[1/4" Inverted Male Flare] PO2 12" inch Pigtail Propane Hose Connector, Connects QCC1 with Acme Nut for 2-Stage Auto Changeover Regulator
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Comparison chart showing 1/4 inch male inverted flare vs NPT thread types for PO2 12 inch pigtail propane hose.
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[1/4" Inverted Male Flare] PO2 12" inch Pigtail Propane Hose Connector, Connects QCC1 with Acme Nut for 2-Stage Auto Changeover Regulator

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[1/4" Inverted Male Flare] PO2 12" inch Pigtail Propane Hose Connector, Connects QCC1 with Acme Nut - for 2-Stage Auto Changeover Regulator, Connects Propane Cylinder to RV Van Trailer Tank

Key Features

  • Length: 12 inches
  • Hose Material: Flexible thermoplastic
  • Fittings Material: Solid brass for durability and corrosion resistance
  • Tank Connection: QCC1 (Type 1) with large plastic Acme nut for hand-tightening
  • Regulator Connection: 1/4" Inverted Male Flare
  • Pressure Rating: 350 PSI maximum working pressure
  • Safety Feature: Integrated excess flow safety device

Replaces / Cross-Reference Part Numbers

  • Model: PO2
  • Replaces other 12-inch pigtail hoses with a QCC1 tank connection and a 1/4-inch inverted male flare regulator fitting.

Compatibility & Fitment

  • Designed for use with two-stage automatic changeover LP regulators on RVs, campers, and travel trailers.
  • Connects standard 5 lb to 40 lb propane cylinders with QCC1/Type 1 valves to a regulator's 1/4" female inverted flare inlet.
  • Not for use in high-pressure applications upstream of a regulator.

When to Replace

  • Visible signs of wear, such as cracks, abrasions, cuts, or brittleness in the hose material.
  • After any propane leak is detected at the hose or its fittings.
  • If fittings are corroded, damaged, or will not seal properly.
  • As part of routine maintenance, typically every 5 to 7 years, depending on use and exposure to elements.

Installation Tips

  • Ensure the propane cylinder valve is fully closed before installation or removal.
  • Hand-tighten the green or black Acme nut onto the propane cylinder valve. Do not use tools.
  • Use a wrench to secure the 1/4" inverted flare fitting to the regulator inlet port. Use a second wrench to hold the regulator fitting to prevent damage.
  • After installation is complete, slowly open the cylinder valve and check all connections for leaks using a soap and water solution.
  • Position the hose to prevent sharp bends, kinks, and contact with hot surfaces or sharp edges.

FAQ

This hose is used to connect a propane cylinder with a QCC1/Acme-style tank connection to a 2-stage automatic changeover regulator. It is commonly used on RVs, vans, trailers, and dual-cylinder propane setups.
It is intended for systems that use a standard Type 1/QCC1 propane cylinder connection on the tank side and a pigtail connection to a 2-stage auto changeover regulator on the appliance side. To confirm fit, match both the tank connection style and the regulator inlet connection on your current hose before ordering.
Common signs include the smell of propane near the hose, visible cracking or stiffness in the hose jacket, damaged fittings, regulator leak-test failures, or intermittent gas flow from the cylinder to the regulator. Replacement is also a good idea if the hose has been exposed to weather for long periods and shows wear around the ends.
Installation is usually straightforward for a like-for-like replacement. Shut off the propane cylinder completely, disconnect the old hose, attach the new hose to the regulator and cylinder, then slowly reopen the tank valve. In many cases, basic hand tools are all that is needed on the regulator side, while the Acme/QCC1 tank nut is typically hand-tightened. Always perform a leak check with an approved leak-detection solution after installation.
Inspect the regulator inlet, tank valve threads, and any sealing surfaces for dirt, damage, or corrosion. Make sure the old hose routing did not place the line under tension, kinking, or rubbing against metal edges. If your system has two cylinders and an automatic changeover regulator, check the second pigtail as well, since both hoses often age at a similar rate.
They commonly fail from outdoor exposure, vibration during travel, repeated cylinder changes, and age-related hardening of the hose material. On RVs and trailers, movement and weather are frequent causes. Damage is also more likely if the hose is bent sharply, twisted during installation, or allowed to rub against nearby brackets or frame components.