Harvel Clear PVC fittings incorporate state-of-the-art design using computer-generated stress analysis for optimum strength and performance. Harvel Clear fittings are manufactured to Schedule 40 dimensions from the same material to provide system uniformity and consistency in clarity. Socket-style fittings are manufactured in strict dimensional compliance with ASTM D2466 to Schedule 40 requirements. Specialty transition fittings are manufactured to Schedule 80 dimensions per the applicable requirements of ASTM D2464 (threaded)
and D2467 (socket).