Description
The Bell & Gossett 110135 is a heavy-duty relief valve engineered for reliable overpressure protection in hydronic heating and hot water systems. With a 1″ connection size, a factory-set pressure of 125 PSI, and a rated capacity of 3,735,000 Btuh, this valve is built to handle the demands of commercial and large residential boiler applications.
Bell & Gossett is a trusted name in hydronic system components, and this relief valve reflects the brand’s commitment to precision engineering and long-term performance. When system pressure exceeds the 125 PSI set point, the valve opens automatically to safely discharge excess pressure, protecting boilers, piping, and connected equipment from damage.
Key Features
- 1″ connection size for straightforward installation on standard hydronic piping
- 125 PSI factory-set relief pressure for precise, consistent overpressure protection
- 3,735,000 Btuh rated discharge capacity — suitable for high-output commercial boiler systems
- Designed for hydronic heating and hot water system applications
- Automatic pressure relief operation protects boilers, heat exchangers, and system components
- Bell & Gossett quality construction for dependable, long-service-life performance
Specifications
- Brand: Bell & Gossett
- SKU / Part Number: 110135
- Connection Size: 1″
- Set Pressure: 125 PSI (125#)
- Rated Capacity: 3,735,000 Btuh
- Valve Type: Relief Valve
- Application: Hydronic heating and hot water systems
Application
Ideal for commercial boiler rooms, large-scale hydronic heating systems, and institutional hot water applications where high-capacity pressure relief is required. The Bell & Gossett 110135 provides the safety margin needed to keep systems operating within design parameters and in compliance with pressure vessel safety requirements.







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