4 in. Brass Ball Valve, 400 WOG Full Port | 940181
4 in. Brass Ball Valve, 400 WOG Full Port | 940181
✓ In stock at our distribution warehouses — typically ships within 1–2 business days.
Flat-rate shipping, nationwide- Orders under $100: $9.95
- $100 – $499.99: $14.95
- Orders $500+: quoted — real freight for your order, not a flat guess
Volume order or crossing a competitor part number? Request a quote — usually answered the same business day.
The 4 in. forged brass ball valve (part 940181) delivers full-port, quarter-turn shutoff rated 400 psi WOG non-shock and 150 psi WSP saturated steam. Female NPT threads per ANSI B1.20.1, hard chrome-plated solid ball, virgin PTFE seats, and a bottom-loaded blow-out-proof stem. UL 842/258/125 listed and FM approved for 5 psig gas — each valve individually tested.
Technical Specifications
| Manufacturer Part Number (MPN) | 940181 |
| Nominal Size | 4 in. |
| Valve Type | Full-port ball valve, forged brass |
| End Connections | Female NPT × Female NPT, ANSI B1.20.1 |
| Pressure Rating | 400 psi WOG non-shock |
| Steam Rating | 150 psi WSP saturated steam |
| Temperature Range | −22°F to 302°F (−30°C to 150°C) |
| Listings | UL 842, UL 258, UL 125; FM approved (5 psig gas) |
| Port | Full port (full bore) |
| Operation | Quarter-turn lever, vinyl-insulated handle |
Dimensions
| Bore Diameter | 3.89" |
| End-to-End Length | 7.38" |
| Height (center to top) | 5.86" |
| Handle Length | 9.00" |
| Weight | 12.12 lb |
Materials of Construction
| Body | Forged Brass |
| Ball | Brass, hard chromium plated |
| Stem | Brass, bottom-loaded, blow-out-proof, adjustable packing gland |
| Seats, Stem Packing & Thrust Washer | Virgin PTFE |
| Handle | Plated carbon steel, yellow vinyl insulator |
Performance & Testing
- Full-port bore — minimal pressure drop
- Each valve individually pressure tested
- Suitable for the full range of liquids and gases, including gasoline and diesel
- Blow-out-proof stem with adjustable packing gland — field-serviceable seal
- Deep threads for better connections
- Not lead-free — for potable water supply lines, choose a lead-free certified valve (see Lead-Free Valves in our Valves menu)
Other Sizes in This Series
Forged Brass Full Port Ball Valve, 600 WOG (1/4"–2") / 400 WOG (3"–4"), Female NPT. Jump to another size or add it straight to your cart:
| Size | Part # | Price | Cart |
| 1/4 in. | 940171 | $7.99 | Add to cart |
| 3/8 in. | 940172 | $7.99 | Add to cart |
| 1/2 in. | 940173 | $8.99 | Add to cart |
| 3/4 in. | 940174 | $13.99 | Add to cart |
| 1 in. | 940175 | $20.99 | Add to cart |
| 1-1/4 in. | 940176 | $29.99 | Add to cart |
| 1-1/2 in. | 940177 | $44.99 | Add to cart |
| 2 in. | 940178 | $69.99 | Add to cart |
| 3 in. | 940180 | $187.99 | Add to cart |
| 4 in. (this page) | 940181 | $327.99 | — |
Typical Applications
This 4 in. full-port brass valve suits water distribution, compressed air, oil and gas lines, fuel transfer (gasoline/diesel), HVAC, and general industrial shutoff. Not for potable water supply (not lead-free).
Cross-References & Interchange
Replacing another brand's 4 in. 400 WOG brass ball valve? Match nominal size, end connections, and WOG rating for a direct fit — or send us your part number and we will confirm the interchange.
Availability
In stock — ships direct from the manufacturer, typically 1–3 business days.