How to find the right RV Gas Supply Parts & Accessories AI guide
Written by an AI model from its trained knowledge.
What the AI looks for in RV Gas Supply Parts & Accessories
- Regulator type
- Use a two-stage regulator for the RV's fixed system, delivering low pressure of about 11 inches water column to appliances; choose an automatic changeover model for dual-cylinder setups. Single-stage regulators let appliance pressure drift as the cylinder empties, which hurts burner and furnace performance. Changeover lets the second tank take over without interrupting the fridge or furnace.
- Cylinder valve connection
- Match the pigtail end to the cylinder valve: modern OPD cylinders take QCC1 (Type 1, ACME nut) fittings, while older or some ASME setups use POL. Match the regulator inlet thread to the pigtail as well. Mismatched ends will not seal or will not thread at all. Most returned propane parts were bought for the wrong connection type.
- Fitting thread type
- Identify each joint as either flare (common RV sizes are 1/4 and 3/8 inverted or SAE flare) or tapered pipe thread (NPT) before buying adapters. Flare fittings seal metal-to-metal, and pipe threads seal on the threads. They are not interchangeable even when the diameters look similar.
- Cylinder requalification date
- DOT cylinders must be requalified 12 years from the stamped manufacture date, and then at intervals set by the requalification method. Check the collar stamp before buying an adapter or swapping a tank. Refill stations will refuse to fill out-of-date cylinders regardless of condition.
- Detector placement and service life
- Mount LP detectors low, near the floor, because propane is heavier than air. Replace the unit when it reaches the end of the service life the maker states. A detector mounted high or past its rated life gives false reassurance.
- Hose and regulator listing
- Buy hoses and regulators listed for LP gas service and rated for the pressure on that side of the system (high-pressure pigtails sit upstream of the regulator). Low-pressure hose on the cylinder side, or unlisted hose, is a leak and fire risk.
Brands that matter
- Marshall Excelsior: Major maker of RV two-stage and auto-changeover regulators and pigtails, common as OEM replacements.
- Camco: Broad RV propane range of pigtails, regulators, gauges and adapters, widely stocked.
- Flame King: Cylinders, adapters, hoses and regulators aimed at RV and outdoor use.
- Mr. Heater: Hoses, adapters and filters, particularly for connecting portable heaters to bulk cylinders.
- Fairview: Brass LP fittings and adapters in flare and pipe-thread sizes.
- Worthington: Established maker of DOT propane cylinders, including RV-sized ones.
- Manchester Tank: DOT and ASME propane cylinder manufacturer.
- MTI Industries Safe-T-Alert: RV-specific LP and carbon monoxide detectors sized for factory cutouts.
What to avoid
- Single-stage regulators used as the main regulator for an RV's appliance system.
- PTFE tape or pipe dope on flare fittings, which seal by the flare and can be pushed out of seat by the tape.
- Unbranded hoses or adapters with no LP gas listing.
- Regulators mounted with the vent facing up or with no protective cover, where rain and ice can block the vent.
- Using an out-of-date cylinder with a new adapter instead of requalifying or replacing it.
Questions
Do I put tape or sealant on propane fittings?
Only on tapered pipe threads (NPT), using a sealant rated for gas. Flare and QCC1 connections seal without tape. Leak-test every joint with soapy water after any change.
My regulator ices up or the flame is weak in cold weather. Is the regulator bad?
Not necessarily. Low cylinder pressure in the cold, or a cylinder that is nearly empty, can cause this. A regulator vent that is blocked or iced over can also restrict flow. Check vent orientation and tank level before replacing parts.