Low Flush Toilet

A toilet that uses 1.6 gallons per flush (GPF) or less in accordance with federal plumbing standards. High efficiency toilets that use up to 1.28 GPF.  Older toilets may use 3.5, 5, or even up to 7 gallons of water with every flush.

Vitreous clay

A clay with a glazed surface that will not absorb water. Vitreous clay tile liners are usually installed in fireplace flues of site fabricated fireplaces.

Vulnerability

A measure of the possibility of something occurring

Wainscot

The wooden paneling of the lower part of an interior wall up to the dado height in a room.

Walkway

A path intended for one to walk on and in many instances walkway means a paved path that may be paved with concrete