R400S-1/2 MAXITROL 1/2″ GAS PRESSURE REGULATOR – 5 PSI MAX INLET
Product Overview
The Maxitrol R400S-1/2 Gas Pressure Regulator is a compact, high-capacity regulator designed for main burner and pilot load applications in residential and light commercial gas systems. Featuring a double diaphragm balanced valve design, this regulator maintains steady and accurate outlet pressure even when inlet pressures fluctuate.
Engineered for durability and consistent performance, the R400S-1/2 delivers precise pressure control while maintaining a compact footprint, making it ideal for tight installation spaces.
✅ Key Features
✅ 1/2″ gas pressure regulator for burner and pilot applications
✅ Double diaphragm balanced valve design for stable outlet pressure
✅ Maintains accurate regulation with varying inlet pressures
✅ Compact size with high flow capacity
✅ Molded balancing diaphragm minimizes inlet pressure influence
✅ Suitable for residential and light commercial gas systems
📋 Specifications Table
| Specification | Details |
|---|
| Model |
R400S-1/2 |
| Manufacturer |
Maxitrol |
| Connection Size |
1/2″ |
| Spring Range |
3″ – 6″ W.C. |
| Maximum Inlet Pressure |
5 PSI |
| Maximum Capacity |
300,000 BTU |
| Application |
Main Burner & Pilot Load |
| Regulator Series |
R / RS Series |
🚨 Common Symptoms This Part Fixes
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Inconsistent burner flame
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Fluctuating gas pressure
-
Poor ignition or pilot instability
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Burner over-firing or under-firing
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Pressure drop under load
❓ Frequently Asked Questions (FAQ)
Q: What applications is the R400S-1/2 designed for?
A: It is intended for use with both main burner and pilot load applications.
Q: What is the maximum inlet pressure?
A: The regulator supports up to 5 PSI maximum inlet pressure.
Q: What outlet pressure range does this regulator support?
A: It has a spring range of 3″ to 6″ water column.
Q: Can this regulator handle fluctuating inlet pressures?
A: Yes. The double diaphragm balanced valve design maintains stable outlet pressure despite inlet pressure changes.
Q: Is this suitable for residential gas appliances?
A: Yes, it is commonly used in residential and light commercial gas-fired equipment.
🛒 Shopping Tips
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Verify gas type and pressure requirements before ordering
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Confirm 1/2″ piping compatibility
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Ensure regulator capacity meets appliance BTU demand
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Install according to local gas codes and manufacturer guidelines
