LP gas powers your furnace, water heater, stove, and refrigerator — but a compromised system is a serious safety hazard. Here's what to check.
Liquid propane (LP gas) is used in almost every RV to power the furnace, water heater, stove, oven, and often the refrigerator. It's convenient and efficient — but an improperly maintained or damaged LP system is a serious safety hazard. LP gas leaks can cause explosions, fires, and carbon monoxide poisoning. Understanding your system and keeping it properly maintained is one of the most important things you can do as an RV owner.
How the LP System Works
LP gas flows from your tank (or tanks) through a regulator that reduces the high-pressure tank gas to a usable working pressure, then through a network of copper or aluminum tubing and flexible hose connections to each appliance. The regulator is a critical component — if it fails, too much or too little gas pressure can reach your appliances, causing dangerous malfunction.
Annual Inspection Requirements
The LP system in your RV should be pressure-tested annually by a qualified technician. This involves pressurizing the system with nitrogen or LP gas and checking for pressure drop — which indicates a leak. Many campgrounds and RV service centers offer this service. During an NRVIA-certified RV inspection, the LP system is evaluated as part of the standard inspection process.
- Regulator condition and age (replace every 5–10 years)
- Flexible hose connections for cracking or deterioration
- Appliance burner operation and flame color (should be blue)
- LP detector function (test monthly)
- Tank valve condition and operation
- Proper tank installation and mounting
LP Detector: Your Early Warning System
Every RV with an LP system is required to have an LP gas detector. These detectors are mounted low to the floor (because propane is heavier than air and sinks) and should alarm well before gas concentrations reach dangerous levels. LP detectors have a limited lifespan — typically 5–7 years — after which they must be replaced regardless of whether they appear functional. Check the date code on your detector and replace it if it's expired.
What to Do If You Smell Gas
If you smell propane in your RV, do not operate any electrical switches, including lights. Get everyone out immediately, leaving the door open behind you. Turn off the tank valve from outside the RV. Do not re-enter until the area has been thoroughly ventilated and a qualified technician has located and repaired the leak. Never attempt to find a gas leak with an open flame.
During pre-purchase inspections in Northwest Arkansas and the surrounding area, LP system defects — including failed regulators, deteriorated flex lines, and inoperative LP detectors — are among the most safety-critical findings that certified RV inspectors regularly uncover.