Traps will be placed where called for on the plans, or where required by the Engineer.

Traps will be of the "Flap Valve" type, conforming to the standard plans on file in the Engineer's office. They shall be made from cast iron conforming to the requirements of "Cast Iron," Item 27. They shall be free from mechanical defects, and shall operate so as to effect a tight closure.

The price bid per trap shall include furnishing and placing.