The best time to plant your corn seeds is when the soil temperature reaches an average of 50 degrees Fahrenheit. You can determine the average ground temperature in your garden using a soil thermometer -- available at most garden stores.
Vents are a major component in a home's drainage system. Venting allows water to pass out of the drains easily. Today, houses are vented through the roof. Roof flashing, made from heavy grade rubber, lead or sheet metal holds the vent pipe in place. Another thing to consider is pitch.
To allow equalization of air pressure throughout the waste plumbing system, we attach vent pipes to the tops of all the waste and drain lines and run them up through the roof. This allows air to escape up the vent pipes and through the roof. It also allows air to be drawn down the vent pipes from outside.