A check valve does one thing automatically: it lets flow pass in one direction and closes when flow reverses. On a pump discharge that single function protects the impeller from backspin, keeps the column of water from draining back, and limits the surge that follows a sudden stop.
The Niagara range
The range includes single check valves and double check valve assemblies for applications requiring an additional layer of backflow protection.
Applications
Pump discharge lines, booster set manifolds, fire protection systems, potable water backflow prevention, and irrigation headers.
Selecting a check valve
Match size and pressure rating to the line, and consider closing characteristics — a slow-closing valve on a long discharge main will reduce water hammer.
NIAGARA Check Valve – Model CB420
Durable bronze swing check valve with a horizontal pattern and metal-to-metal seat. Designed for reliable one-way flow control, automatically closing to prevent backflow under reverse pressure.
NIAGARA Check Valve – Model CB432
Durable bronze check valve with a horizontal lift pattern and metal-to-metal seat for enhanced sealing. Designed to ensure reliable backflow prevention and long-lasting performance under high pressure and temperature conditions.
NIAGARA Check Valve – Model CB4325
Durable bronze swing check valve with a horizontal pattern, designed to prevent backflow and ensure one-way flow. Built with high-quality materials and available in various disc options for different applications.
NIAGARA Check Valve – Model CB4325W
Durable bronze swing check valve with a horizontal pattern, designed for one-way flow and automatic closure against reverse flow. Available in multiple disc materials to suit various system requirements.
NIAGARA Check Valve – Model CS1W
Spring-loaded, non-slam check valve with flanged ends, designed for domestic water systems. WRAS approved and coated with fusion-bonded epoxy for superior corrosion resistance and durability.
NIAGARA Check Valve – Model CS2W
Double spring-loaded, non-slam check valve designed for high-reliability water systems. WRAS approved, featuring a resilient seat and fusion-bonded epoxy coating for excellent corrosion resistance.
NIAGARA Check Valve – Model CS3
Heavy-duty cast iron swing check valve suitable for horizontal or vertical installation. Designed for water and liquid systems, offering reliable backflow prevention under high pressure and temperature conditions.
NIAGARA Check Valve – Model CS4 / CS4 ANSI
Reliable cast iron swing check valve designed for water and liquid systems. Features a bolted cover and dual flange standards (BS EN and ANSI) for flexible installation in horizontal or vertical pipelines.
NIAGARA Check Valve – Models CS5 (PN16) / CS5A (ANSI 125) / CS6 (PN25) / CS5W (PN16)
Dual plate wafer check valve with spring-assisted, non-slam design for quiet operation and efficient backflow prevention. Equipped with EPDM rubber seat for improved sealing and suitable for potable water and pump duty applications.
NIAGARA Double Check Valve – Model CS2W / CS2CW
Double check valve designed to prevent backflow and contamination in potable water systems. WRAS approved, made from DZR brass, and ideal for domestic, public, and commercial installations.
