Step 1
Coat the drain seal with a liquid detergent soap to lubricate it.
Step 2
Place the Mustee drain seal over the drain pipe.
Step 3
Tamp the drain into place. Place the end of your wooden dowel onto the drain seal. Tap the other end of the dowel with a hammer to push it down the drainpipe. Stop when the drain seal is flush with the subfloor.