Watts 4 909 NRS


Backflow Preventer, 4 In, Cast Iron

4 909 NRS 376943
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$3,789.08 + 5 Business Day Shipping $361.40
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ItemBackflow Preventer
TypeReduced Pressure Zone, Non Rising Stem
Material of ConstructionCast Iron
Temp. Range (F)33 to 110
Max. Temp. (F)110
Max. Pressure (PSI)175
Width (In.)12-3/16
Length (In.)55-1/8
Standards USC
Weight 546.000000


Backflow Preventer, Reduced Pressure Zone, Non Rising Stem, Size 4 In, Flanged Connection, Material of Construction Cast Iron, Temp Range 33 To 110 F, Max Pressure 175 PSI, Width 12 3/16 In, Length 55 1/8 In, Standards USC

Reduced-Pressure Zone Backflow Preventers
  • Watts Series 909
  • Help prevent the reverse flow of polluted water into the potable water supply due to backsiphonage and backpressure.
  • 2-1/2" to 4" models have flanged end connections.
  • 1KYC1, 1KYC2, 1KYC3, 1KYC4, 1KYC5, 1KYC6, 1KYC7, 1KYC8 meet ASSE 1013, AWWA C-511-92, CSA B64.4; 1KYD1, 1KYD3, and 1KYD5 meet USC standards.
  • Bronze body; except Watts Series 909 1KYD1, 1KYD3, and 1KYD5 are cast-iron Max. pressure: 175 psi NPT connections, except Wilkins Series 975XL is FNPT

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