This 50NB NB rubber gasket is designed for use between flanged fittings, Vanstone stubs, and drilled flanges to create a watertight, pressure-rated seal. Manufactured from quality rubber for durability across a range of temperatures and fluid types. Compatible with PVC Vanstone flanges, fixed drilled flanges, and steel flanges to AS 4087 Table D drilling. Essential for all flanged PVC pressure pipe connections in water supply, irrigation, and industrial systems.