For steam and hot water boilers with cold water feed

Continuous maintenance of minimum safe water level, independent of electrical service

Proportional feed action

Quick hook-up fittings provided

Quick-change replaceable cartridge valve and strainer

Model 47 can be field upgraded with a No. 2 switch to add low water Cut Off function

Flo-Control Valves are Used for Preventing Gravity Flow in Forced Water Systems and to Permit Summer-Winter Operation of Indirect Water Heater

Removable Top Cap Allows Easy Cleaning and Service without Removing Pipe Connections

Manual Operating Position for Vertical Lift Disc to Permit Gravity Circulation

Asbestos-Free Packing and Gasket

Flo-Control Valves are Used for Preventing Gravity Flow in Forced Water Systems and to Permit Summer-Winter Operation of Indirect Water Heater

Removable Top Cap Allows Easy Cleaning and Service without Removing Pipe Connections

Manual Operating Position for Vertical Lift Disc to Permit Gravity Circulation

Asbestos-Free Packing and Gasket

Flo-Control Valves are Used for Preventing Gravity Flow in Forced Water Systems and to Permit Summer-Winter Operation of Indirect Water Heater

Removable Top Cap Allows Easy Cleaning and Service without Removing Pipe Connections

Manual Operating Position for Vertical Lift Disc to Permit Gravity Circulation

Asbestos-Free Packing and Gasket

Flo-Control Valves are Used for Preventing Gravity Flow in Forced Water Systems and to Permit Summer-Winter Operation of Indirect Water Heater

Removable Top Cap Allows Easy Cleaning and Service without Removing Pipe Connections

Manual Operating Position for Vertical Lift Disc to Permit Gravity Circulation

Asbestos-Free Packing and Gasket

Rust Resistant Heavy Duty Handle with Vinyl Grip

Lead-Free