The Suburban 523009 is a purpose-built LP pigtail hose that bridges a standard propane cylinder to a two-stage regulator. At 20 inches long with a 1/4" inside diameter, it gives you enough working length to connect portable tanks without awkward positioning, and the thermal protection wrap guards the hose where heat or abrasion is a concern.
Pigtail hoses are one of those components that rarely get replaced until there is a problem -- a cracked fitting, a stiff hose that no longer seals, or an upgrade to a new regulator that demands a fresh connection. The Suburban 523009 is designed for that exact job: connecting a standard Type 1 (POL-style ACME threaded) propane cylinder valve to a two-stage regulator with a 1/4" inverted male flare inlet.
This hose is commonly used in RV LP systems where a dedicated pigtail runs from a mounted or portable cylinder to the primary stage of a dual-stage regulator. The 20" length works well in standard RV LP compartment configurations where the tank and regulator sit in close proximity.
Left-hand ACME threaded nut fits standard Type 1 propane cylinder valves -- the most common valve style on DOT cylinders used in RV applications.
Outlet end connects to regulators and LP manifolds with a standard 1/4" inverted flare female fitting -- no adapters needed for typical two-stage regulator inlets.
The hose includes a thermal protection sleeve to resist radiant heat and abrasion, extending service life in tight or warm LP compartments.
Enough reach to accommodate most RV LP tank-to-regulator configurations without excess slack that can kink or bunch in a compartment.
In a typical RV LP system, the propane cylinder feeds a two-stage regulator through one or two pigtail hoses. Each pigtail is connected at one end to the cylinder valve and at the other end to the regulator inlet or an automatic changeover valve. The Suburban 523009 fills the pigtail role on the cylinder side for systems using Type 1 ACME cylinder valves and regulators with 1/4" inverted flare inlets.
As a Suburban Mfg factory part (p/n 523009), this hose is a direct OEM-equivalent replacement for Suburban LP systems. No modifications or adapters are needed when replacing a same-spec pigtail in a Suburban-configured propane system.
Before ordering, confirm both ends of the hose you are replacing match this configuration:
Type 1 (also called QCC1 or ACME) valves have become the standard on most post-1998 DOT cylinders sold in the US. They have a large, externally threaded collar that accepts a hand-tightened ACME nut. Older POL valves (also called Type P or left-hand male threads) require a different pigtail connection. Check your cylinder valve before ordering.
Pigtail hoses should be visually inspected at least once per season. Look for brittleness in the hose body, corrosion at the fittings, and any deformation of the flare seat. A properly maintained pigtail hose that seals correctly is one of the simplest steps to safe LP system operation.
This pigtail hose is typically used alongside a two-stage LP regulator and, in dual-tank setups, an automatic changeover valve. If you are rebuilding your full LP supply line from the tanks to the regulator, consider sourcing both pigtail hoses, the regulator, and a new supply hose from tank to appliances at the same time to ensure all components are in serviceable condition.