Description Manuals Videos Articles Clemco Part #28557 1-1/4" National Pipe Thread Check Valve for WetBlast Flex Base Unit Injector. WetBlast Flex Base Unit Injector Item # 27 Dustless (Wet) Sandblasting Benefits Slurry Blast, Venturi Blast, and Vapor Blasting Is Dustless Blasting Really Dustless? Related Parts (5) Parts Included (5) Swivel connector, 1/4 npt #23829 $17.23 569 1-1/4" NPT x 4" Nipple #01720 $9.76 1014 1/4" NPT Flow Control Valve #05528 $91.59 1034 1/4" NPT CBM Gauge #11830 $37.97 1052 3/4-NPT Ball Valve w/Handle #28551 $52.62 1067 Customers Also Viewed 1/4" NPT CBM Gauge #11830 $37.97 1-1/4" NPT x 4" Nipple #01720 $9.76 3/4-NPT Ball Valve w/Handle #28551 $52.62