Go Back   iRV2 Forums > MOTORHOME FORUMS > MH-General Discussions & Problems
Join iRV2 Today

Mission Statement: Supporting thoughtful exchange of knowledge, values and experience among RV enthusiasts.
  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 08-26-2014, 08:42 AM   #1
Senior Member
WDW's Avatar
Join Date: Jul 2014
Posts: 463

I was wondering / when hooked up to "city water" does the draw of water come directly from that source or is it drawn from your water tank first? What prevents this from filling your water tank? Why have a gravity fill?

I appreciate your help in understanding water systems.

Taking in the sights with our Trolley ...but life is always better under a Palm Tree
2016 Coachmen Mirada 35 BH. - our Trolley
2016 Jeep Cherokee Latitude, Western New York
WDW is online now   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 08-26-2014, 09:07 AM   #2
Senior Member
pops2's Avatar
National RV Owners Club
Join Date: Apr 2012
Location: Chilliwack, B.C. Canada
Posts: 407
1/ city water is charged to the city water system in your unit.
2/ you can fill the fresh water holding tand from the city water system.
3/ NO the city water does not fill the holding tank first then draw the water back into the unit.

hope this what you were looking for?


Lyle 'N' Sherry and our2 girls Kiesha 'N' Muffin 1999 National RV Tradewind 7370 'n' a 2005 Kia Sedona on an Automatic car dolly
pops2 is offline   Reply With Quote
Old 08-26-2014, 09:21 AM   #3
Senior Member
TonyDi's Avatar

Join Date: Feb 2011
Location: Point Pleasant Beach, NJ
Posts: 6,238
You should have a selector valve for filling your holding tank. If this is in the non tank fill position then you are running directly on the city water and not through your tank.
Tony & Ruth........... FMCA#F416727
Newmar Dutch Star 4320, Spartan MM Chassis, Cat C9, Jeep Grand Cherokee,with Hemi, hooked up with a Blue Ox Aventa LX, and Brake Buddy.
TonyDi is offline   Reply With Quote
Old 08-26-2014, 09:37 AM   #4
Senior Member
CampingCajun's Avatar
Join Date: Jul 2014
Location: Lafayette, La.
Posts: 1,094

You should have a valve to divert the water flow from your potable water hose to either go to your water tank (you will need to use your onboard water pump) or directly to your plumbing system (pressure supplied by the city or local water well).
2011 40' Monaco Cayman PBQ ISC 360
2013 Jeep Wrangler Unlimited
CampingCajun is offline   Reply With Quote
Old 08-26-2014, 09:39 AM   #5
Senior Member
Luckiest Dreamer's Avatar
Winnebago Owners Club
Join Date: Jun 2010
Location: Iowa
Posts: 1,178
It is possible to use both city water and tank water by simply turning on the 12V pump while you are using the city water. Some campers/MH fill the tank and use city water by connecting the hose and turning a valve to fill or to house if you are filling the tank in this fashion you would need to have the pump running to get water inside. Once you turn the valve to house you will be taking water only from the city water supply and the tank will not fill. On others there is a cup/gravity fill that you lay the end of the hose into to fill the tank. The hose would need to be removed and attached elsewhere to use the city water. and using the tank water requires turning on the 12V pump.
Larry B, Luckiest Dreamer
Luckiest Dreamer is offline   Reply With Quote
Old 08-26-2014, 12:15 PM   #6
Senior Member
Damon Owners Club
Workhorse Chassis Owner
Join Date: Mar 2009
Posts: 21,174
Normal plumbing diagram
Tank--Pump--T--Faucets and such

City water inlet has a check valve... Output side of check valve is connected to the "T" above.

There may or may not be a valve that lets you "Quick Fill" the storage tank..
Home is where I park it!
wa8yxm is offline   Reply With Quote
Old 08-26-2014, 12:27 PM   #7
Senior Member
WDW's Avatar
Join Date: Jul 2014
Posts: 463
Thank you! So much to learn on simple things!
Taking in the sights with our Trolley ...but life is always better under a Palm Tree
2016 Coachmen Mirada 35 BH. - our Trolley
2016 Jeep Cherokee Latitude, Western New York
WDW is online now   Reply With Quote
Old 08-26-2014, 04:29 PM   #8
Senior Member
Join Date: Jul 2013
Posts: 170
On my friend's 2001 MH, he has to turn the bypass valve under the sink when he uses city. On my MH 1996 I don't.

Don and Barb 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
No water from Atwood hot water heater bsamole Winnebago Industries Owner's Forum 5 08-24-2014 09:11 PM
Water leak on control valve. See pic Beeper Class A Motorhome Discussions 90 08-19-2014 08:13 PM
Water holding tank cracked connections OneSiren Class A Motorhome Discussions 15 07-28-2014 07:19 PM
water pump and water supply rogelling Entegra Owner's Forum 11 04-22-2014 08:08 PM
Water pressure ghosts? Chef Guy Monaco Owner's Forum 8 04-10-2014 02:13 AM

» 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 06:30 PM.

Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2016, vBulletin Solutions, Inc.