A

.A.

ABS - Acrylonitrile Butadiene Styrene - A black composit plastic used to make plumbing pipe and fittings. There is cellcore ABS. Used a lot, out west.

Access Panel - A removable panel in a wall or ceiling that permits repair or replacement of concealed items.

air gap - the best back flow protection

Augar - A flexable metal cable fished into traps and drains lines to dislodge obstructions.