Thread Tools Search this Thread Display Modes
Old 10-21-2014, 10:29 AM   #15
Rivet Master
73shark's Avatar
2011 Interstate Coach
Overland Park , Kansas
Join Date: Aug 2011
Posts: 2,454
Originally Posted by dkottum View Post
It is built into the external city water receptacle where you hook up. I think the receptacle says it is a pressure regulator there on the outside.
Are we sure that the Interstates have the built-in regulator?

Glass half full or half empty to an engineer is simply a glass that was over designed.

PM me for sale info on my 2011. SOLD!
73shark is offline   Reply With Quote
Old 10-21-2014, 10:55 AM   #16
Rivet Master
UKDUDE's Avatar
2014 Interstate Ext. Coach
Sedona , Arizona
Join Date: Jul 2008
Posts: 846
The 2014 Interstate Parts PDF, which I downloaded from the Airstream website, does mention a "City water fill w/regulator, chrome".

Sent from my iPad using Airstream Forums

UKDUDE is offline   Reply With Quote
Old 10-21-2014, 11:01 AM   #17
Home of Vortex tuning
CDONA's Avatar
2013 27' FB Eddie Bauer
Spearfish , South Dakota
Join Date: Dec 2009
Posts: 430
Images: 9
My first time on my Alfa, I ran an external pressure reducer into external water filter into the built in PR, and lived with weak flow from the shower.
Once I realized there were two inline PR's, I pulled one and got more than the dribble. The water pump had better shower flow.
My new EB the water inlet/PR started leaking back in Jan. I pulled it from the skin, tightened it (4 screws on two piece plastic construction) and then left it loose to dry out for a couple of weeks. It started leaking again this month, so I replaced it on my dime, cheaper than a trip to Tucson for warranty.
I'm keeping the old one to seal up with silicone as backup.
"Chip Tank" is in Vacaville Ca..
CDONA is offline   Reply With Quote
Old 10-21-2014, 04:35 PM   #18
joemikeb's Avatar
2013 Interstate Coach
Fort Worth , Texas
Join Date: May 2013
Posts: 279
My 2013 came with an external pressure regulator in a plastic bag along with some other small items such as the hose and nozzle for the external shower. I use it and have no low water pressure problems.
Make errors — otherwise the Great Spirit realizes
you have finished your purpose on earth.

— Navajo saying
joemikeb is offline   Reply With Quote
Old 10-21-2014, 04:38 PM   #19
Rivet Master
PharmGeek's Avatar

2014 30' FB FC Bunk
Hoover , Alabama
Join Date: Dec 2012
Posts: 3,140
I use external as well and water pressure is un affected as far as I could tell

Never bad a problem with water pressure yet

I still am not clear why high pressure at spigot could not damage a water hose

Sent from my iPhone using Airstream Forums
“The atoms of our bodies are traceable to stars that manufactured them...We are not figuratively, but literally stardust.”

PharmGeek is offline   Reply With Quote
Old 10-21-2014, 06:18 PM   #20
Rivet Master
dkottum's Avatar
2012 25' Flying Cloud
Battle Lake , Minnesota
Join Date: Jun 2009
Posts: 6,842
Originally Posted by 73shark View Post
Are we sure that the Interstates have the built-in regulator?
This is from your (2014) Interstate Owners Manual:

"Your plumbing system has a built in pressure regulator to protect your lines and faucets from extremely high pressures on some city water systems. An after-market external regulator is not recommended, as it could lower the water pressure at the inlet and thus to your faucets and shower."
Doug and Cheryl
2012 FC RB, Michelin 16, ProPride 1400
2016 Ram 1500 Laramie Crew Cab 4X4 Ecodiesel 3.92 axles

The Truth is More Important Than the Facts
dkottum is offline   Reply With Quote
Old 12-19-2015, 07:19 AM   #21
Rivet Master
InterBlog's Avatar

2006 22' Interstate
League City , Texas
Join Date: Oct 2014
Posts: 1,291
A post-script with a note on older Interstates...

Initially, I didn't think much about this issue other than I grabbed a regulator in a camping store just in case there was a question about it ever being needed for some reason. The 2007 owner's manual has the same advisory verbatim as what was quoted above for the 2014 manual. The parts manual doesn't supply any technical details other than to suggest that said regulator is integral to the fill apparatus installed in the side of the Interstate.

This week I saw this type of sign for the first time in a campground, so I inserted the external regulator ahead of the shore line. Even if it will not reduce static pressure for the Physics 101 reason given in the comments above, it's still nice to have some information regarding the stated pressure - it is really high such that I maybe ought to keep an eye on it, or is there just the potential for it being high?

In this case it proved to be a non-issue, but I think I'll leave the regulator attached to the line so that I can compare to future pressures.
Attached Thumbnails
Click image for larger version

Views:	49
Size:	144.4 KB
ID:	254111  
InterBlog is offline   Reply With Quote
Old 12-19-2015, 08:41 AM   #22
4 Rivet Member
2011 Interstate Coach
Muskogee , Oklahoma
Join Date: Mar 2011
Posts: 375
Actually, there is.

I posted this some time ago. My 2011 leaked under high pressure at the plastic intake regulator. After removing the refrigerator, I found this:

All that is standing between you and a flood is a cheap, plastic regulator held together with four screws. That's it. In my case, the device leaked because the screws, over time, either loosened, or never had been, fully tightened. Didn't matter as the damage was done. But even without that issue, the regulator itself is simply not very robust. I wouldn't trust it.

Regardless of what Airstream suggests in the manual, using a quality (i.e., brass) regulator at the tap won't cause a problem under normal pressure. And, you won't have to rely on a very cheap and flimsy plastic regulator to keep from flooding your van. If it does cause pressue issues, you can simply remove it from the line. I'd rather be over-cautious than risk a major flood if the plastic regulator fails.

But if you come to a park that has extremely high pressure, you are rolling the dice that what happened to me will happen to you. If you want to stack the deck in your favor, use a separate regulator at the tap.

Originally Posted by dkottum View Post
Pharm, your water hoses are outside the trailer and not protected by the built-in unit. There is a good chance your hose damage occurred from expansion within the hose from heating of the sun, so a pressure regulator at the campground spigot would not have protected that either. There is really no reason to use an additional pressure regulator.
2011 Interstate WD/Lounge
gmillerok1 is offline   Reply With Quote
Old 12-19-2015, 10:06 AM   #23
Rivet Master
InterBlog's Avatar

2006 22' Interstate
League City , Texas
Join Date: Oct 2014
Posts: 1,291
I remember that photo - part of this discussion is in another thread. The next time I bring our Interstate out of storage, I'm going to look at exactly what apparatus is associated with our city water port. When we did our black/grey water vent line repair almost a year ago, I noticed the incoming water line; in fact I took a Sharpie and marked something like "City Water In" on the inside of the bulkhead under the cabinetry, so I would not forget. But I didn't note whether it actually had any regulator-like device associated with it, or whether there was plastic vs. brass or some other material.

InterBlog is offline   Reply With Quote

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

Similar Threads
Thread Thread Starter Forum Replies Last Post
Water pressure regulator? yukionna Fresh Water Systems 7 06-16-2010 10:03 PM
Help!! Need access water pressure regulator Crawdad Fresh Water Systems 5 07-15-2007 02:16 PM
Water pressure regulator...from factory? Kistler Our Community 6 07-14-2007 09:29 PM
Water Pressure Regulator & External Water Filter safarijim Off Topic Forum 7 02-01-2007 08:17 PM
Any PLUMBERS out there?? Pressure regulator, water pump questions SmokelessJoe Water Heaters, Filters & Pumps 65 01-11-2007 03:01 PM

Virginia Campgrounds

Reviews provided by

Our Communities

Our communities encompass many different hobbies and interests, but each one is built on friendly, intelligent membership.

» More about our Communities

Automotive Communities

Our Automotive communities encompass many different makes and models. From U.S. domestics to European Saloons.

» More about our Automotive Communities

Marine Communities

Our Marine websites focus on Cruising and Sailing Vessels, including forums and the largest cruising Wiki project on the web today.

» More about our Marine Communities

Copyright 2002-2015 Social Knowledge, LLC All Rights Reserved.

All times are GMT -6. The time now is 04:23 AM.

Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2016, Jelsoft Enterprises Ltd.

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