Sloan flushometer toilet in trailer

Thanks for reading this message!

I am starting a restroom trailer business that also provides free restroom and shower facilities to the homeless, and had had an idea that I think will change the restroom trailer industry forever: sloan flushometer toilets in single station restroom trailers! A lot of them. Like 20 at least.

Here's the problem, the cost. The cheapest restroom trailer I've seen is 16k. That's without a shower.

The solution? Build my own. But not from the ground up!

I want buy super rough shells in bulk and just customize them with the help of an experienced handyman to keep costs down.

Customization include shallow well jet pump with pressure tank, Sloan flushometer toilets, a cabinet vessel sink, vanity mirror with 4 light vanity above, and regular shower head.

First question. Can I just buy a 1/2 horsepower shallow well pump with pressure tank for like $500, hook it up to the freshwater tank, and get a couple of good flushes of the flushometer toilet out of it? I know the manual says it requires 25gpm at 25psi flowing, but it only uses 1.6gpf.

Second question. Where should the wall pipe opening be on the wall for a flushometer toilet? Also, what size should that pipe diameter be? Any special requests to ask the manufacturer?

Third question. The unit has an rv style urinal. How do I make it a flushometer urinal?

Thanks!

Edit: On second thought, I think I will go over the design specifications by choosing what toilet, urinal, and sink I want and consult with a plumber. Well, I guess you guys are plumbers. So one last thing, what flush valve urinal, flush valve toilet, and vessel sink combo do you recommend? I will design the trailer based on that. Thanks!@

Please go talk this through with a licensed Mechanical Engineer.

A jet pump is not necessary, and actually undesirable.

If you contact the local American Society of Mechanical Engineers, they may be able to get you in touch with someone who would volunteer their time if you’re a charity.

Second thought, is talk to ASU, there are always Engineering students looking for Senior design projects, and the Student Chapter of ASME May take it on as a charitable project.

Excellent! Thank you so much!

Just a couple things:

What toilet flush valve, toilet, urinal flush valve, and urinal do you recommend so I can tell them?

Also, why is a pressure boosting jet pump undesirable?

Thanks!

use Sloan/Zurn flushometers. urinals have 3/4" supply. Water closets have 1" supply
you can go with the waterless urinals. You only have to replace the chemical cartridges.

Can you tell me the exact models of toilet, urinal, and flush valve combinations?

Also, why is using a jet pump bad? Here is the pump I would like to use for the whole trailer, it does 30gpm at 28psi: http://www.pdwatersystems.com/DetailProduct.aspx?id=202

Thanks!!

You aren’t raising water from a well. All you need is a simple centrifugal pump.

Couple questions bro,

How powerful should the centrifugal pump be: 25psi at 25gpm, 30psi at 25gpm, 25psi at 30gpm, or 30psi at 30gpm?

What pressure should the pump turn on at and what pressure should the pump turn off at?

Do I need a pressure tank or is it better to just use a pressure switch connected to a centrifugal pump?

Thanks!

I would install a pressure tank, to allow the pump to cycle on and off.

What flow rate is dependent on what flow demand your fixtures need.

Like I said: Get a designer involved.

I’ve designed a couple of shower trailers for fire camps. They are complex design projects, which take quite a bit of knowledge to get right.

How powerful should the centrifugal pump be: 25psi at 25gpm, 30psi at 25gpm, 25psi at 30gpm, or 30psi at 30gpm?

What pressure should the pump turn on at and what pressure should the pump turn off at?

What is the best water closet and flushometer combo? Will any work just as good?

Thanks!