Reply
 
Thread Tools Display Modes
 
Old 05-09-2020, 08:56 AM   #1
Bus Nut
 
Join Date: Dec 2017
Location: GA
Posts: 486
Year: 1998
Coachwork: Amtran RE
Chassis: International 3000
Engine: T444e 7.3L
Fresh Water Tank Venting

This is probably a silly question, but I have spent a lot of hours reading and haven't found a satisfactory answer yet.

I have two 30-gallon fresh water tanks, not plumbed yet. They are sitting over the engine compartment, one on each side of the bus, just under the bed in the back.

I want to install a city water inlet on the side of the bus. It will be about the height of the bottom of the fresh water tanks.

Tank vents are usually integrated into the gravity fill cap. However, the tanks are too high to put a gravity fill on the outside of the bus... I want a gravity fill option, and it would make more sense to do it inside.

So, here are my questions:
1. If I put the gravity fill (with vent) inside the bus, do I need to worry about water sloshing out while driving? Or if I overfill with city water?

2. If I use a vent not integrated with the gravity fill, what should I use? Should I try to vent to the roof, wall, or floor? Do I need to worry about bugs, bacteria, or particulates getting through my vent line?
Biscuitsjam is offline   Reply With Quote
Old 05-09-2020, 10:02 AM   #2
Bus Crazy
 
Join Date: Sep 2018
Posts: 1,319
Year: 2007
Coachwork: Thomas Built
Chassis: Minotour
Engine: Chevy Express 3500 6.6l
I found myself not able to do a gravity feed. At first I was bummed, but then I thought, what, you gonna fill with buckets? So I looked for a diverter valve so I could plumb house and tank water to the same connection. After not finding one, I used two municipal water connectors and a couple ball valves to make it work. The overflow is the vent. It’ is PEX aNd exits through the floor
Danjo is offline   Reply With Quote
Old 05-09-2020, 10:05 AM   #3
Bus Crazy
 
Join Date: Sep 2018
Posts: 1,319
Year: 2007
Coachwork: Thomas Built
Chassis: Minotour
Engine: Chevy Express 3500 6.6l
Get a faucet screen and jam it into the end of the pipe to keep bugs out
Danjo is offline   Reply With Quote
Old 05-09-2020, 10:17 AM   #4
Bus Nut
 
Join Date: Apr 2018
Location: NorCal
Posts: 342
Year: 1995
Coachwork: Girardin
Chassis: E-350
Engine: 7.3L Powerstroke
The vent at the fill port also has a dual purpose of letting you know when the tank is full (when water starts coming out, you know it's full). You could also just fill until water starts coming out of the fill port... but that would get messy real fast, especially inside. How will you know the tanks are full? (shameless self promotion plug: you can use a liquid level sensor, arduino, and an LED bulb (https://www.skoolie.net/forums/f27/t...tml#post383445)





If I were in your shoes, I'd figure out a way to put the fill port/vent combo on the outside, even if it meant getting a step ladder (or installing rungs on the outside). I'd really dislike bringing a fresh water hose inside the bus because I'm too messy.


If I absolutely had to put the fill port inside, I'd install it in such a way that it faces downward, not sideways, and the water would go straight down into the tank. Maybe underneath the cushions? I'd install the vent elsewhere on the tank, and have that vent simply go out the wall. This would have the benefit of letting you know the tanks are full (you could hear the water gushing out the vent and hitting the ground before it rises up to the fill port and spills inside).


You don't have to worry about bugs and insects crawling their way in, so long as you have a fine mesh screen over the vent opening. I'm new to skoolies, but not new with sailboats, and in the 9 years I owned my 35 footer (including living on it full time), I never once noticed an issue with bugs or algea or anything making their way into the tank. If it's just fresh water, it's fine.
TheArgobus is offline   Reply With Quote
Old 05-09-2020, 11:12 AM   #5
Mini-Skoolie
 
Join Date: Jan 2019
Location: New Mexico
Posts: 23
Year: 1984
Coachwork: TMC
Chassis: MC-9
Engine: Detroit 6v92 TA
Rated Cap: More than I need
I would second if at all possible have your fill port out side. Dragging a hose inside will open a hole host of issues. If only option it could be manageable but a pain.
Stngllhm is offline   Reply With Quote
Old 05-09-2020, 11:17 AM   #6
Bus Nut
 
Join Date: Dec 2017
Location: GA
Posts: 486
Year: 1998
Coachwork: Amtran RE
Chassis: International 3000
Engine: T444e 7.3L
My thoughts right now...

1. I install a city water inlet (no vent) on the outside of the bus with a check valve on the line.

2. I put a 3-way valve on the city water so that it can either fill the tanks or can bypass the tanks and pump.

3. I install a ventless gravity fill inlet near the tanks in the bedroom inside the bus.

4. I install a vent from the top of the water tanks that runs to the side or rear of the bus, with a screen over the end of it.
Biscuitsjam is offline   Reply With Quote
Old 05-09-2020, 12:20 PM   #7
Bus Crazy
 
Join Date: Sep 2018
Posts: 1,319
Year: 2007
Coachwork: Thomas Built
Chassis: Minotour
Engine: Chevy Express 3500 6.6l
Why do you feel like you need gravity fill?
Danjo is offline   Reply With Quote
Old 05-09-2020, 11:41 PM   #8
Bus Nut
 
Join Date: Dec 2017
Location: GA
Posts: 486
Year: 1998
Coachwork: Amtran RE
Chassis: International 3000
Engine: T444e 7.3L
I'm not too concerned with whether or not I have a gravity fill - I'm more concerned with where to put the vent for the fresh water tank. The vent is typically integrated into the gravity fill inlet on the outer wall of the bus, but I don't feel that it makes sense to put a gravity fill outside since I would have to make it too high to reasonably use.
Biscuitsjam is offline   Reply With Quote
Old 05-09-2020, 11:51 PM   #9
Bus Nut
 
Join Date: Apr 2018
Location: NorCal
Posts: 342
Year: 1995
Coachwork: Girardin
Chassis: E-350
Engine: 7.3L Powerstroke
If it’s just a vent, run a 1/4” line to anywhere outside the bus—wherever is most convenient—so long as it’s at least a few feet above the top of the tank. The simplest solution would be to just run the line straight out of the wall, wrap the end in mesh, and secure it facing downward/backward so rain water doesn’t get in.
TheArgobus is offline   Reply With Quote
Old 05-10-2020, 12:12 AM   #10
Skoolie
 
Join Date: Jan 2020
Location: Fraser Valley British Columbia
Posts: 216
Year: 2007
Coachwork: Thomas
Chassis: Freightliner
Engine: C7 Cat
Quote:
Originally Posted by Biscuitsjam View Post
This is probably a silly question, but I have spent a lot of hours reading and haven't found a satisfactory answer yet.

I have two 30-gallon fresh water tanks, not plumbed yet. They are sitting over the engine compartment, one on each side of the bus, just under the bed in the back.

I want to install a city water inlet on the side of the bus. It will be about the height of the bottom of the fresh water tanks.

Tank vents are usually integrated into the gravity fill cap. However, the tanks are too high to put a gravity fill on the outside of the bus... I want a gravity fill option, and it would make more sense to do it inside.

So, here are my questions:
1. If I put the gravity fill (with vent) inside the bus, do I need to worry about water sloshing out while driving? Or if I overfill with city water?

2. If I use a vent not integrated with the gravity fill, what should I use? Should I try to vent to the roof, wall, or floor? Do I need to worry about bugs, bacteria, or particulates getting through my vent line?
Yes you could have a chance of some spillage inside with the vent there with the filler. The filler cap well secured should prevent any splashing from the filler hose. On my boat all the integrated vents on the fillers were sealed at the factory and independant vents were added. Maybe look at some nice marine thru hull vents and just go out the sidewall. They have very fine bug screens in them as well. Be aware that they can become clogged with spider nesting, I have had that happen but was able to clear them out with compressed air.
Oscar1 is offline   Reply With Quote
Old 05-10-2020, 12:16 AM   #11
Bus Crazy
 
Join Date: Sep 2018
Posts: 1,319
Year: 2007
Coachwork: Thomas Built
Chassis: Minotour
Engine: Chevy Express 3500 6.6l
My vent is a 1/2” FPT port on the top of the tank, plumbed with 1/2” PEX routed through a hole In the floor.
Danjo is offline   Reply With Quote
Old 05-10-2020, 12:18 AM   #12
Skoolie
 
Join Date: Jan 2020
Location: Fraser Valley British Columbia
Posts: 216
Year: 2007
Coachwork: Thomas
Chassis: Freightliner
Engine: C7 Cat
Quote:
Originally Posted by Oscar1 View Post
Yes you could have a chance of some spillage inside with the vent there with the filler. The filler cap well secured should prevent any splashing from the filler hose. On my boat all the integrated vents on the fillers were sealed at the factory and independant vents were added. Maybe look at some nice marine thru hull vents and just go out the sidewall. They have very fine bug screens in them as well. Be aware that they can become clogged with spider nesting, I have had that happen but was able to clear them out with compressed air.
A few styles to look at

image.jpg
Oscar1 is offline   Reply With Quote
Old 05-17-2020, 10:13 PM   #13
Bus Nut
 
Join Date: Dec 2018
Location: Mt Vernon, WA
Posts: 310
Year: 1996
Coachwork: Bluebird, Collins
Chassis: G30 Bluebird Microbird, E350 Shuttle Bus
Engine: 1995 Chevrolet 350, 1992 Ford 460
I was thinking of running my freshwater tank overflow/vent into my graywater bucket ( there’s no space for a graywater tank in a Microbird). But I could drill a 3/8” hole and run it out the side wall of the bus?
Who uses a pressure regulator when hooking up to a water supply? I’m so used to setting up for boondocking I almost forgot to think about what would happen if I hook up to a faucet. I dont want to pressurize my water tank with much pressure. It doesn’t look very strong. My overflow would need a plug if I hook up to a pressurized water line.
Doktari is offline   Reply With Quote
Old 05-17-2020, 10:34 PM   #14
Bus Geek
 
ol trunt's Avatar
 
Join Date: Apr 2012
Location: So Cal
Posts: 2,662
Year: 1935
Coachwork: Superior
Chassis: Chevy
Engine: 317 ci/tid / Isuzu
Valve city water past the water tank and do use a pressure limiter. Gravity fill your water tank with a vent/overflow going outside. Put a screen in the vent to keep critters out.
Jack
ol trunt is offline   Reply With Quote
Old 05-18-2020, 07:48 AM   #15
Skoolie
 
Join Date: Jan 2020
Location: Wild Wild West
Posts: 243
Year: 1999
Coachwork: Blue Bird
Chassis: TC RE
Engine: 8.3 Cummins MD3060
Rated Cap: 84
One of these may work for you as an outside vent cover. I plan on using one for my grey/black vent cover up high on the wall. I don't want to drill a hole in my perfectly non leaking roof!

https://www.amazon.com/dp/B006R5LND0...v_ov_lig_dp_it

https://www.amazon.com/dp/B073ZCHCCS...v_ov_lig_dp_it
JackE is offline   Reply With Quote
Reply

Thread Tools
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


» Featured Campgrounds

Reviews provided by

Powered by vBadvanced CMPS v3.2.3

All times are GMT -5. The time now is 06:02 PM.


Powered by vBulletin® Version 3.8.8 Beta 4
Copyright ©2000 - 2020, vBulletin Solutions, Inc.
×