• FM Approvals 1221

FM Approvals 1221

  • Backflow Preventers (Reduced Pressure Principle and Double Check Valve Types)
  • standard by FM Approvals, 02/01/1987
  • Category: FM Approvals

$50.00 $25.00

This standard states FM Approval requirements for backflow preventers of the reduced pressure principle or doubel check valve types
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