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It features a flashing clamp with integral gravel guards to ensure reliable high volume drainage and an 8 inch no hub outlet for simple installation
Visual indication of failure of the second check
Z551-2NH-VP
Spec-Sport™ Specified Sport Systems
Watts CSM-81-F 2 1/2 - Part of the CSM-81-F Series Window Well Extension It features a flashing clampThis 2 1 2 inch flow measurement valve monitors system flow in medium to high flow rate HVAC units providing a highly accurate flow measurement. It consists of semi steel body construction with a low torque cylindrical plug design, flanged end connections, checked metering ports with drip caps, position indicator plate, positive shutoff, and two brass pressure taps. It is ideal in hot chilled water units such as fan coil units, water source heat