Middle Atlantic 1126A-1/4 2-Inch to 1/4-Inch IPS Adapter
Overview
The Middle Atlantic 1126A-1/4 is a threaded adapter that converts 2-51mm IPS preset or afterset insert fittings to a 1/4-inch IPS connection. At 0.25 in (6.4 mm) in diameter, this fitting addresses the common field scenario where a rough-in preset or afterset insert terminates at a larger IPS thread but the downstream fitting or device requires a 1/4-inch IPS port — eliminating the need for improvised adapters or custom machining on the floor. TAA compliance makes it suitable for federally funded or government-contracted installations where domestic sourcing requirements apply.
Compatibility
Designed for use with Middle Atlantic 525 Series in-floor service fittings, specifically preset and afterset inserts with 2-51mm IPS openings. Verify the IPS thread size on your insert before ordering — this adapter targets the 525 Series family and is not a universal IPS fitting. Confirm thread pitch compatibility with any downstream 1/4-inch IPS device or coupling before installation.
Installation Notes
Thread engagement is critical on small-diameter IPS fittings: hand-tighten first to confirm thread alignment, then snug with an appropriately sized wrench — overtorquing a 0.25 in fitting risks thread damage. No sealant requirement is noted in evidence; follow the governing specification for the insert assembly. Intended for use in finished floor or raised-floor service fitting installations where the 525 Series insert is already set.
