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12-07-2021, 03:56 PM
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#1
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Mini-Skoolie
Join Date: May 2021
Location: Pompano Beach, FL
Posts: 38
Year: 2000
Engine: Cummins 5.9
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water pressure feedback
Okay, this is one of those dumb questions. I see that you have the reservoirs (tanks) for the water, but when you open a faucet, or turn the shower on, what activates the pump to pump water from the reservoir/tank to the faucet or shower? I'm guessing the type of pump you get is activated by reduced water pressure, but I don't know because I haven't bought one yet (and don't yet know the best one to buy!).
Also, is there a down side (besides weight) of having a 100 gallon tank for clean water? I'm guessing you'd like to position it near the middle of the bus, if you can.
Thanks!
Jim
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12-07-2021, 04:12 PM
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#2
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Bus Crazy
Join Date: Apr 2020
Location: Northern California (Sacramento)
Posts: 1,435
Year: 1999
Coachwork: El Dorado Fiberglass
Chassis: Ford E450
Engine: V10 Gas
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Quote:
Originally Posted by jch511
Okay, this is one of those dumb questions. I see that you have the reservoirs (tanks) for the water, but when you open a faucet, or turn the shower on, what activates the pump to pump water from the reservoir/tank to the faucet or shower? I'm guessing the type of pump you get is activated by reduced water pressure, but I don't know because I haven't bought one yet (and don't yet know the best one to buy!).
Also, is there a down side (besides weight) of having a 100 gallon tank for clean water? I'm guessing you'd like to position it near the middle of the bus, if you can.
Thanks!
Jim
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Not a dumb question and you are right. Most of us use a Shurflo or equivalent pump that senses the water pressure in the lines, and only runs when the water pressure drops below about 40 psi.
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12-07-2021, 06:49 PM
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#3
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Mini-Skoolie
Join Date: May 2021
Location: Pompano Beach, FL
Posts: 38
Year: 2000
Engine: Cummins 5.9
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Quote:
Originally Posted by Rucker
Not a dumb question and you are right. Most of us use a Shurflo or equivalent pump that senses the water pressure in the lines, and only runs when the water pressure drops below about 40 psi.
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Oh, man, thank you SO much! I can finally sleep tonight! .
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12-08-2021, 09:41 AM
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#4
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Bus Crazy
Join Date: Apr 2020
Location: Northern California (Sacramento)
Posts: 1,435
Year: 1999
Coachwork: El Dorado Fiberglass
Chassis: Ford E450
Engine: V10 Gas
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I think you'll need as much graywater storage as your freshwater storage, so it's best to think through how you will use the rig, and design the storage around that.
At a minimum I see a lot of folks with five or six gallon jugs, seems pretty skimpy but dirt cheap to set up.
My rig is designed for four days boondocking, so I have 40/40 fresh and gray.
And I don't want to start a whole debate on whether or not graywater dumping is legal. Just sayin' if you have ever been to a campsite (or road pullout, or parking lot) where someone has 'oops I accidentally kind of on purpose emptied my graywater tank' you know why it matters to design the rig so you're not one of those people.
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12-08-2021, 05:32 PM
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#5
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Mini-Skoolie
Join Date: May 2021
Location: Pompano Beach, FL
Posts: 38
Year: 2000
Engine: Cummins 5.9
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THANKS! That is extremely helpful! And I'm a retired biologist, so I promise I won't be dropping stinky water anywhere I'm not supposed to!
I am remiss. I should catch up and post images of my project as I move along.
Thanks!
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12-08-2021, 07:38 PM
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#6
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Bus Geek
Join Date: Apr 2012
Location: So Cal
Posts: 3,231
Year: 1935
Coachwork: Superior
Chassis: Chevy
Engine: 317 ci/tid / Isuzu
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Ha! You're also remiss in not having filled out your profile. Who are you? What bus do you have? Whereabouts do you live? What does your bus look like etc?
Inquiring minds are desperate to know. Without this info it's hard to help you--not to mention sell you stuff and berate your progress (just kidding).
Jack
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12-09-2021, 07:10 AM
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#7
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Bus Geek
Join Date: May 2009
Location: Columbus Ohio
Posts: 18,845
Year: 1991
Coachwork: Carpenter
Chassis: International 3800
Engine: DTA360 / MT643
Rated Cap: 7 Row Handicap
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Quote:
Originally Posted by ol trunt
Ha! You're also remiss in not having filled out your profile. Who are you? What bus do you have? Whereabouts do you live? What does your bus look like etc?
Inquiring minds are desperate to know. Without this info it's hard to help you--not to mention sell you stuff and berate your progress (just kidding).
Jack
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Brownie points if he has a Superior
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12-09-2021, 01:27 PM
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#8
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Bus Geek
Join Date: Dec 2017
Location: Dawsonville, Ga.
Posts: 10,482
Year: 1999
Coachwork: Genesis
Chassis: International
Engine: DT466/3060
Rated Cap: 77
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100 gallons of water weighs 800lb, or the equivalent of 6 students. Doesn't matter where you put it. If you're anal about it, think of what weight you could add to offset it, but it's really not an issue.
Go to the UserCP in the upper left to fill out your profile.
__________________
I Thank God That He Gifted Me with Common Sense
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12-09-2021, 04:14 PM
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#9
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Bus Crazy
Join Date: Jun 2016
Location: Orange County, CA
Posts: 1,363
Year: 1990
Coachwork: Crown, integral. (With 2kW of tiltable solar)
Chassis: Crown Supercoach II (rear engine)
Engine: Detroit 6V92TAC, DDEC 2, Jake brake, Allison HT740
Rated Cap: 37,400 lbs GVWR
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Or instead of one large water tank, use two smaller inter-connected tanks side-by-side. They will be easier to fit, and the bus will always be balanced side-to-side. To have enough water for several week's boondocking I have two 110-gallon tanks, and they don't change the bus's handling or steering at all.
To prevent water pumps from running excessively or hunting, water pressure accumulators will lessen the pressure changes while you use small amounts of water. I use a Watts 2-gallon accumulator that I keep at the same 45 PSI as my pumps' output pressure, and I can flush the loo without always making the pump run.
John
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01-20-2022, 10:35 AM
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#10
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Mini-Skoolie
Join Date: May 2021
Location: Pompano Beach, FL
Posts: 38
Year: 2000
Engine: Cummins 5.9
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Quote:
Originally Posted by cadillackid
Brownie points if he has a Superior
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Hah! So I did register and uploaded some pictures of my bus, "The Jazz Buzz" last month, I think. Thank you for pointing that out!
Cheers,
Jim
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01-20-2022, 10:39 AM
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#11
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Mini-Skoolie
Join Date: May 2021
Location: Pompano Beach, FL
Posts: 38
Year: 2000
Engine: Cummins 5.9
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Quote:
Originally Posted by Iceni John
Or instead of one large water tank, use two smaller inter-connected tanks side-by-side. They will be easier to fit, and the bus will always be balanced side-to-side. To have enough water for several week's boondocking I have two 110-gallon tanks, and they don't change the bus's handling or steering at all.
To prevent water pumps from running excessively or hunting, water pressure accumulators will lessen the pressure changes while you use small amounts of water. I use a Watts 2-gallon accumulator that I keep at the same 45 PSI as my pumps' output pressure, and I can flush the loo without always making the pump run.
John
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Thanks for that tip on the water pressure accumulator. I had no idea about those and still don't know how they work or what I have to do to make use of it. Do you happen to have a resource for reading up on that, per chance? Thanks! Jim
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01-20-2022, 10:43 AM
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#12
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Mini-Skoolie
Join Date: May 2021
Location: Pompano Beach, FL
Posts: 38
Year: 2000
Engine: Cummins 5.9
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Quote:
Originally Posted by jch511
Thanks for that tip on the water pressure accumulator. I had no idea about those and still don't know how they work or what I have to do to make use of it. Do you happen to have a resource for reading up on that, per chance? Thanks! Jim
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Sorry about that--I found an answer rather quickly on a Web search. Duh.
Cheers,
Jim
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01-27-2022, 06:48 PM
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#13
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Bus Crazy
Join Date: Apr 2019
Location: SW USA
Posts: 2,064
Year: 2003
Coachwork: IC / Amtran
Chassis: CE300
Engine: International T444e
Rated Cap: 23
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Quote:
Originally Posted by o1marc
100 gallons of water weighs 800lb, or the equivalent of 6 students. Doesn't matter where you put it. If you're anal about it, think of what weight you could add to offset it, but it's really not an issue.
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Can the suspension handle it? Sure. But that doesn't mean 800lbs of weight placed wherever couldn't have a detrimental impact on control / traction. As for offsetting, that's potentially problematic, since the amount of water you have onboard at any given time is not a static quantity.
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