Go Back   iRV2 Forums > iRV2.com COMMUNITY FORUMS > iRV2.com General Discussion
Click Here to Login
Join iRV2 Today

Mission Statement: Supporting thoughtful exchange of knowledge, values and experience among RV enthusiasts.
Reply
  This discussion is proudly sponsored by:
Please support our sponsors and let them know you heard about their products on iRV2
 
Thread Tools Search this Thread Display Modes
 
Old 12-04-2012, 09:36 AM   #1
Senior Member
 
CampDaven's Avatar


 
Join Date: Jul 2012
Location: Fulltime, USA
Posts: 14,449
Blog Entries: 1
Water pressure regulator?

Water pressure may vary greatly in different areas of water in motion, but the total pressure remains constant. So, why a "pressure regulator" on a shore hookup if the pressure is just the on shore pressure when the water is not moving?

I'm thinking that a "regulator" only restricts volume (it just goes through a smaller orifice). And if the on shore pressure is too high, decreasing volume does not protect against a rupture.

Your thoughts?
__________________

__________________
Dave and Nola, RVM1
The Journey is Our Destination!

http://davenola.blogspot.com/
CampDaven is offline   Reply With Quote
Join the #1 RV Forum Today - It's Totally Free!

iRV2.com RV Community - Are you about to start a new improvement on your RV or need some help with some maintenance? Do you need advice on what products to buy? Or maybe you can give others some advice? No matter where you fit in you'll find that iRV2 is a great community to join. Best of all it's totally FREE!

You are currently viewing our boards as a guest so you have limited access to our community. Please take the time to register and you will gain a lot of great new features including; the ability to participate in discussions, network with other RV owners, see fewer ads, upload photographs, create an RV blog, send private messages and so much, much more!

Old 12-04-2012, 09:46 AM   #2
Senior Member
 
daveshan's Avatar


 
Alpine Owners Club
Join Date: Jul 2011
Location: Durango CO
Posts: 580
While a regulator may restrict flow (cheap ones are notorious for this) that is not the way they work. Static pressure can be up to 100+psi at some parks, Red Mountain in Silverton CO is 100-110psi, a regulator keeps pressure at a setpoint such as 45psi at all times, whether water is flowing or not. Most regulators have a pressure range and a GPM rating, as long as the flow is not over the GPM rating pressure remains constant.

Run a good regulator your pipes will love you for it.
__________________

__________________
The above post is just my experience/opinion which is worth exactly what you paid for it.

'05 Lance 845/'06 F-250 or '99 Alpine 36SDS Usually towing an '01 Wrangler locked on 35"s or moderate '98 Cherokee on 33"s (rear locker only)
daveshan is offline   Reply With Quote
Old 12-04-2012, 09:46 AM   #3
Senior Member
 
BigSkyBob's Avatar


 
Monaco Owners Club
Join Date: Feb 2008
Location: Western Montana on the Divide
Posts: 1,206
I'm not the sharpest knife in the drawer, but I don't understand your statement regarding constant pressure. I'm currently in a park in Las Vegas and the unregulated water pressure is 105 PSI. I use a Watts pressure regulator that reduces the constant pressure to 55 PSI. The gauge is on the output side of the regulator and indicates a constant pressure of 55 PSI whether the water is moving or not. I could for see all sorts of issues with coach plumbing if I allowed a constant pressure of 105 PSI to enter the coach.
__________________
Bob Retired Army Traveling alone now.
2008 Camelot 40 PDQ 4 slides ISL400 towing a 2016 Dodge Ram 1500 4x4 Quadcab
Western MT in summer, AZ, NV in winter
BigSkyBob is offline   Reply With Quote
Old 12-04-2012, 09:50 AM   #4
Senior Member
 
monkey's Avatar
 
Join Date: Sep 2011
Location: Arkansas
Posts: 2,250
Cheap insurance... One of the first things we bought...
__________________
Monkey, pilot of a Great Dane hauler,
2015 Silverado 2500 Duramax/Alison 4x4 CrewCab 2016 Cougar 28SGS
1ST CAV
monkey is offline   Reply With Quote
Old 12-04-2012, 09:51 AM   #5
Senior Member
 
toneumanns's Avatar
 
Join Date: Jul 2011
Posts: 792
Pressure regulators control pressure. If your theory was correct you would notice a surge when you first turned on your faucet. My regulator is hooked up at the faucet end of the hose so if the regulator allowed high pressure in without water flow I would notice a surge when first turning on a faucet in the RV.
__________________
2011 Itasca Suncruiser, Jeep Grand Cherokee toad
MSgt retired USAF 1988, AA retired 2005
toneumanns is offline   Reply With Quote
Old 12-04-2012, 10:30 AM   #6
Senior Member
 
clyon51's Avatar
 
Monaco Owners Club
Join Date: Mar 2012
Location: Arizona West RV Park, Yuma, Az
Posts: 4,113
There are water restrictors, which many mfgs have used on MHs over the years. These are just flow restrictors and can mimic a pressure regulator when the faucet is turned on. But when turned off, if there is 100psi on the line, that will also be in the coach.

I took my restrictor off and put on a Watts pressure regulator. Now the coach only sees 50psi regardless of park pressure.
__________________
John & Clare Lyon
2007 43.5' Monaco Dynasty Palace III (All Electric)
Towd: 2011 Chevy Equinox
clyon51 is offline   Reply With Quote
Old 12-04-2012, 11:04 AM   #7
Senior Member
 
Craig_R's Avatar
 
Monaco Owners Club
Join Date: Jan 2011
Location: Huson, MT
Posts: 1,043
Here's a good tutorial on water pressure vs. water flow.
__________________
Craig & Donna
2005 Beaver Monterey Laguna IV (aka The Hotel Monterey)
2011 Jeep Liberty Limited
Craig_R is offline   Reply With Quote
Old 12-04-2012, 12:43 PM   #8
Senior Member
 
CampDaven's Avatar


 
Join Date: Jul 2012
Location: Fulltime, USA
Posts: 14,449
Blog Entries: 1
Quote:
Originally Posted by clyon51 View Post
There are water restrictors, which many mfgs have used on MHs over the years. These are just flow restrictors and can mimic a pressure regulator when the faucet is turned on. But when turned off, if there is 100psi on the line, that will also be in the coach.

I took my restrictor off and put on a Watts pressure regulator. Now the coach only sees 50psi regardless of park pressure.
Interesting!

There is a physics principle and an associated equation that make this confusing:

1. Pascal's principle: The pressure applied at one point in an enclosed fluid under equilibrium (static) conditions is transmitted equally to all parts of the fluid.

2. Bernoulli's equation: The sum of the pressure, the kinetic energy per unit volume, and the potential energy per unit volume have the same value throughout the pipe.

I wonder how a Watts regulator actually decreases pressure. It must not be a constrictor.
__________________
Dave and Nola, RVM1
The Journey is Our Destination!

http://davenola.blogspot.com/
CampDaven is offline   Reply With Quote
Old 12-04-2012, 01:01 PM   #9
Senior Member
 
Ford Super Duty Owner
Join Date: Nov 2008
Posts: 129
This is the way a Watts regulator works.
How does a water pressure regulator work
__________________
TN Bill is offline   Reply With Quote
Old 12-04-2012, 01:03 PM   #10
Senior Member
 
clyon51's Avatar
 
Monaco Owners Club
Join Date: Mar 2012
Location: Arizona West RV Park, Yuma, Az
Posts: 4,113
It uses a spring on a valve. If you want to allow more pressure in, you relieve pressure on the spring. If you want to decrease pressue you put more pressure on the spring.
__________________
John & Clare Lyon
2007 43.5' Monaco Dynasty Palace III (All Electric)
Towd: 2011 Chevy Equinox
clyon51 is offline   Reply With Quote
Old 12-04-2012, 01:12 PM   #11
Senior Member
 
CampDaven's Avatar


 
Join Date: Jul 2012
Location: Fulltime, USA
Posts: 14,449
Blog Entries: 1
Quote:
Originally Posted by TN Bill View Post
This is the way a Watts regulator works.
How does a water pressure regulator work
Hey, thanks.
Now that makes sense! Watts it is for me.

Hope everyone else realizes that a simple constrictor does NOT reduce static pressure!!!
__________________
Dave and Nola, RVM1
The Journey is Our Destination!

http://davenola.blogspot.com/
CampDaven is offline   Reply With Quote
Old 12-04-2012, 03:39 PM   #12
Senior Member
 
Workhorse Chassis Owner
Join Date: Feb 2005
Location: western wa.
Posts: 539
ok guys, which watts do you use?
seems to be alot of numbers out there.
thanks, dave
__________________
2007 NRV DOLPHIN LX 6342

WORKHORSE W-22
cannon man is offline   Reply With Quote
Old 12-04-2012, 03:51 PM   #13
Senior Member
 
palehorse89's Avatar


 
Newmar Owners Club
Join Date: Oct 2009
Posts: 7,722
This is how I did mine with a watts 3/4" regulator, mounted in wet bay. Guages for incoming and pressure to the coach. Work really well. Bought all the stuff at lowes.
Attached Thumbnails
Click image for larger version

Name:	DSC00456.jpg
Views:	99
Size:	143.5 KB
ID:	30053  
__________________
2000 Newmar MADP 4060, 350ISC, Spartan MM, IFS 2011 Jeep JK, M&G Braking, 2014 MTI 27' Hog Hauler, Wireless brake control, 2006Ultra & 1989 Springer
palehorse89 is offline   Reply With Quote
Old 12-04-2012, 04:22 PM   #14
Senior Member
 
wa8yxm's Avatar
 
Damon Owners Club
Workhorse Chassis Owner
Join Date: Mar 2009
Posts: 22,790
IF you only park in one park, Your logic is good but your plan sucks.

If you move about...Well some numbers.

The two parks I summer at run 50-55 PSI max

My House, when I had one, 80

The spot I'm typing in as high as 120 PSI

The seals on the flush valve for the some toilets are rated Sixty

your flow restrictor does NOTHING to lower the static system pressure, it does make taking a shower less pleasant.

A WATTS "whole house' regulator, at least 1/2 inch with hose adapters, if working properly, WILL control the pressure.

It won't sreriously restrict the flow though so the shower is still good.
__________________

__________________
Home is where I park it!
wa8yxm 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 12:54 AM.


Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2017, vBulletin Solutions, Inc.