Premise: How to use a water level<br>Use 50 to 100 feet (15 to 30 m) of tubing with a 5.16 in (13. 1 cm) diameter. A water level is easy to make at home with plastic tubing and a few other supplies. If you plan to level items that are a far distance from each other, you may opt for a longer tube.
Hypothesis: The tubing diameter must be 5.16 in