Bathtub and Shower Drains

A shower drain is made of several parts. Beneath the removable strainer cover in the shower floor, the drain leads to an under-floor trap that connects to a drain line and the waste/vent stack.

Tub drains have two legs, one to the main drain opening and the other to the overflow drain opening. To close and open the drain, two different assemblies are common: pop-up and plunger-type. Both are operated by a trip lever at the overflow drain.

With a pop-up drain, linkage forces the drain stopper up or down by way of a rocker arm. With the plunger-type, a hollow brass plunger slides up and down inside the drain assembly to seal the drain opening.

--Don Vandervort
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