Backwater Valves

Heavy-Duty Backwater Valves for Superior Sewage Flood Defense

A backwater valve is your primary line of defense against the messy and costly reality of sewer backups. Unlike standard backflow preventers that protect potable water, these specialized valves are installed on your main drainage line to ensure wastewater only flows in one direction: away from your property. When municipal sewers become overwhelmed by heavy rain or blockages, the internal flap or float mechanism automatically seals tight, preventing raw sewage from ever reaching your basement drains or low-level fixtures.

Our extensive inventory includes industry-leading solutions ranging from 2" float-model flood guards for specific floor drains to 6" no-hub cast iron valves for major commercial sewer lines. We stock trusted brands like Mifab, Watts, and Jones Stephens, offering everything from transparent-cover units for easy inspection to rugged lacquered cast iron bodies built for long-term underground service. Whether you need a simple PVC flapper or an automatic flood-gate assembly, our selection is curated to meet the strict demands of modern building codes.

Contractors and facility managers rely on 24hr Supply because we prioritize stock availability and rapid fulfillment. We maintain direct relationships with manufacturers, allowing us to offer competitive pricing and authentic technical support for every product we sell. With fast shipping across the country and a dedicated trade program for plumbing professionals, we ensure you have the parts you need to keep systems running and homes protected. Choose 24hr Supply for reliable protection and expert-vetted drainage components.