Diaphragm Assembly, Internal, No Spring, for AV1100 Spray Valve, UnitedBuilt AV1100 SK Groove by Weld Water Truck Plumbing Flexible grooved Length:4 3 8" Water Truck Plumbing Flexible grooved connections in compatible water distribution and pump piping Industrial Piping Mechanical joining of compatible grooved steel piping Construction & Mining Grooved piping systems where controlled joint flexibility is useful Service & Repair Replacement or new installation of Victaulic Style 177N flexible couplings This will increase the lifespan of your fluids and your system as a whole durable sealing element designed for AV1100 valve operation High Impact Retainers Top and bottom retainers manufactured from high impact no break copolymer polypropylene Machined Acetal Nut Black acetal copolymer nut is precision machined for dimensional stability and wear resistance Machined Aluminum Bolt Manufactured from 6061 T6511 extruded aluminum Serviceable Design Allows the AV1100 internal assembly to be rebuilt without replacing the complete spray valve Made in USA All components of the AV1100 SK assembly are manufactured in the United States Specifications