Image Expansion Ring Coupling for Single Jacket Hose, Brass Markets Fire Protection Jump to Section Product Options Related Products Product Options Part Number Bowl Size Hose Size Thread Material RS15175 1-3/4" 1-1/2" NPSH Brass RS15175F 1-3/4" 1-1/2" NST (NH) Brass RS15181F 1-13/16" 1-1/2" NST (NH) Brass RS25281F 2-13/16" 2-1/2" NST (NH) Brass Related Products Image Expansion Ring Image Expansion Ring Coupling for Double Jacket Hose, Aluminum Image Expansion Ring Coupling for Double Jacket Hose, Brass Image Expansion Ring Coupling for Single Jacket Hose, Aluminum Image Tail Washer