4 in. Brass Ball Valve, 400 WOG Full Port
4 in. Brass Ball Valve, 400 WOG Full Port
Sizes in This Series
Brass full-port ball valves, 600 WOG (1/4–2 in.); 400 WOG for 3 and 4 in. sizes. Jump to another size or add it straight to your cart:
| Size | Part # | Price | Cart |
| 1/4 in. | 940171 | $9.99 | Add to cart |
| 3/8 in. | 940172 | $9.99 | Add to cart |
| 1/2 in. | 940173 | $11.99 | Add to cart |
| 3/4 in. | 940174 | $16.99 | Add to cart |
| 1 in. | 940175 | $25.99 | Add to cart |
| 1-1/4 in. | 940176 | $37.99 | Add to cart |
| 1-1/2 in. | 940177 | $56.99 | Add to cart |
| 2 in. | 940178 | $87.99 | Add to cart |
| 3 in. (400 WOG) | 940180 | $229.99 | Add to cart |
| 4 in. (400 WOG) (this page) | 940181 | $399.99 | — |
Overview
Midland Industries MPN 940181 is a 4 in. full-port brass ball valve with female NPT x female NPT (FPT x FPT) connections. The forged-brass body carries a chrome-plated brass ball on a PTFE seat and seal, rated to 400 psi WOG. A quarter-turn lever handle gives quick on/off shutoff for water, oil, and gas service lines.
Technical Specifications
| Manufacturer | Midland Industries |
| Part Number (MPN) | 940181 |
| Nominal Size | 4 in. |
| End Connections | FPT x FPT (female NPT) |
| Port Type | Full Port |
| Pressure Rating | 400 psi WOG |
| Temperature Range | -22°F to 302°F |
| Body Material | Forged Brass |
| Ball Material | Chrome-Plated Brass |
| Stem Material | Brass |
| Seat Material | PTFE |
| Seal Material | PTFE |
| Operator | 1/4-Turn Lever Handle |
| Lead Content | Contains Lead |
Materials of Construction
| Body | Forged Brass |
| Ball | Chrome-Plated Brass |
| Stem | Brass |
| Seat | PTFE |
| Seal | PTFE |
| Handle | Steel with Vinyl Insulator |
Typical Applications
Transmission mains, large industrial process piping, and high-flow cooling water systems. Rated to 400 psi WOG at this bore size; confirm rating requirements before installation.
Cross-Reference and Interchange
Replacing a competitor valve? Match nominal size (4 in.), end connections (FPT x FPT), and 400 WOG rating for a direct fit. Send us the part number you are crossing from and we will confirm the interchange.
Sizing and Installation Resources
- Ball Valve Materials Guide
- Ball Valve Sizing & Cv Reference
- Pressure & Temperature Ratings Chart
- NPT Thread Tightening Turns Past Hand Tight
- Teflon Tape vs. Pipe Dope
Frequently Asked Questions
Is this a full-port valve?
Yes. The bore matches the nominal pipe size, so flow and Cv are maximized.
What handle does it use?
A standard quarter-turn lever handle.
Can I use it on natural gas?
The 400 WOG forged-brass body is widely used on gas service lines; always confirm against your local code and the appliance listing.
What thread type are the ends?
Both ends are female NPT (4-8).
California Proposition 65 Warning: This product can expose you to chemicals including Lead, which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.