Grundfos 00519850 Valve Set 319847-401 Dual Stage Control: Provides two-stage

Dual Stage Control: Provides two-stage gas furnace valve modulation for enhanced fuel efficiency and consistent heat output

delivering a steady 70 watts of heat to counteract ambient cold-soak

the unit features an integrated sun shield

it is specifically configured for post-mounting applications or integration into custom linkage assemblies

If power is lost but the water level is still above the probe when power returns

Grundfos 00519850 Valve Set 319847-401 Dual Stage Control: Provides two-stageThe Grundfos 00519850 Valve Set is a professional grade 1 2 inch bronze isolation valve kit designed for seamless integration with Grundfos UP and UPS series circulator pumps. Engineered for high temperature hydronic heating and potable water systems, these union isolation valves allow for rapid pump servicing or replacement without the need to drain the entire loop. The sweat connection design provides a secure, leak free interface, while the heavy