A clear PVC tube installed in the suction line of the pump used to precisely measure the pump output at different pump dial settings and operating conditions. Manufactured by Griffco Valve Inc. The calibration column should have a capacity of at least the maximum volume of the pump for one minute of pump operation.

Capacity – ml Madden Part No.
100 IN500A
200 IN500B
500 IN500C
1,000 IN500D
2,000 IN500E
4,000 IN500F
10,000 IN500G
20,000 IN500H

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