Revise and resubmit. Please submit the material specifications of the proposed HDPE pipe. (Material specifications for the U-PVC pipe has been submitted)Revise and resubmit. Specify a Globe valve which is compatible with HDPE pipes.Revise and resubmit. Specify a Check valve which is compatible with HDPE pipes.Revise and resubmit. Specify a Butterfly valve which is compatible with HDPE pipes.