Skip to main content
Topic: Fill Fresh Water Tank (Read 852 times) previous topic - next topic

Fill Fresh Water Tank

My 1989 U300 GV Operators manual does not provide a description of how to fill the fresh water tank. It vaguely refers to a "valve" but does not mention where the valve is located. I have searched everywhere inside the water service compartment. Nothing labled. There are three standard faucet-type valves there, but all appear to be drain valves with the openings protruding out of the belly plate.

Any advice or guidance will be appreciated!
1989 Foretravel U300 Grand Villa
Build #3410

Re: Fill Fresh Water Tank

Reply #1
Can you post a picture of the wet bay?
97 U295 40, Build #5040, 6C8.3 325 HP
Oregon Continuous Traveler
Samsung Residential #RF20HFENBSR,
Xantrex SW2012, (3)AGM8D Hse, (2)AGM Grp24 Eng, Victron BMV-712, 1800w Solar 4 LG & 2 Sunpower
Extreme Full Body Pt w/hdlmps, new furn/floor, 4 down Lexus 2004 GX470 AWD curb weight 4,740 lbs
Prev: 1990 Barth, 10L 300 2 yrs; 91&92 Monaco Signature, 10 yrs, 10L C 300 &  6C8.3 300; 1997 ForeT 6C8.3 325 since May 2017.  Employed by Guaranty RV 14+ yrs.  Former VW New Car Dlr/Service Dlr, Sales Mgr, Rv Sales, and Service Adviser from 1968-2017
"Don't criticize what you can't understand" Bob Dylan

Re: Fill Fresh Water Tank

Reply #2
There is a couple of members that have coaches similar to yours that will chime in for sure.  IIRC seems like that fill valve is under the floor of the bathroom vanity.  There is a access hand hole cut in the floor.  I think this is before the time that Foretravel switched the placement of that valve to the little box  in the floor between the 2 front seats.

Pamela & Mike
Pamela & Mike 97 U 320

"It's not what happens to you, but how you react to it that matters."

Re: Fill Fresh Water Tank

Reply #3
Jack, yes, will post pictures. Thanks.
1989 Foretravel U300 Grand Villa
Build #3410

Re: Fill Fresh Water Tank

Reply #4
My valve is under the sink in the bathroom.. look there.. just a ball valve
The selected media item is not currently available.
My advice and experiences are Free, you decide if they are worth anything .

John - driving Old Faithful
1994 U280 GV
C8.3, Banks, Pacbrake, 900 watts, Resonator, XLHD tow dolly
Retired Army Warrant Officer

Life is what you make of it - if it is lemons, make lemonade!
Former Coaches:
1988 GV 40' ORED 300HP CAT - 9 years
1990 Winnebago LeSharo - 3 years
2000 Newmar London Aire - 3 years (#18 of 23 produced)

Re: Fill Fresh Water Tank

Reply #5
Our U300's fill valve is also inside the door under the sink on the right side. Use a flashlight the first time to find it.

Pierce
Pierce and Gaylie Stewart
'93 U300/36 WTBI
Detroit 6V-92TA Jake
1140 watts on the roof
SBFD (ret)

Re: Fill Fresh Water Tank

Reply #6
Pierce, thanks. I'll look again. I didn't find it there upon first look, but maybe I am searching for something more obscure.
1989 Foretravel U300 Grand Villa
Build #3410

Re: Fill Fresh Water Tank

Reply #7
It's between the 2 cabinet doors... to the side of the sink bowl...
The selected media item is not currently available.
My advice and experiences are Free, you decide if they are worth anything .

John - driving Old Faithful
1994 U280 GV
C8.3, Banks, Pacbrake, 900 watts, Resonator, XLHD tow dolly
Retired Army Warrant Officer

Life is what you make of it - if it is lemons, make lemonade!
Former Coaches:
1988 GV 40' ORED 300HP CAT - 9 years
1990 Winnebago LeSharo - 3 years
2000 Newmar London Aire - 3 years (#18 of 23 produced)

Re: Fill Fresh Water Tank

Reply #8
Thanks to all who directed me under the bathroom sink. I would maybe have found the valve in the next year, but not this season. This seems to have been my final mystery to solve before having full functionality of my coach. Very much appreciate all your help!

1989 Foretravel U300 Grand Villa
Build #3410

Re: Fill Fresh Water Tank

Reply #9
Randall,
  A good upgrade to consider once you get all caught up is a direct fill for your water tank (lots of posts on different schemes). Then you can forget all about that valve.
jor
93 225
95 300
97 270
99 320

Re: Fill Fresh Water Tank

Reply #10
My valve was in-between the cabinet door under bathroom sink as well, kinda blended in with the carpet thats under sink. I have not got a chance to use it yet but since were on this topic, when you do open the valve to fill tank, is there an overflow at bottom of coach to let you know its full?



Tony n Denise 1994 U-300 SE detroit diesel 6v92 jake

Re: Fill Fresh Water Tank

Reply #11
Quote
is there an overflow at bottom of coach to let you know its full?

If yours is like the later models, the overflow is located at the top of the water tank on the passenger side. It is a hose that dumps right down the bulkhead in front of the rear duals. Many of us have rerouted that hose through the floor so it dumps the water directly onto the ground. On my 95 300 and on this 97 270 you could see the overflow hose through an access hole in the compartment just forward of the water heater. Here's a photo of the access hole.
jor
93 225
95 300
97 270
99 320

Re: Fill Fresh Water Tank

Reply #12
If yours is like the later models, the overflow is located at the top of the water tank on the passenger side. It is a hose that dumps right down the bulkhead in front of the rear duals. Many of us have rerouted that hose through the floor so it dumps the water directly onto the ground. On my 95 300 and on this 97 270 you could see the overflow hose through an access hole in the compartment just forward of the water heater. Here's a photo of the access hole.
jor
Thanks jor, ill check it out tomm.
Tony n Denise 1994 U-300 SE detroit diesel 6v92 jake

 

Re: Fill Fresh Water Tank

Reply #13
While you fill, be sure to turn off the water pump. Otherwise pump will run constant until you close the valve when the tank is full
The Starship- 1990 Grandvilla Unihome U300 40ft
6V92 Detroit Diesel w/ 4 spd Allison w/ retarder. Build# 3575 , Foretravel# 17895
The Shuttlecraft- 2015 Ford Explorer
Steve ( N6EKV ) & Lori ( N6JTD ) Faries  w/ Marlee our precious pup.
Patterson CA.