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Precision Fit: Engineered to match factory specifications for gas flow and water heater sensor accuracy
though it should be inspected periodically for debris
leak-free mechanical interface
the burner orifice may be restricted or improperly sized for the manifold pressure
It is primarily used with 1-1/4" to 3" NPT RV110
Watts 0061935 Preventer Els PW 17895 Precision Fit: Engineered to matchThe Watts 0061935 is a professional grade 1 2 inch dual check valve backflow preventer engineered specifically for continuous pressure, non health hazard applications. Often cross referenced as the Watts 9D M3 or Watts 9DM3 1 2, this unit is identical in fit and function to the legacy 9D 1 2 model. It features a high durability forged brass body and an intermediate atmospheric vent that provides a visible signal by discharging water if the downstream
