Product Information
GB312 Pressure Switch (505.91570)
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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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