| Product Line | Brakes |
| Category Name | Air Brake Valves |
| Part Type | Relay Valve |
| Model | R-14H |
| OEM Part Number | 104574 |
| Application Type | Semi-Trucks, Heavy Duty Trucks |
| Balance Port Size | 1/8-27 NPT |
| Compatible Repair Kit Part Number | F224642 |
| Delivery Port Qty | 2 |
| Delivery Port Size | 1/2-14 NPT |
| Exhaust Port Size | Dust Shield |
| Mounting Hole Qty | 2 |
| Mounting Hole Size | 0.433 in. |
| Service Port Size | 1/4-18 NPT |
| Supply Port Size | 1/2-14 NPT |
| Supply Port Qty | 2 |
| Universal Mounting Bracket Included | Yes |
| Material | Die-cast Aluminum |
| Valve Body Configuration | 2 SUP / 2 DEL (H) |
| Control Port Orientation | 270 deg. |
| Crack Pressure | 4.0 psi |
| Maximum Operating Temperature | 200 deg. F (93 deg. C) |
| Minimum Operating Temperature | -40 deg. F (-40 deg. C) |
| Net Weight | 3.10 lb. |
| Cross References | 104574, 104574BXW, 104574R, 25166438, 745-104574, 745104574, BW104574, EM36840, K104574, LRV-3684, LRV3684, R955104574 |
| Intended Application | - For air brake systems of trucks, trailers and buses.
- Ideal for systems with spring brakes, where the anti-compounding function is crucial to avoid double brake application problems.
- Improves the efficiency of the brake system in heavy-duty and commercial vehicles.
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