Comparison : Item # C-4320, CGA-320 Brass Manifold Coupler Tees - 4-Way CGA Valve Outlets, Nut & Nipple Inlet
Item # C-4320CV, CGA-320 Brass Manifold Coupler Tees w/ Check Valve - 4-Way CGA Valve Outlets, Nut & Nipple Inlet
Item # C-4346, CGA-346 Brass Manifold Coupler Tees - 4-Way CGA Valve Outlets, Nut & Nipple Inlet
Item # C-4346CV, CGA-346 Brass Manifold Coupler Tees w/ Check Valve - 4-Way CGA Valve Outlets, Nut & Nipple Inlet
Item # C-4510, CGA-510 Brass Manifold Coupler Tees - 4-Way CGA Valve Outlets, Nut & Nipple Inlet