SWR Pipes & fittings are made by compounding uPVC resin along with chemicals such as heat stabilizers, processing aids, lubricants, benzotriazole, phosphite based U.V stabilizers, pigments and carbon black UV stabilizers which noticeably improves the light stability of uPVC, prevents yellowing, imbritflement and loss of mechanical strength.These pipes have bell type socket at one end. Available in 40 to 160 mm sizes.