Product Information
GB312 Pressure Switch (505.91570)
Please note: Hydrowest Products Ltd. is a wholesale distributor and sells exclusively to licensed contractors and trade professionals.
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.
Bosch GB312 Pressure Switch (505.91570), part number 8718577734, is a direct-fit replacement pressure switch for the GB312 series boilers, intended to restore the unit’s pressure‑sensing and safety interlock functions. Designed for serviceability in commercial and residential installations, it verifies correct flue/combustion‑air conditions before allowing burner operation and offers a compact form factor that simplifies swap‑out and routine maintenance. (bosch-homecomfort.com)
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