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LPG Line/Regulator

Markfothebeast

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Jul 29, 2016
Messages
419
I figured this might be something to ask in the heating forum since it is in relation to heating and Lpg.

I found this outside at the neighbors near the woods in a pile of random farm stuff and they let me haul it off. It is a Royal RFS-40 commercial deep fryer. I figured it'd be good in the garage for football games and also fit behind the bar.

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What type and size of line is typically run to a 105,000 BTU/HR appliance such as this? I'm assuming typical threaded black steel piping but not quite sure if there's a size requirement. Our home furnace and water heater both run off a 3/8" ID copper line so I would imagine 1/2" or 3/4" would be more than adequate. I'd like to run a small 20# tank to it but I'm wondering if a small tank puts out enough fuel to keep this device operating properly. 1 gallon of LPG appears to put out somewhere around 90k BTU but are there other factors involved such as the pressure? I can get a 100# tank if needed.

This sticker appears to show that manifold(?) Pressure is regulated at 11.0 (psi?). I haven't looked to see if something like this has an internal regulator or if perhaps I need an external or secondary unit on the tank itself. I was unable to find a manual online. And if manifold psi is 11.0 and the LPG line is only 8ft or less, what would the regulator pressure need to be set at?
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Markfothebeast

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I've had a change of mind for its use. It'd be better off as an auto parts cleaner. I have no experience with those parts cleaner machines but I'm interested in what is heated to soak parts in.

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Markfothebeast

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Jul 29, 2016
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I took a better look inside to see if there's a regulator in there. And I found a surprise family of chipmunks. The plumbing for the LPG is already in there (3/4") and comes out the back. Looks like I probably just need a regulator on the tank.

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Adk Mike

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Jan 13, 2014
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331
Location
upstate NY
IF you run it off a copper line you'll need 5/8 line. You'll need the tank 30 feet away or less if you use a twin stage system. If your running it off a big tank in the yard it will need to be 2 staged.
Doable for sure I lay these out everyday in my day job. PM me if I can help you.
 
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Markfothebeast

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Jul 29, 2016
Messages
419
I probably won't be connecting it to our main house LPG tank. Just a basic 5 gal tank if possible. It will be plumbed directly out the garage wall with black steel or 3/4" copper pipe since I have that laying around. It needs a good cleaning. Is it safe to use this as a parts cleaner with water and maybe washing soda?

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