Onsite Arithmetic: Setting Alarm Floats

Test your septic knowledge and figure out where this high-water alarm float should be set
Onsite Arithmetic: Setting Alarm Floats

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1. If a pump tank has the following dimensions — 42 inches by 60 inches by 58 inches deep — what are the gallons per inch? What is the volume of the tank?

2. If an off float is set 52 inches from a surface reference point and the on float is activated at a depth of 46 inches, what is the dose volume?

3. From the reference point, where should the high-water alarm float be set?

4. If there is 6 inches of sludge in the tank, what does this tell us?

5. If we factor in an 18-inch depth to cover the pump, is the tank still large enough?

Answers are posted here.

Here’s a review of Simple Septic Math and our Pointers for Onsite Arithmetic

This article is part of a series of practice problems for installers:


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