• Durable design with low maintenance and factory tested
• Unique 7 pass heat exchanger design maximizes heat transfer
• Insulated extended steel jacket
• Cast iron sections with built-in air separator
• Condensing stainless steel secondary heat exchanger with air separator
• Steel base, control module with indicator lights, blower assembly with observation port
• Gas/air manifold assembly, gas/air orifice plate for natural gas and separate plate furnished for conversion to propane
• Stainless steel burner cone and ring assembly, negative regulation gas valve, hot surface ignition system, air pressure switch
• Taco 007 system circulator
• Built-in bypass circulator system with sensor for temperature control, condensate drain trap, sidewall vent termination kit, 40 VA transformer, electrical junction box
• 30 psi ASME relief valve boiler sections and secondary heat exchanger tested for 50 psi working pressure
• Water temperature limit switch, section block temperature limit switch, combination pressure and temperature gauge, drain valve, flue thermal fuse
• 1/2" gas connection
• 3-section
• 1" minimum pipe size

Weil-McLain gv90-4

GV90-4