Backwater ValvesCast Iron
Prevention of sewage backflow into buildings with swing-check (Series 67500, 67600, 67400), terminal-type (Series 67720, 67800), ball-float (Series 67100A), and combined-drain (Series 67650) valves. Multiple connection options including Hub & Spigot and No-Hub.
Product Specifications
Key Features
Common Applications
Backwater Valve FAQs
Common questions about Josam Backwater Valves
Josam offers swing-check type with bolted cover, swing-check with no-hub connections, terminal type swing-check, ball-float type, and combined drain with swing-check valves.
Josam backwater valves are available with Hub & Spigot, No-Hub, and Hub Connection options to match various piping systems.
Backwater valves prevent sewage from backing up into buildings during sewer line surcharges, protecting property from sewage damage.
Popular series include 67500/67600 (swing-check with bolted cover), 67400 (no-hub swing-check), 67720/67800 (terminal swing-check), 67100A (ball-float), and 67650 (combined drain).
Where Backwater Valves Protect Buildings
Related product types
- Backwater & drainage valves — compare swing-check, ball-float, and combined-drain types.
- Catch basins — below-grade collection points that often need backflow protection.
- Detention systems — downstream storage where backflow prevention matters.
Common applications
- Restaurants and commercial kitchens — protect floor drains from sewer surcharge.
- Hospitals — safeguard lower-level fixtures against backflow.
- Below-grade parking structures — prevent sewage backup at the lowest level.
Need Backflow Protection?
Josam backwater valves provide reliable sewage backflow prevention for commercial and residential applications. Many install alongside accessible cleanouts for inspection and maintenance.