Description
Brass truck water shutoff valve with a 3/4″ hose barb on one end and a 1/2″ male NPT pipe thread on the other. The Midland 46456 is used on heater hose and coolant line plumbing in heavy-duty trucks, trailers, and mobile equipment to manually open or close flow to the cab heater core or auxiliary water circuits.
Specifications
| Manufacturer | Midland Industries |
|---|---|
| Part Number | 46456 |
| Part Type | Manual Water Shutoff Valve (Truck Valve) |
| Material | Brass |
| End 1 | 3/4 in. Hose Barb |
| End 2 | 1/2 in. Male NPT Pipe |
| Service | Water, coolant, oil (heavy-duty truck and mobile equipment) |
Applications
Common heavy-duty truck and equipment uses include:
- Cab heater hose isolation (turn off coolant flow to the heater core in summer)
- Auxiliary heater and bunk-heater plumbing
- Coolant tank or expansion-tank fill / drain branches
- General mobile-equipment water and oil shutoff service
Use thread sealant rated for engine coolant on the male pipe thread, and confirm the hose barb size matches the existing heater hose ID before ordering.









