Product Information SEALED ENGINEERING CALCULATIONS BY LICENSED PE IN ALL U.S. STATES.MOST REPAIRS TRENCHLESS, REQUIRING ZERO OR MINIMAL EXCAVATION.INCREASE THE PRESSURE RATING OF THE PIPE SIGNIFICANTLY, IF DESIRED.SMOOTH FRP LINING IMPROVES FLOW CAPACITY OF PIPE. REPAIRS CAN BE APPLIED INTERNALLY OR EXTERNALLY. Please contact us for Product Data Sheets.