Armstrong Pump Chart
Shows volume on HIGH speed
Find 10GPM on the bottom and follow line up to colored line for the pump, then follow the grid line left to find total head it will push (on left).
OR if you know the total head feet, find that on the left and follow the grid to the right where it intercepts with the colored pump line and make sure it meets or exceeds 10GPM where it intercepts (by following that imaginary line to the bottom).
TACO Pump Specs
Find 10GPM on the bottom and follow line up to colored line for the pump, then follow the grid line left to find total max. head it will push (on left).
OR if you know the total head feet, find that on the left and follow the grid to the right where it intercepts with the pump line and make sure it meets or exceeds 10GPM where it intercepts (by following that imaginary line to the bottom).