Numhew 3 in 2-Port PVC Backwater Valve Flange Backflow Preventer

Marketplace items sold by a third party are not eligible for Lowe’s offers.

3 in inlet and outlet size, provides dependable backflow control for matching drainage lines
PVC construction, resists corrosion and wear for long term sewer check valve use
2-port design, supports automatic one way drainage flow and helps stop reverse flow

Stepper number input field with increment and decrement buttons

Best Price. Guaranteed

Find a lower price on an exact item? We'll match it. Some exclusions apply.

FREE Returns

Return it in store or ship it back for free. Eligibility rules apply.

Pay Your Way

Credit card, PayPal or Buy Now, Pay Later options available at checkout. Your choice.

Protect your drainage system from sewage and rainwater backflow with this 3 in PVC backwater valve. The 2-port flange design supports reliable flow control, while corrosion resistant PVC helps deliver long term durability. Easy to install and automatic in operation, it is a practical backflow preventer for residential, commercial, and industrial drainage applications.

3 in inlet and outlet size, provides dependable backflow control for matching drainage lines
PVC construction, resists corrosion and wear for long term sewer check valve use
2-port design, supports automatic one way drainage flow and helps stop reverse flow
Flange inlet and outlet connections, simplify installation and create a secure pipe fit
Compact size, 7.5 x 5.6 x 5.4 in, fits in space limited plumbing layouts
Automatic operation, works without manual adjustment and reduces routine maintenance needs
Suitable for home commercial and industrial drainage, helps protect against sewage and rainwater backflow

Numhew 3 in 2-Port PVC Backwater Valve Flange Backflow Preventer

Overview

Specifications

Reviews

Community Q & A