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Due to an extreme amount of orders, customer service will be delayed in responding to inquiries. All orders made online will be shipped on-time. Thanks for your patience.

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
    $45.00 As low as $41.67
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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
    $48.50
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