Dr of BBQ
After further thought, I think I want to go electric. I do not want to pipe LP to that side of the food truck. Based on my design, I planned to have a 100lb tank mounted on the driver rear and piped through for the steam table and griddle. I would have to do some elaborate piping underneath the truck to cleanly divert LP to the passenger side and under the sink. Also the LP heaters need to vent and I do not think this will work under my sink.
Just a thought or two from a different prospective. Runing LP gas lines is a pice of cake and it's not hard to find a good plumber that will do it after working hours for cash.
If your going to put a 100 Gal tank under your truck how will you fill it? Will you have to drop it and haul it to an LP dealer to have it filled? That's a hassle if the weather is anything but bluebird skies. And what do they weigh full. Remember they never need filling unless it's raining or snowing and your in good clothes.
All you need to vent your water heater is a ninety degree double walled pipe and a hole saw. Again a job your after hours plumber is experienced at. Add a collar for the outside and a steel dryer vent cover and your good to go. Remember an instant hot water heater takes no recovery time unlike an electric unit. And if your talking about an electric instant hot water heater, oh boy start looking for a generator the size of a VW. Well LMAO it won't need to be that big but close.
Ok one other thought if you install equipment across the back doors everything you bring in or take out must fit through your passenger side door. That includes coolers, sinks, freezers, any time you change or replace any large piece of equipment you'll need to move what ever is in front of your back doors or somehow get it out the smaller front door, so plan ahead on what ever you put in front of your back doors.
I ran all of my propane lines myself. It is truely very easy, and unless you do not feel very safe doing it yourself definitely find a plumber like Jack said. I used black lines and it is very flexible and forgiving.
I use two 10 Gal propane tanks and run a Wok, Fryer, and a single burner griddle on them. I have to refill once a week. I have two spares that i just rotate in with the empty ones at the end of the night. Anything bigger than a 10 Gal tank is HEAVY. If you go that route, you will have to place the tank somewhere where you can lean the tanks down onto a truck bed to go get them refilled. There's a local taco trailer that i have seen that uses that method.
I also second Jack on the fact that you need to have a large opening on the back for equipment replacement. I've had to pull out my single door fridge and replace it with a double door fridge in the past and i am glad i kept the back doors wide and accessible.
My recommendation would be to keep as many items on propane as possible. It keeps the gas costs down and also keeps your genny much quieter. I run a Honda EU 3000i, which imo is a great generator, and i still hate how loud it is at peak when i run my rice cooker which is electric.
Jack, do you have a link to any possible detailed pictures of a tankless water heater set-up with the venting included? I would like to ditch the electric ASAP.
And please, anyone who has any rebuttals with some good points let us know!