Quick Answer
To join copper and poly propane lines, use a flare nut connection with a copper flare nut adapter, then a flare-less connection with a poly propane flare-less adapter, ensuring a secure and leak-free seal.
Choosing the Right Adapters
When joining copper and poly propane lines, it’s essential to choose the correct adapters to ensure a secure and leak-free connection. Copper flare nut adapters typically have a 45-degree flare on the copper side and a 37-degree flare on the poly propane side. For example, a 1/2-inch copper flare nut adapter can connect 1/2-inch copper lines to 1/2-inch poly propane lines.
Flare Nut Connection
To establish a secure flare nut connection, follow these steps: (1) deburr the copper flare on the copper line, (2) apply a thin layer of sealant to the copper flare, (3) attach the copper flare nut adapter to the copper line, and (4) hand-tighten the flare nut connection. Tighten an additional 1-2 turns with a wrench to secure the connection.
Flare-Less Connection
For a flare-less connection, attach the poly propane flare-less adapter to the poly propane line, then connect the adapter to the copper line using a flare nut connection. Apply additional sealant to the flare-less adapter and tighten the flare nut connection according to the manufacturer’s specifications.
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