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Old 02-07-2009, 01:31 PM   #11
Mini-Skoolie
 
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Re: Hot tub on the roof?

That is exactly the idea. FYI this is my roommate's scheme and I'm trying to push it along. I want to do something more conventional with perhaps room for the Harley in the back. Originally the idea was to get a bus for a few of us to go to atv trails, but as no one can agree on certain parts of the process and someone has to front the cash, it makes more sense for each of us to buy a bus and help the other as we go along. Thanks for the encouragement and ideas. I will continue to tell him that a bus without a hot tub is pointless.
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Old 02-07-2009, 01:54 PM   #12
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Re: Hot tub on the roof?

Quote:
I wouldn't but as worried about smacking passengers heads so much as just smacking the whole shebang.
Sorry, the visual of my tongue planted firmly in my cheek while I was posting was missing from the smacking forehead comment.
I was picturing Jackie Chan, James Bond, Clint Eastwood, or John Wayne ducking just in time, while the bad guy/girl doesn't.
Or Monty Python or Laugh-In deliberately failing to duck.

I figured the picture formed in the reader's mind would be better than any I could paint with words.

All joking aside, we've got some pretty low bridges around the east, especially if commercial vehicles stray onto the parkways around the Big Apple, where some clearances are as low as 8 feet. You won't even get a standard skoolie through, never mind one with a roof lift or roof deck.
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Old 02-07-2009, 11:06 PM   #13
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Re: Hot tub on the roof?

Quote:
Originally Posted by crazyidea
I will continue to tell him that a bus without a hot tub is pointless.

I agree, a bus without a jacuzzi IS pointless.

a bus with a jacuzzi is quite pointless. a jacuzzi in a bus is a magnet for bikini's! Why not just mount the jacuzzi on the floor inside the bus? It's simple and works really well. I've built four jacuzzi buses over the past several years. Tell your friends that a jacuzzi bus is a wonderful idea, unless they have objections to having countless scantily clad women inside the bus that is.

the original jacuzzi bus:





Jacuzzi bus II:

http://www.skoolie.net/gallery2/d/17209-2/IMG_6280.JPG

here's a youtube vid
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Old 02-09-2009, 04:31 PM   #14
Mini-Skoolie
 
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Year: 1990
Chassis: International
Engine: DT360
Re: Hot tub on the roof?

To throw out some numbers, an empty hot tub typically weighs between 400 - 1000 lbs. The older ones that you'd be more likely to find on craigslist are going to be on the higher end of that while newer ones will be on the lower end. Even 400 lbs on the roof is a fair amount of weight and you'll likely notice it affecting handling, but that's not a deal breaker. A full hot tub typically weighs in at over 2 tons. Smaller models can drop down into the mid 2000s. Here is an interesting site to browse as they show their hot tubs along with the size, capacity, empty and full weight: http://www.spamanufacturers.com/spa-master-sm.php

I think that filling it once stationary is a good idea, but we should look at time to fill. a 500 GPH pump will take a full hour to fill a typical full sized hot tub. An ultra fast 2000 gph pump will do it in 15 minutes. The water has to lift a fair amount, so any pump will be working pretty hard to do the job. It will probably only get about half it's max rated flow, so that 2000 gph pump I would guess will only get about 1000 gph. Make sure you keep your tubes up as small and as efficient as possible. Have them be the same size as the pump opening. Any smaller and you'll constrain flow, any bigger and you'll add weight to the mass of water you are pushing up. Also avoid sharp angles. Drain is another consideration. My hot tub(not in bus) takes a few hours to gravity drain. Also, the drain hole is on the side, so it leaves a few inches of water at the bottom of the tub. You probably want to look for a model with the drain hole on the floor so it will fully drain and look for a model with a high speed drain. Alternatively, and maybe even a better idea, would be to install your own drain. You could mount 2" or even 4" pvc to the bottom of the tub and drain it in a couple of minutes. Parts to connect PVC to a flat wall should be pretty available at Home Depot or the like.

You'll also need to pay attention to heat storage. A hot tub is insulated, but water tanks usually are not, so you'll want to insulate them in order to keep your water warm.

That said, it sounds like an interesting project. I hope you keep us posted on your progress if you proceed.

Leeper: where are your hot tubs located in your buses? I was wondering if it would be feasible to place one at the very back of the bus and having it be open (moving the rear wall in front of the tub), or would this create too much strain on the frame or make the bus too tail heavy and affect handling too much?
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Old 02-10-2009, 07:32 PM   #15
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Re: Hot tub on the roof?

for $200 you can buy a sump pump from home depot that's rated for 5,150 Gallons Per Hour. That's 85 gallons per minute. Going uphill and through various fittings it'll pump less water, but should still take far less than 10 mins to fill a 400 gallon jacuzzi.
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Old 02-11-2009, 12:46 PM   #16
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Re: Hot tub on the roof?

That's a pretty good flow. What's the temperature rating?
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Old 02-16-2009, 03:28 PM   #17
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Re: Hot tub on the roof?

I'm amazed at how many people didn't read exactly what the original poster wrote! Flush with the roof does not mean on top of the roof! It isn't going to significantly increase the height, as if that mattered anyway since school busses have a few feet to go before they are too tall. An empty tub 5 or 6 feet above the floor isn't a problem, weight-wise.
The only issue I'd worry about is sealing the bus roof around the tub so it doesn't leak when spilling or raining. If I was building one (and I keep thinking seriously about it!) I'd put the tub inside for less crud-getting-in-the-water problems and for the ability to drive the bus without draining it more than halfway. I also cringe at cutting the roof open on a nice solid vehicle that wasn't going to leak!
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