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For years, technicians have installed and left behind Quick Connect fittings (or a short length of pipe or hose with a ball valve) in the shear valve port. These fittings allowed quick, dry, and easy access to the line without trying to drain pressurized fuel out through the plugged access port in the shear valve. The plugs in these valves are hard to remove and often rounded. Worsening an already bad situation, the plug is often facing the wrong direction. They regularly drip and spurt fuel, sometimes activating the sump sensor. When the plug is reinstalled after testing, it may leak as the threads are frequently worn. Too often, the shear valve housing is cracked over-torqueing the plug to stop weeping. Technicians arriving at sites with known or suspected high line resiliency (bleed- back) can now trip the shear valve, remove the filter, install the TAP, and drain the rest of the product quickly and safely prior to testing.
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