Conbraco 17-402-04 Relief Valve

The Conbraco 17-402-04 Relief Valve is a high-capacity, pressure-only safety device engineered specifically for hot water heating boilers and hydronic systems. Featuring a rugged cast bronze body and a 3/4-inch MNPT inlet x 3/4-inch FNPT outlet, this ASME Section IV certified valve is factory-set to 150 PSI. It provides critical protection against thermal expansion, supporting systems with a discharge capacity up to 934,000 BTU/HR. Designed for reliability in demanding environments, it incorporates a corrosion-resistant stainless steel spring and a durable silicone seat to ensure positive shut-off and long-term service life. This uni-body bronze relief valve is essential for maintaining the safety of residential and commercial boiler pressure relief applications, fitting seamlessly into tankless water heater or storage tank setups requiring CSA certified performance up to 250°F.

• ASME Section IV Certified: Verified capacity of 934,000 BTU/HR ensures compliance and safety for high-output hot water boilers.
• Corrosion-Resistant Construction: Built with a cast bronze body and stainless steel internal components to withstand aggressive system fluids.
• Superior Sealing: Features a resilient silicone seat for leak-resistant operation and extended maintenance intervals.
• Thermal Protection: Specifically designed to mitigate pressure spikes caused by thermal expansion in plumbing systems and tankless units.
• Installation Ready: Standard 3/4-inch NPT connections (Male x Female) allow for straightforward replacement in existing pipe networks.

• Is the Conbraco 17-402-04 suitable for steam applications? No, this model is a pressure-only relief valve designed for hot water heating and supply systems; it is not for use in steam service.
• What is the maximum operating temperature for this valve? This Apollo RVW17 series valve is rated for a maximum temperature of 250°F (121°C).
• Does this valve include a test lever? Yes, the 17-402-04 comes standard with a top-mounted test lever for manual operational checks.

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Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.