Watts 0794107 – lfrk 909 s 4" 1st or 2nd check seat this check seat fits the 4" watts 909 series reduced pressure zone (rpz) backflow preventers. This seat will fit either the first or second check assembly. To remove the old seat, slide two retainer wires out from under seat and pull seat straight up. Be sure to lube the o-ring before installing new seat. No special tools are required for servicing. Genuine watts replacement parts.
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