Conbraco 27-401-01 Siphon Loop This unit uses standard White-Rodgers

This unit uses standard White-Rodgers thermostat lock keys

ensuring the unit maintains its rated AFUE performance

the 3/4" MNPT process connection provides a standard

If the vacuum is sufficient but the SPNO switch fails to show continuity across the terminals

this kit simplifies that process by requiring no stem height setting during installation on compatible VB-7xxx valves

Conbraco 27-401-01 Siphon Loop This unit uses standard White-RodgersThe Conbraco 27 401 01 is a standard setting 180 degree steam gauge siphon loop designed to protect sensitive instrumentation from the destructive effects of live steam. Constructed from 1 4 inch heavy gauge seamless brass tubing, this pigtail siphon acts as a thermal barrier by trapping condensate within its loop. This "water seal" prevents high temperature saturated steam from directly entering the Bourdon tube of your boiler pressure gauge or