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Vmi 99 LD -2000 Leak Detector In addition to the previously described submersible pump problems encountered without an in - line check valve , the metering portion of the leak detector is hammered by hydraulic shock . This results in leaks going undetected . Those leak detectors are just not equipped for the job you purchased them for. The 99 LD-2000 is the answer you have been looking for. Vmi leak detectors , with an integrated check valve and pressure relief valve , will save money, reduce customer frustration at the dispenser and reduce service calls . Shortest Leak Detector Profile The 99 series leak detectors are the lowest profile leak detectors available today. Higher Level of Performance The 99 LD-2000 has a higher level of performance over a broader range of burial depth , line length , and piping system types than any other leak detector, Additional Features • Over 20 % increased flow capacity • Guaranteed for 24 months from date of installation to detect 3 GPH @ 10 PSI leak • One-Way Poppet flow path • Reverse Ratio Piston / Poppet combination • Smaller volume - faster response piston size • Shortest profile leak detector available for the "tight" installations • All fuels : gasoline , diesel , alcohols , Biodiesel , Aviation ; see Fuels under technical specifications. • All pipelines (flexible - fiberglass - steel ) up to 400 ml . resiliency • Exceeds EPA regulations (3 GPH @ 10 PSI ) • Detects leaks up to 10 ' above the leak detector • Installs with 2 " six point socket or pipe wrench Increased Flow Capacity The 99 LD -2000 has maximized the flow and flow path in existing , older submersible pump heads . This new design allows over 20 % more flow than previous LD-2000 models , maximizing pump performance for earlier pump housings . Longest Guarantee The 99 LD-2000 shares the longest guarantee available in the industry, along with all other Vmi 99 LD-2000 series leak detectors and the 99 LD-3000 series leak detectors . For 24 months from date of installation , the 99 LD-2000 is guaranteed to see a 3 GPH leak @ 10 PSI . Field Adjustable Leak Threshold All Vmi mechanical line leak detectors have been factory assembled and tested to meet the EPA leak detection threshold established during certification testing . Abnormal field conditions such as high line resiliency (high bleed- back ) , pump pressures over 30 PSI and high head pressures affect line leak detection sensitivity. Additionally, wear affects performance of leak detection over time . To meet these issues , Vmi established through certification testing , the ability of field technicians to adjust Vmi mild 's to compensate for field variables and normal wear. Please read Technical Bulletin 032805 for specific instructions on this feature . One-Way Poppet Flow Path The One -Way Poppet Flow Path isolates pump turbulence from line leak detection at pump start-up . The hardened stainless steel poppet does not dimensionally change because of thermal conditions encountered during station operation ( precision metering change is insignificant down to -20 ° F) .