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Our selection of swing check valves delivers consistent, directional water control for a wide range of NFPA-compliant applications. The brass-bodied swing check valves are designed to prevent reverse flow and are ideal for use in fire sprinkler systems, including risers, fire pump sensing lines, floor control applications, and more.
Our selection includes multiple NPT x NPT sizes, rated working pressures up to 250 PSI, and cast brass construction to withstand corrosive environments. Whether you're maintaining a commercial system or outfitting a new installation, shop high-quality fire protection valves that meet the demands of modern fire protection.
A swing check valve typically features a globe-style valve body with a hinged valve disc that blocks reverse flow. They play a key role in securing water-based systems by preventing reverse flow under pressure. When system pressure changes, the internal clapper swings shut to block backward movement.
This simple mechanism helps maintain system integrity and reduces contamination risks. Every valve in this collection supports water, oil, and gas service up to 200 WOG, providing a consistent solution for backflow prevention across various installations.
This collection includes various valve sizes ranging from 1/2 in. to 2 in., all featuring NPT x NPT connections. These National Pipe Thread connections allow smooth integration with standard iron pipe sizes. Each size supports a fixed pressure rating, either 200 PSI or 250 PSI, depending on the model. These valves cover the full range of small to mid-size fire protection lines, making them suitable for many standpipes, fire sprinkler risers, fire pump sensing lines, and supply piping where direction control is essential. They can also be used in non-potable plumbing systems.
We supply brass swing check valves from well-known manufacturers, including FPPI™ and Lansdale™. These brands deliver high-quality valves that meet the daily demands of fire protection work. Each product includes detailed specifications, exact thread sizing, and pressure capacity, so you can select the right valve with confidence.
Browse individual product pages for measurements, compatibility details, and other specific information.
If you have questions about sizing or performance, our customer service team is here to help you find the answers you need. You can also refer to our blog for guides on check valve installation, maintenance tips, and best practices.
With fast US shipping and expert customer support, QRFS keeps your fire protection systems code-compliant and ready to perform. QRFS also stocks a range of threaded butterfly valves, grooved butterfly valves, wafer butterfly valves, OS&Y valves, and more.
Add the right fire protection products to your cart and complete your order in minutes to keep your project on schedule.
What is a swing check valve, and how does it work?
A swing check valve allows water to flow in one direction and prevents reverse flow using a hinged disc. When water flows forward, the disc swings open; when flow stops or reverses, gravity and backpressure push it closed. This simple, automatic operation helps protect fire protection systems from backflow.
Where are check valves used in fire protection systems?
Check valves are used in fire sprinkler and standpipe systems to maintain directional flow. They are often installed on system risers, near fire department connections, and on auxiliary lines. Their role is to help ensure water moves where it’s needed without flowing backward into the supply.
What materials are swing check valves typically made from?
Swing check valves are commonly made from brass, bronze, or iron, depending on size and application. Brass models are often used in smaller sizes because they offer corrosion resistance and durability. Larger valves may use iron bodies for strength in higher-capacity systems.
What pressure ratings are typical for swing check valves?
Pressure ratings vary by design, but many swing check valves used in fire protection are rated up to 175, 200, or 250 PSI. These ratings ensure the valve can handle normal system pressures and surges. Always verify that the valve’s rating matches your system requirements.
What is the advantage of a swing check valve compared to other types?
Swing check valves offer low resistance to flow because the disc fully swings out of the waterway. This makes them ideal where maintaining flow efficiency is important. They also have a simple design with fewer internal components compared to spring-loaded or diaphragm check valves.
Do swing check valves require maintenance?
Yes. NFPA 25 requires swing check valves to be inspected, tested, and maintained to ensure proper operation. They must be internally inspected every five years to confirm the disc moves freely and is not obstructed, damaged, or corroded. These valves are also evaluated during system flow testing, and any issues, such as leakage or sticking, must be corrected promptly.
What connection types are available for swing check valves?
Many swing check valves are available with threaded (NPT or IPS) connections, which are common for smaller pipe sizes of 2 in. or fewer. These threaded ends allow for straightforward installation without specialized fittings. For larger systems requiring bigger valves (2 to 12 in.), swing check valves are available with grooved or flanged connections depending on the application.
Can swing check valves be used in fire pump sensing lines?
Yes, certain swing check valves are designed for fire pump sensing lines and may include an orifice. This orifice helps regulate pressure changes and prevent false pump starts caused by surges.
What features should I look for when selecting a swing check valve?
Key factors include size, pressure rating, material, and connection type. You should also consider whether the valve includes features like accessory ports or orifices for specialized applications. Choosing the right valve ensures compatibility with your fire protection system and long-term reliability.