Miller Edge HRH-375 100ft Hard Air Hose 3/8" ID, 1/8" Wall
The Miller Edge HRH-375 hard rubber air hose is used as a connection hose in pneumatic sensing edge systems. It has a 3/8 in. inside diameter and a 1/8 in. wall and is supplied as a 100 ft. roll.
This hose is commonly used between a pneumatic sensing edge and the switch assembly where a firmer air hose connection is needed. It is not the same as the softer RAH gum rubber hose used in many edge bladders and kit assemblies.
Compatible With
- Miller Edge pneumatic sensing edge systems requiring 3/8 in. hard rubber connection hose
- Miller Edge PS20A pneumatic switch applications when the connection hose size and fittings match
- PS20K500 pneumatic kit family service work where a hard rubber connection hose is required
- Non-monitored pneumatic sensing edges on compatible commercial doors and older gate applications
- Older motorized door systems using air-pressure edge signaling
- Not a direct substitute for RAH-375, RAH-500, RAH-750, SAH-093, or PAH-093 when the original hose material or size is different
Features & Specifications
| Manufacturer | Miller Edge |
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| Product Type | Hard rubber air hose |
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| Part Number | HRH-375 |
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| Application | Pneumatic sensing edge to switch connection hose |
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| Material | Hard rubber |
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| Size | 3/8 in. inside diameter, 1/8 in. wall |
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| Length | 100 ft. |
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| Compatible Switch Family | PS20A style pneumatic switch applications when fittings match |
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| Monitoring Type | Non-monitored system component |
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| Notes | Used as connection hose; match original hose material and diameter |
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Also Known As / Related Part Numbers
- HRH-375
- HRH375
- HRH 375
- Miller Edge hard air hose
- 3/8 in. hard rubber air hose
- PS20A connection hose
- pneumatic edge hard hose
Technician Note
Use HRH-375 where the original system calls for hard rubber connection hose. Substituting a softer hose or a different inside diameter can change how quickly the pressure wave reaches the switch.
Before Ordering Checklist
- Confirm the old connection hose is 3/8 in. inside diameter.
- Confirm the original material is hard rubber, not soft gum rubber, silicone, or polyurethane.
- Check the fitting or plug style at both ends of the connection hose.
- Inspect the switch inlet and hose routing for leaks or kinks.
- Confirm the pneumatic switch and operator input operate correctly after replacement.
Professional Advisory
A pneumatic edge that does not reverse reliably should be removed from service until the hose, switch, and wiring are tested. Do not bypass the edge circuit to keep a door or gate running.
Product Questions & Answers
Q: What is HRH-375 used for?
A: HRH-375 is hard rubber air hose used to connect a pneumatic sensing edge to a compatible pneumatic switch.
Q: Is HRH-375 the same as RAH-375?
A: No. Both may have a 3/8 in. inside diameter, but HRH-375 is hard rubber connection hose and RAH-375 is gum rubber air hose.
Q: Can HRH-375 be used with PS20A?
A: Yes, it may be used in PS20A pneumatic switch installations when the hose size and fittings match the original setup.
Q: Is HRH-375 sold as a complete edge?
A: No. HRH-375 is hose only and requires the proper edge, switch, plugs, fittings, and operator wiring.
Q: What should I check before replacing HRH-375?
A: Check inside diameter, hose material, fitting style, hose route, and whether the pneumatic switch still responds properly.
