1-1/4 in. Lead-Free Brass Swing Check Valve, Female NPT
1-1/4 in. Lead-Free Brass Swing Check Valve, Female NPT
Backordered at the manufacturer — available to order; shipping date is not currently confirmed.
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The 1-1/4 in. Lead-Free Brass Swing Check Valve (940355LF) is a lead-free brass swing check valve. Female NPT connections for threaded installation. Midland identifies this product as lead-free. Apex has not independently verified an NSF 372 or NSF 61 listing for this SKU. Confirm current certification documentation before specifying it for regulated or potable-water service.
Technical Specifications
| Specification | Value |
|---|---|
| Manufacturer Part Number (MPN) | 940355LF |
| Nominal Size | 1-1/4 in. |
| Valve Type | Swing check valve, lead-free brass |
| End Connections | Female NPT x Female NPT |
| Body Material | Lead-Free Brass (≤0.25% Pb) |
| Pressure Rating | 200 psi WOG |
| Temperature Range | Full manufacturer spec sheet available on request |
Key Features
- Lead-free brass body — Midland-designated lead-free (≤0.25% lead by weighted average)
- Swing check design — full port, low headloss when open
- Female NPT connections for straightforward threaded installation
Common Applications
Used to prevent reverse flow in commercial and industrial piping. For regulated or potable-water service, confirm the specific SKU's current lead-free certification documentation before specifying it.
Technical Resources
- How to Choose the Right Valve for Your Application
- Check Valve Types Explained (Swing vs. Spring vs. Wafer)
Other Sizes in This Series
The Lead-Free Brass Swing Check Valve (FIP x FIP) is available in the following sizes:
| Size | Part # |
|---|---|
| 1/2 in. | 940352LF |
| 3/4 in. | 940353LF |
| 1 in. | 940354LF |
| 1-1/4 in. (this page) | 940355LF |
| 1-1/2 in. | 940356LF |
| 2 in. | 940357LF |
| 2-1/2 in. | 940358LF |
| 3 in. | 940359LF |
| 4 in. | 940360LF |
Need copper (sweat) connections instead of threaded? See the Copper x Copper Lead-Free Swing Check series.
Expert Guides for This Product
- Check Valve Orientation & Installation — flow direction and mounting rules
- Check Valve Sizing Guide — why line size isn't valve size
- Slamming & Water Hammer — causes and fixes
- Check Valve Leaking? — diagnose and fix it
- Check Valve Chattering — the sizing problem nobody checks
- Buna vs. Viton Seats — which elastomer fits your media
Selection reference: swing check valve guide — compare materials, sizes, and installation considerations.