Drainage Review 6

Trap seal loss is almost completely eliminated by installing a fixture vent.

• False

• True

___ of sanitary drainage systems provides a supply of fresh air containing oxygen, which helps to retard material corrosion.

 

In the UPC, a vent stack is required for drainage stacks of 10 or more stories.

• True

• False

A ___ vent is a vent that does not carry water or waterborne wastes.

• Loop

• Dry

• Combination

• Circuit

 The UPC requires that the common fitting connecting two trap arms must be a(n) ____________________.

 A(n) ____________________ can connect several vent stacks and stack vents and then extend through the roof to atmosphere.