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Taco®
Taco® 221-6 221 Horizontal Hydronic Flo-Chek Valve, 1-1/4 in Nominal, NPT End Style, 125 psi Pressure, Cast Iron Body
Taco®

Taco® 221-6 221 Horizontal Hydronic Flo-Chek Valve, 1-1/4 in Nominal, NPT End Style, 125 psi Pressure, Cast Iron Body

BrandTaco®
MFR Part No221-6
TSCO Part Number427706

Warranty Length

  • 1 Year

Features

  • When the room thermostat is satisfied and the circulator is stopped
  • The flo-cheks close immediately, preventing gravity circulation
  • Gravity circulation of water is induced by the difference in specific weight or density of the hot water in the vertical supply pipe and the cold water in the vertical return pipe
  • The lighter hot supply side water, which naturally wants to rise, is drawn up and around the system by the pulling down effect of the heavier cold water in the vertical return pipe
  • The amount of gravity circulation is dependent on the height of the system and the differential between the hot and cold temperatures
  • In systems with multiple zones, ghost flow may occur if a Flo-Chek is not installed on each zone
  • Ghost flow is induced when a circulator on one zone is running but is still able to bypass water through a zone that is not calling, due to a differential in piping resistance between the two zones
  • 125 PSI Maximum Operating Pressure 862 kPa
  • 277 degrees F Maximum Operating Temperature 136 degrees C
  • Prevents gravity circulation in a forced water heating system
  • For multi circulator systems Flo-Cheks allow flow only into zones calling for heat
  • Automatically Opens When Circulator Starts Running Cast Iron, Universal Body or Bronze Sweat-In Configuration