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Backflow Valves

Backflow Valves
Complete Plumbing Source’s Backflow Valves are designed to prevent the backflow of heating system fluid and contaminated water from drinking water. They have a dual check design with a vent and are made from brass.
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  1. Caleffi 573403A 1/2" NPT Female Dual Check Backflow Preventer w/ Atmospheric Vent
    Caleffi 573403A 1/2" NPT Female Dual Check Backflow Preventer w/ Atmospheric Vent
    $56.50 As low as $54.00
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  2. Caleffi 573503A 3/4" NPT Female Dual Check Backflow Preventer w/ Atmospheric Vent
    Caleffi 573503A 3/4" NPT Female Dual Check Backflow Preventer w/ Atmospheric Vent
    $58.50
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