Pipe Ends 2" Male NPT x Female 2 TPI Flush Thread. Johnson PVC open core Surge Blocks are used in well rehabilitation or well development. These units come standard with a Female FJT Thread on one end and a Male NPT Thread on the other end. They are constructed of PVC and HDPE and designed to fit the I.D. Schedule 40 PVC pipe. Surging and Rehab:This Surge Block can be used in well rehabilitation and cleaning. By capping the end of the PVC pipe connected to the Surge Block, you can plunge the well and force the well water and cleaner into the surrounding formation. In addition, the rigid HDPE flanges help remove any additional scaling on the inside of the casing and screen. After surging, wait the recommended time for well treatment and discharge the well water. Developing:The Surge block can assist in developing a well. By connecting a ball valve or check valve above the surge block, you can develop the well through repeated up and down motion of the connected pipe. SpecificationsPVC Size: 4"Schedule: 40Connection Pipe Size 1: 1.25" Male NPTConnection Pipe Size 2: 1.25" Female Flush ThreadMaterial: PVC and HDPE with SS set screwsCheck Ball: NoNumber of Flanges: 2
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