA-4

My Google-Fu is strong today.
Protagonist is offline   Reply With Quote
Old 03-14-2013, 08:41 AM   #4
Moderator
 
HiHoAgRV's Avatar

 
1991 34' Excella
1963 26' Overlander
1961 26' Overlander
Central , Mississippi
Join Date: Nov 2006
Posts: 5,326
Images: 29
Blog Entries: 49
1/2" PEX is widely available, 3/8 can be a bit more scarce - thus my choice to go with 1/2" all the way.
__________________
Hi Ho Silver RV! Vernon, Sarah, Mac the Border Collie -
A honkin' long 34' named AlumaTherapy http://www.airforums.com/forums/f205...num-54749.html
and a 26' '63 Overlander, Dolly http://www.airforums.com/forums/f109...ome-71609.html
HiHoAgRV is offline   Reply With Quote
Old 03-14-2013, 08:43 AM   #5
Rivet Master
 
TG Twinkie's Avatar
 
1974 Argosy 26
Morrill , Nebraska
Join Date: Nov 2009
Posts: 5,140
Images: 2
Blog Entries: 5
I used 1/2" throughout. That way all of the fittings are the same size. Also used the flexible braided stainless lines to connect to all fixtures, including the water heater. I posted some pics on my blog.
__________________
Knowledge: "A gift to be shared. A treasure to receive."
TG Twinkie is offline   Reply With Quote
Old 03-14-2013, 08:47 AM   #6
Rivet Master
 
utee94's Avatar
 
1963 26' Overlander
Austin , Texas
Join Date: Feb 2008
Posts: 2,636
Yup, I used 1/2" throughout because it was the most common and available size.


-Marcus
utee94 is offline   Reply With Quote
Old 03-14-2013, 09:32 AM   #7
2 Rivet Member
 
1966 20' Globetrotter
1964 24' Tradewind
johnsoncity , Tennessee
Join Date: Oct 2009
Posts: 65
Most 1/2" Pex is 3/8 inside diameter. I would stay with 1/2" myself.
__________________
donh1 is offline   Reply With Quote
Old 03-14-2013, 02:17 PM   #8
Rivet Master
 
1988 32' Excella
Robbinsville , New Jersey
Join Date: May 2012
Posts: 1,010
Like others have said 1/2", bigger is better.

The only place it is good to restrict water flow is at the point of use, such as where it comes out of the shower head, not where or before it goes into the shower head, that way you still have pressure.
__________________
Wazbro is offline   Reply With Quote
Old 03-14-2013, 02:48 PM   #9
Wise Elder
 
Jammer's Avatar
 
2010 30' Classic
Vintage Kin Owner
South of the river , Minnesota
Join Date: Dec 2009
Posts: 4,119
Quote:
Originally Posted by steveirving View Post
Hi,

Getting ready to pull out the old leaky/patched copper plumbing in our '59 Tradewind. I plan on installing PEX.

Any tips on what size to use? Should use 1/2" or 3/8" or a mixture of different sizes?
3/8" is completely sufficient, in terms of flow rate, for any runs that serve a single fixture. Smaller pipe means less water wasted running the tap until the water gets hot or cold, as the case may be. And although there isn't much difference in the weight of the pipe, using 3/8" will reduce the weight of water and fittings by a couple of pounds.

Most people, including the mother ship, just use 1/2" because then you only need one crimp head and one size of fittings and pipe.
__________________
To learn to see below the surface, you must adjust your altitude
Jammer is offline   Reply With Quote
Old 03-14-2013, 02:55 PM   #10
BAB
Rivet Master
 
BAB's Avatar

 
2015 30' Classic
2012 28' International
Greensboro , North Carolina
Join Date: Aug 2011
Posts: 1,574
...also, you can buy red for hot and blue for cold. I started using PEX about 7 years ago when I added plumbing in my house...used it throughout my pool house and for other projects. Sharkbites work....but I dropped the coin and bought a crimp tool (around $100)...it came with multiple heads so I can use it with all sizes of PEX. You can also find fittings that'll let you connect it to copper and even PB pipe. Once you use it you will never go back to anything else. GREAT for DIYers and most builders are now using it in new home construction. Side benefit: it has a bit of give if there's a freeze...unlike copper.
__________________
_________________
"SilverLeaf II" 2015 30' Classic
2014 RAM 2500 Laramie 4x4 CC w/6.7L Cummins
ProPride 3P
AIR# 58452
WBCCI # 3430-Unit 21
BAB is offline   Reply With Quote
Old 03-18-2013, 05:33 PM   #11
3 Rivet Member
 
steveirving's Avatar
 
1959 24' Tradewind
Quantico , Virginia
Join Date: Oct 2012
Posts: 126
Images: 11
Blog Entries: 6
Any thoughts on crimps vs clamp pex?
__________________
steveirving is offline   Reply With Quote
Old 03-19-2013, 09:36 AM   #12
2 Rivet Member
 
1966 20' Globetrotter
1964 24' Tradewind
johnsoncity , Tennessee
Join Date: Oct 2009
Posts: 65
Cannot tell you what to do, but will say i have replumbed three houses using the crimp method.HAVE HAD ZERO LEAKS, THIS HAS BEEN OVER A FIVE YEAR SPAN. I am not a trained plumber. I would spend the money to buy a good crimper tool. (I bought mine at Lowes big box store.
__________________
donh1 is offline   Reply With Quote
Old 03-19-2013, 09:45 AM   #13
Moderator
 
Kevin245's Avatar

 
Vintage Kin Owner
... , ...
Join Date: Jul 2007
Posts: 9,390
Images: 9
Quote:
Originally Posted by donh1 View Post
I would spend the money to buy a good crimper tool. (I bought mine at Lowes big box store.
Ditto here. I will say that crimping requires some forethought as the tool size can limit access when working in tight spaces.

Kevin
__________________

__________________

"You wouldn't worry so much about what others think of you if you realized how seldom they do."

Eleanor Roosevelt

Kevin245 is offline   Reply With Quote
Reply


Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
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



Virginia Campgrounds

Reviews provided by




Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -6. The time now is 03:00 AM.


Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2017, Jelsoft Enterprises Ltd.

Airstream is a registered trademark of Airstream Inc. All rights reserved. Airstream trademark used under license to Social Knowledge LLC.