Description: Wilden® Equalizer® Surge Dampener - Integrated SD Series (ISD) Plastic feature a design that integrates the dampener directly into the manifold of Wilden’s 13 mm (1/2") and 25 mm (1") P100 and P200 Pro-Flo Series bolted plastic pumps. The new ISD Series dampeners have been engineered to help extend the life and reduce noise while having the capability to easily screw onto the top of your pump without any additional hardware or piping changes. ISD Equalizers are also ATEX compliant. Minimizes vibration Controls pipe hammer Enhances downstream instrumentation Increases pump efficiency Extends pump life and reduces noise Meets ATEX II 2 GD X requirements