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Duotone panel — violet briefing on the left, lime-sealed detail sheet on the right.
0888820 First Check Valve Repair Kit RK 774 774DCDA CK1 2 1 2 4 16x25x2 Can be read out via Can be read out via infrared approx PN: 3338205 BACKFLOW KITS This 2 1 2 4 IN first check detector repair kit for series 774 and 774DCDA prevents the backflow of fire protection system substances from being pumped or siphoned into the potable water supply
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