A ductile iron riser extends upward from underground PVC piping, passing through grade and featuring an above-ground backflow preventer assembly with control valves. A test station box is set flush with grade nearby, housing test and anode cables. Prepackaged magnesium anodes connect via #10 AWG THHN black anode cables, while #4 AWG HMWPE bond cables link across the ductile iron fittings and riser pipe joints. Polyethylene encasement surrounds the underground ductile iron fittings.
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