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2. Buchan trap - Wikipedia

   en.wikipedia.org/wiki/Buchan_trap

   The trap is made from fireclay [1] and uses a water seal to prevent air passing from the sewer to the pipe. Waste flows from the house through a U-bend in the trap. This means that there is always water in the pipe preventing the passage of anything from the other direction. The device is a large clay U-bend with an air-inlet/access point on ...

3. Air lock - Wikipedia

   en.wikipedia.org/wiki/Air_lock

   If the ground in which the pipe is laid has high points – such as Hi1, 2 etc. and low points between them such as Lo1, 2 etc., then if the pipe is filled from the top, and was empty, the pipe fills OK as far as Hi1. If the water flow velocity is below the rising velocity of air bubbles, then water trickles down to the low point Lo2 and traps ...

4. Drain-waste-vent system - Wikipedia

   en.wikipedia.org/wiki/Drain-waste-vent_system

   A sewer pipe is normally at neutral air pressure compared to the surrounding atmosphere.When a column of waste water flows through a pipe, it compresses air ahead of it in the system, creating a positive pressure that must be released so it does not push back on the waste stream and downstream traps, slow drainage, and induce potential clogs.

5. Trap (plumbing) - Wikipedia

   en.wikipedia.org/wiki/Trap_(plumbing)

   Maintaining the water seal is critical to trap operation; traps might dry out, and poor venting can suction or blow water out of the traps. This is usually avoided by venting the drain pipes downstream of the trap; by being vented to the atmosphere outside the building, the drain lines never operate at a pressure much higher or lower than ...

6. Here are steps to take to keep your water pipes safe during ...

   www.aol.com/steps-keep-water-pipes-safe...

   Here are some tips to keep your home safe: Locate and label your water main shut-off valve: Identify the water main shut-off valve and ensure all household members know its location.

7. Prepare for the coldest Arctic blast: How to keep your pipes ...

   www.aol.com/prepare-coldest-artic-blast-keep...

   Pipes exposed to "severe cold" including outdoor hose bibs, swimming pool supply lines, and water sprinkler lines. (If you have swimming pool or sprinkler supply lines, they needed drained too.)