Plumbing

Getting a snapped-off PVC pipe end out of its fitting without cutting the joint apart.

Rotating the trap assembly on its wall stub so the trapped water pours down the drain line instead of into the cabinet.

Using a rubber drain-pipe coupling as a full-surface grip to turn out a seized shower cartridge that a wrench can't budge.

Descaling a tankless water heater with an annual vinegar flush.

Keeping under-sink drain slip joints from loosening and weeping.

Getting tight gaskets, O-rings, and seals onto a pipe or shaft.