Armstrong D3449-1 Connector is2 r-l w/val for IS-2 Universal Connector

Armstrong part D3449-1: connector is2 r-l w/val for the Armstrong IS-2 universal connector (IS-2).

Armstrong's IS-2 stainless steel universal connector with integral strainer makes installing and removing any two-bolt steam trap quick and simple. The full-line stainless strainer removes leak points and can be fitted with an optional blowdown valve. It accepts Armstrong two-bolt inverted bucket, thermostatic, disc, bimetallic and float and thermostatic traps as well as other manufacturers' two-bolt traps.

Manufacturer documentation for the IS-2: data sheet.