How do you measure the depth of a drain or catch basin?

Site Prep
Plumbing
One-Handed Use

Invert depth on a drain or catch basin is the one measurement where a hook has nothing whatsoever to hold, so it usually gets estimated or done with a stick. The T1M Utility's tip has enough holding force to stand the blade on the bottom while you read the depth at the top. The figure goes on the record instead of being guessed for the report.

Why depth measurements get guessed

Nothing at the bottom for a hook to hold
The tip holds the blade standing
Read the depth from the top
One hand, no helper, no stick
The figure goes on the record

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A vertical drop into a pipe is the one measurement where a tape hook has nothing at all to hold. A tip with real holding force lets you set the blade on the bottom and let it stand while you read the depth at the top, instead of feeding blade down a hole and hoping it stayed put.