Markfothebeast
Well-known member
- Joined
- 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.

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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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.

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?

Sent from my SM-G920V using Tapatalk