Top Brand Check Valve, 1 4 in, Single, Inline Ball Cone, PVC, MNPT x FNPT PVC CHK 426 4M4F F Capacity 400 Single fold towels Gravel bags are a basic Gravel bags are a basic BMP (Best Management Practice) used to meet regulatory requirements for stormwater and erosion controlThe sizes are industry standard and allow the user to fill them up with as much or as little gravel as the application requiresDifferent sizes lend themselves to different applications The Bradley S19224FWPT Halo Eye Facewash Station is a wall mounted eye facewash unit that exceeds the American National Standard Z358 A flow arrow marking on the body points from the inlet to the outlet Valve features good chemical resistance and is suitable for a wide range of air and fluid applications