Copeland 998-0034-11 Adapter Kit

Big compressors, big Rotalock valves - and when the field line doesn't match the factory port, this is the adapter that bridges it. The Copeland 998-0034-11 steps a 2-1/4"-12 Rotalock thread down to a 1-3/8" I.D. stub tube, the size you'll run into on larger commercial reciprocating and screw compressors where the suction or discharge valve is oversized relative to the line set you're tying into.

Genuine OEM Copeland construction - machined brass body, proper thread pitch, no play or wobble at the Rotalock interface where cheaper aftermarket adapters tend to gall or cross-thread under torque. It comes complete with the Rotalock seal ring, so the connection seats pressure-tight without hunting down a separate gasket.

Key Benefits

• Heavy-Duty Thread Size: 2-1/4"-12 Rotalock thread matches large-frame compressor service valves.
• 1-3/8" Stub Tube I.D.: Sized for standard 1-3/8" O.D. copper suction/discharge lines, ready for a straight solder joint.
• Seal Included: Ships with the Rotalock gasket/seal ring for a pressure-tight connection out of the box.
• OEM Brass Construction: Machined for a precise thread engagement that holds up to repeated service disconnects.

Common Questions

• Does this include the seal? Yes - the 998-0034-11 kit ships with the Rotalock seal ring needed for a pressure-tight connection.
• Will this fit a non-Copeland compressor? Any valve using a matching 2-1/4"-12 male Rotalock thread will accept this adapter, regardless of compressor brand.
• How do I know if I need this one instead of a smaller adapter in the 998-0034 family? Match by the two dimensions - valve thread size and stub tube I.D. - not by compressor model, since Copeland uses this numbering family across several compressor lines with different valve sizes.

Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.