A heavy-duty, flexible LP gas hose built to RV and appliance standards. The Marshall Excelsior MER413-36 connects propane regulators, tanks, and appliances using standard 3/8" female flare fittings on both ends. UL listed and CGA approved, with a 350 PSIG working pressure rating and fully crimped brass ferrules that seal reliably for the life of the hose.
The MER413-36 is a workhorse hose for RV propane systems. At 36 inches long, it gives you enough reach to connect a secondary tank, extend a regulator pigtail, or replace a worn original hose on a trailer, motorhome, or portable setup -- without the awkward positioning that comes with a shorter hose.
Both ends are fitted with 3/8" female flare connections, the standard thread pattern used on most RV propane regulators, POL adapters, and low-pressure appliance fittings. The hose body is flexible thermoplastic construction, UL listed and CGA approved, and includes built-in thermal protection. Fully crimped brass ferrules at each end eliminate hose clamps and reduce leak risk at the connection point.
Rated for full propane system pressures well above typical low-pressure appliance and RV regulator operating ranges.
Crimp integrity verified by pull test -- ferrules and hose body hold together under significant tensile stress.
Third-party certified for propane (LP gas) service. Meets standards required by most RV manufacturers and inspectors.
Manufactured by Marshall Excelsior, a Michigan-based propane and gas equipment specialist with decades of industry experience.
Both ends of this hose use 3/8" female flare (FF) fittings -- also referred to as 3/8" SAE flare or 3/8"-24 UNF flare thread. This is a common standard across:
No sealant tape is required on flare fittings -- the metal-to-metal flare seat creates the seal. Hand-tighten first, then snug with a wrench. Do not overtighten.
Unlike hose assemblies that use worm-gear clamps, the MER413-36 uses factory-crimped brass ferrules on both ends. The crimp is permanent and factory-tested, so there is nothing to tighten, loosen, or check over time at the ferrule itself. Inspect the flare seat connections at the fittings regularly instead.
The hose body is flexible thermoplastic rated for propane service. Built-in thermal protection -- a woven or wrapped outer layer -- provides resistance against incidental heat sources, abrasion from rubbing against the frame or storage compartment walls, and UV degradation. This is important in propane compartments that can see elevated temperatures in warm-weather camping.
The hose itself measures 1/4" inner diameter. This is the standard ID for low-flow propane pigtail hoses used between cylinders and regulators. For high-flow appliance connections or runs over 10 feet, a larger-diameter hose may be more appropriate -- but for cylinder-to-regulator use, this is the correct size.
Marshall Excelsior backs the MER413-36 with a limited 5-year manufacturer warranty covering defects in materials and workmanship under normal use conditions.