Suttner Thermal Relief 3/8" MPT 140 Deg.
Suttner Thermal Relief 3/8" MPT 140 Deg.
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- Item# 4963
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Suttner Thermal Relief Valve 3/8" MPT - Dumps Hot Water Before It Cooks Your Pump
This Suttner thermal relief valve threads into your pump with a 3/8" MPT connection and opens at 140 degrees. When the machine sits in bypass with the trigger off, the water recirculating in the pump keeps getting hotter. This valve dumps that hot water and pulls in cool water before the heat gets to your seals. In stock at Sun Brite Supply in Gaithersburg, MD.
Cooked pump seals are one of the most common failures we see, and most of the time it happens while the rig idles in bypass between spray downs. A thermal relief valve is cheap insurance compared to a pump rebuild. Suttner has earned a reputation among working contractors for building equipment that holds up under daily use. Match the 3/8" MPT thread to your pump port and you're set.
Where Contractors Use This Thermal Relief Valve
Application and Compatibility
This component integrates into standard commercial pressure washing systems using industry-standard connections. Verify the specifications listed below against your existing equipment before ordering. Thread sizes, pressure ratings, and flow capacities must match your system for safe, leak-free operation. If you're not sure about compatibility, call (301) 519-9274 - we match parts to machines every day.
Contractor-Grade Quality
There's a real difference between professional equipment and consumer-grade alternatives sold at hardware stores. Consumer parts are built to a price point - they work fine for the homeowner who pressure washes their deck once a year. But put those same parts on a commercial rig running 8 hours a day, 5 days a week, and they fail fast. This pressure washer part is built for that daily grind. The materials, tolerances, and construction are designed for thousands of hours of commercial operation. That's why contractors come to Sun Brite Supply instead of buying online from unknown vendors - we carry the brands and specs that working professionals trust.
Installation and Setup
Verify Compatibility
Check the specifications against your existing equipment. Thread sizes, pressure ratings, and flow capacities must match for safe operation.
Install According to Specs
Follow the manufacturer's installation guidelines. Use appropriate thread sealant on pipe connections. Don't overtighten fittings.
Test Under Pressure
After installation, test at low pressure first. Check all connections for leaks before running at full operating pressure.
Compatible With
Specifications
| Brand | Suttner |
| Product Type | Thermal Relief Valve |
| Connection Size | 3/8" |
| Thread Type | MPT |
| Ships From | Gaithersburg, MD |
Maintenance and Troubleshooting
Inspect this component during your regular maintenance routine. Check for wear, leaks, corrosion, and proper operation. Replacing worn parts on schedule prevents mid-job failures that cost you time and money.
When to Replace vs. Repair
If this pressure washer part shows signs of wear but is still functional, a rebuild kit or replacement seals may extend its service life at a fraction of the full replacement cost. However, if you see cracks, cross-threading, severe corrosion, or complete failure under pressure, replacement is the safer and more economical choice. Call (301) 519-9274 and we'll help you decide. Always follow OSHA equipment safety standards when working with high-pressure equipment.
Frequently Asked Questions
Need Help Choosing the Right Part?
30+ years of industry experience. We match parts to machines every day.
Why Buy From Sun Brite Supply?
Sun Brite Supply has served pressure washing contractors from our Gaithersburg, MD location since 2011. We stock the professional-grade parts and equipment you won't find at big box stores. Every in-stock order ships within 24 hours. Local customers can pick up the same day. Call (301) 519-9274 and talk to someone who knows this equipment - not a call center.