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2. Drain-waste-vent system - Wikipedia

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

   A drain-waste-vent system (or DWV) is the combination of pipes and plumbing fittings that captures sewage and greywater within a structure and routes it toward a water treatment system. It includes venting to the exterior environment to prevent a vacuum from forming and impeding fixtures such as sinks, showers, and toilets from draining freely ...

3. Flashing (weatherproofing) - Wikipedia

   en.wikipedia.org/wiki/Flashing_(weatherproofing)

   A concealed flashing placed under windows or door thresholds to prevent water from entering a wall at those points. Used to waterproof pipes, supports, cables, and all roof protrusions. Stainless steel penetration flashings have proven to be the longest lasting and most reliable roof flashing type.

4. Chimney - Wikipedia

   en.wikipedia.org/wiki/Chimney

   Sometimes weep holes are placed at the bottom of the chimney to drain out collected water. A chimney cowl or wind directional cap is a helmet-shaped chimney cap that rotates to align with the wind and prevent a downdraft of smoke and wind down the chimney. An H-style cap is a chimney top constructed from chimney pipes shaped like the letter H ...

5. Cowl (chimney) - Wikipedia

   en.wikipedia.org/wiki/Cowl_(chimney)

   An H-style cap (cowl) is a chimney top constructed from chimney pipes shaped like the letter H. It is an age-old method to regulate draft in situations where prevailing winds or turbulence cause downdraft and back-puffing.

6. French drain - Wikipedia

   en.wikipedia.org/wiki/French_drain

   French drain. A French drain[1] (also known by other names including trench drain, blind drain, [1] rubble drain, [1] and rock drain[1]) is a trench filled with gravel or rock, or both, with or without a perforated pipe that redirects surface water and groundwater away from an area. The perforated pipe is called a weeping tile (also called a ...

7. Composite repair - Wikipedia

   en.wikipedia.org/wiki/Composite_repair

   Composite repairs are performed on damaged laminate structures, fibre reinforced composites and other composite materials. The bonded composite repair reduces stresses in the damaged region and prevents cracks from opening or growing. Composite materials are used in a wide range of applications in aerospace, marine, automotive, surface ...