Sometimes you need to raise commercial kitchen equipment — such as a pot sink, prep table or dishwashing unit — higher than the adjustable legs allow in order to diagnose a problem or complete a repair. To make them taller, I make cups from 1 1/4-in. or 1 1/2-in. PVC pipe. I glue the test cap on one end and fill with concrete or plaster to the amount needed to increase height. Cut the PVC 1-in. longer to make the cup, and it will not pull off the leg.