If you are searching for an 8-inch swing check valve, none of the listed products is identified as 8 inches; the largest listed size is 2 inches. The options below cover smaller threaded and flanged valves, including stainless steel, brass, and carbon steel models. The Anix is best for a 2-inch flanged connection, while the Megairon and Dsmpipeft are threaded stainless steel choices. Eastman is a brass option for plumbing systems. Confirm the required pipe size, connection, material, and operating conditions before buying.
| Product | Listed size | Connection or material | Best for |
|---|---|---|---|
| Anix | 2 inches | Flanged, carbon steel | Larger flanged systems |
| Megairon | 1 inch | Female NPT, SS316 | Threaded stainless steel piping |
| Dsmpipeft | 3/4 inch | Female NPT, SS316 | Smaller threaded lines |
| Eastman | 1 inch IPS | Brass | Water and plumbing installations |
| SYWUWV | 3/4 inch | NPT, brass | Horizontal one-way flow applications |
Anix 2-Inch Flanged Carbon Steel Valve
The Anix valve is the largest listed option, at 2 inches, and is the closest size match if your system needs a larger valve. Its body is cast carbon steel A216, with a raised-face flange end and bolted cap. The flanged connection is specified as conforming to ASME B16.5.
Best for: Buyers who need a 2-inch flanged swing check valve for a compatible piping system. It was selected for its larger listed size and clearly specified flange construction.
Limitation: It is not an 8-inch valve. Confirm flange dimensions, class, and system requirements before selecting it.
Megairon 1-Inch SS316 Swing Check Valve
This 1-inch valve has a stainless steel 316 body and disc, a screwed cap, and female-to-female NPT ports. The listing gives a 200 WOG working-pressure description and a temperature range of -60 to 450 degrees Fahrenheit. It states suitability for liquids and gases, including water, oil, air, gas, and light acids or alkalis.
Best for: Buyers whose piping uses 1-inch male threaded connections and who want a listed SS316 construction. It was selected for its stated material, connection, and operating details.
Limitation: The listed size is 1 inch, so it will not directly meet an 8-inch requirement.
Dsmpipeft 3/4-Inch SS316 Valve
The Dsmpipeft is a 3/4-inch swing check valve with a stainless steel 316 body, disc, and nut. It has female-to-female NPT connections and is listed at 200 WOG/PN16. Its stated temperature range is -60 to 450 degrees Fahrenheit, and the product description names water, oil, air, gas, and light acids or alkalis as possible media.
Best for: Buyers needing a smaller threaded SS316 valve with stated pressure and temperature information. It was selected as a clearly specified option for 3/4-inch pipe connections.
Limitation: Check that the media and operating conditions match the product details and your system requirements.
Eastman 1-Inch Brass Swing Check Valve
Eastman’s 1-inch IPS brass valve is described as a backflow preventer for water systems. The manufacturer’s listed applications include wells, boiler systems, and potable water installations. Its stated working-pressure description is 125 PSI to 200 WOG.
Best for: Buyers seeking a brass check valve for a water or plumbing application with a 1-inch IPS connection. It was selected for its stated use cases and straightforward brass construction.
Limitation: The listing does not provide an 8-inch option. Verify connection details and suitability for the specific installation.
SYWUWV 3/4-Inch Brass Check Valve
This 3/4-inch NPT brass valve is described as a horizontal check valve that permits flow in one direction and helps prevent backflow. The listing states that its inner wall is polished and describes the body as wear-resistant. It names oil, water, gas, and air among the intended media.
Best for: Buyers looking for a 3/4-inch brass option for horizontal piping where the listed NPT connection fits. It was selected because its product description explicitly identifies horizontal use and one-way flow.
Limitation: The listing does not provide a working-pressure rating in the supplied details. Confirm pressure limits and installation orientation before use.
Buying Guide: How To Choose A Swing Check Valve
Do you need an 8-inch valve?
Check the nominal pipe size before comparing models. The products listed here range from 3/4 inch to 2 inches; none is identified as 8 inches. If your system requires an 8-inch valve, look for a product explicitly listed in that size and verify its end-to-end dimensions and connection standard.
Which connection type matches your piping?
Threaded valves connect to compatible threaded pipe or fittings, while flanged valves bolt to matching flanges. The Anix listing specifies a raised-face flange connection. The Megairon and Dsmpipeft list female NPT ports, and the SYWUWV lists NPT. Match the connection type and size exactly rather than relying on approximate measurements.
Which material should you compare?
Choose based on the fluid, operating conditions, and system requirements. The listed choices include brass, SS316 stainless steel, and cast carbon steel. Product descriptions provide different amounts of pressure, temperature, and media information, so compare those details with your application. Do not assume that a valve is suitable for a fluid or condition unless its specifications support that use.
What else should you verify?
- Confirm flow direction and whether the product’s specified installation orientation suits the piping layout.
- Check the pressure and temperature ratings against actual operating conditions.
- Verify pipe size, thread standard, flange dimensions, and required seat or body material.
- For water systems, confirm suitability for the intended use rather than relying only on a general plumbing description.
Frequently Asked Questions
Is any listed product an 8-inch swing check valve?
No. The largest listed product is the 2-inch Anix flanged valve. The supplied products do not include an 8-inch model.
What does a swing check valve do?
A swing check valve allows flow in one direction and uses a moving disc to help prevent reverse flow. Confirm the specific product’s orientation and application requirements.
Are threaded and flanged valves interchangeable?
No. Threaded and flanged ends use different connection methods. Select the type that matches the existing pipework or approved installation design.
Which listed valve is made of SS316?
The 1-inch Megairon and 3/4-inch Dsmpipeft products list SS316 bodies and discs. Compare their sizes and connection requirements before choosing.