Product Information
Bosch SSB Pressure Differential Switch
Compatible with 9 equipment models
- SSB-1000 SSB-1000 Boiler
- SSB-1000TL SSB-1000TL Boiler
- SSB-1000TL-V2 SSB 1000TL V2 Boiler
- SSB-1000-V2 SSB 1000 V2 Boiler
- SSB-255 SSB-255 Boiler
- SSB-399 SSB-399 Boiler
- SSB-512 SSB-512 Boiler
- SSB-800 SSB-800 Boiler
- SSB-800-V2 SSB 800 V2 Boiler
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Fast Shipping
In-stock orders ship within 1 business day to anywhere in Canada.
Code-Compliant
All products meet Canadian HVAC and gas code standards.
Wholesale Pricing
Trade pricing for licensed contractors. 40+ years in the industry.
The Bosch SSB pressure differential (flow-proving) switch protects geothermal water-source heat pumps by detecting lack of flow and shutting down the WSHP before hard-lockout faults occur. Specifications include waterless flow detection, adjustable differential range, 1/4" FPT high/low connections, SPST (normally open) switch rated 50W–240 VAC/VDC (3 A), and a durable outer shell for use with Bosch hose kits. I could not find part number 7738004974 on Bosch North America sites; this description is based on Bosch’s Flow Proving Switch product information. (bosch-homecomfort.com)
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