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2. Drain-waste-vent system - Wikipedia

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

   Drain-waste-vent system

3. Garbage disposal unit - Wikipedia

   en.wikipedia.org/wiki/Garbage_disposal_unit

   Garbage disposal unit

4. Sink strainer - Wikipedia

   en.wikipedia.org/wiki/Sink_strainer

   Sink strainer. In plumbing, a sink strainer is a type of perforated metal sieve or mesh strainer used to strain or filter out solid debris in the water system. Different varieties are used in residential premises and for industrial or commercial applications. Such strainer elements are generally made from stainless steel for corrosion resistance.

5. Psychodidae - Wikipedia

   en.wikipedia.org/wiki/Psychodidae

   Psychodidae - Wikipedia ... Psychodidae

6. Floor drain - Wikipedia

   en.wikipedia.org/wiki/Floor_drain

   Floor drain - Wikipedia ... Floor drain

7. French drain - Wikipedia

   en.wikipedia.org/wiki/French_drain

   French drain - Wikipedia ... French drain

8. Backwashing (water treatment) - Wikipedia

   en.wikipedia.org/wiki/Backwashing_(water_treatment)

   Backwashing is a form of preventive maintenance so that the filter media can be reused. In water treatment plants, backwashing can be an automated process that is run by local programmable logic controllers (PLCs). The backwash cycle is triggered after a set time interval, when the filter effluent turbidity is greater than a treatment guideline ...

9. Trickling filter - Wikipedia

   en.wikipedia.org/wiki/Trickling_filter

   Trickling filter. A trickling filter is a type of wastewater treatment system. It consists of a fixed bed of rocks, coke, gravel, slag, polyurethane foam, sphagnum peat moss, ceramic, or plastic media over which sewage or other wastewater flows downward and causes a layer of microbial slime (biofilm) to grow, covering the bed of media.