What is the Maximum Length for a Propane Hose

Updated 10/22/2025 | Published 07/26/2023

Products Featured in This Question

MB Sturgis Propane Extension Hose - Dual Type 1 Tank Valve - 20'

(66)

$86.06

Question:

i have 40 and 100 lb propane tanks that i use on my generator whne power is out the 100 lb is taller so i would like to replace the line coming out or my generator to be able to move the 100 tank away some both have the QCC connection not sure what the max line length can be thanks

asked by: Lew

Expert Reply:

Technically there is no limit to how long a propane hose can be. However, the general consensus is that it should be no longer than 20' like the # 1000914-240-MBS. Any longer than 20' and you may experience problems with pressure and flow.

expert reply by: Robin H

Ken

2/20/2024

My 33ft rv has tanks on the tongue and the kitchen in the back. With the route of hose I'm guessing it's close to 36ft run. Is this not good.

Kyle S.

2/21/2024

@Ken I'm sure yours was designed this way and the length was accounted for so it is not something I would be concerned with.

Nick

10/22/2025

I need to squeeze 25 - 30' out of my set up between the tank and a 199k btu tankless water heater. Are there any tricks I could use to get those last few feet. I'm wondering if I use the 20' hose and then size up to 3/4" gas pipe (Which is what the machine accepts at the gas inlet) if that would give me the supply I need. Additionally should the regulator be near the tank or the appliance?