A compact, code-compliant LP gas hose engineered for RV and camper propane systems. Both ends feature fully swiveling 3/8 in. female flare fittings so you can make connections without twisting the hose, and every connection is locked down with a crimped brass ferrule for a leak-free, long-term seal. Rated to 350 PSI working pressure and built on UL- and CGA-approved thermoplastic hose stock -- this is a direct replacement or upgrade for any application calling for an 18 in. LP hose with 3/8 in. female flare ends.
The MER613-18 is part of Marshall Excelsior's proven propane hose line, manufactured in the USA and built to meet the demands of mobile LP gas applications. At 18 inches, it is a versatile length for connecting a secondary regulator, an appliance branch, a portable cylinder adapter, or a generator propane inlet without creating slack or tension in the line.
The swivel fittings on both ends are a practical advantage during installation -- you can thread each end onto its fitting independently without rotating the hose body or fighting kinks. Once torqued, the brass flare seats form a metal-to-metal seal that does not rely on a gasket or O-ring to contain pressure.
3/8 in. female flare swivel on each end allows independent threading for clean, torque-free installation.
Full mechanical crimp at each end creates a permanent, leak-resistant bond between fitting and hose body.
Thermoplastic hose body carries UL listing and CGA approval for LP gas service -- code-compliant for RV use.
Hose includes thermal protection sleeve to guard against radiant heat common in RV underbelly and compartment environments.
Both ends of this hose use a standard 3/8 in. female SAE 45-degree flare (also written as 3/8 in. FF). This thread pattern mates directly with 3/8 in. male flare fittings, which are common on:
If your appliance or fitting uses a different thread pattern -- such as 1/4 in. flare, 3/8 in. NPT, or a POL connection -- you will need an appropriate adapter. The swivel design does not require a backup wrench on the hose end during tightening, but always use a flare nut wrench to avoid rounding the brass hex.
This 18 in. hose length works well in scenarios where appliances or regulators are close together and a longer hose would create unnecessary loops or interference:
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