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2. Oil-filter wrench - Wikipedia

   en.wikipedia.org/wiki/Oil-filter_wrench

   The chain is wrapped around a spin-on oil filter, and the hexagonal bar is turned anticlockwise to grip and unscrew the filter. Strap-type oil-filter wrench. A ratchet is used to turn it. Strap-type oil-filter wrench. This one has a handle built in. Socket-type oil-filter wrench. It fits over the end of the filter and is turned with a ratchet.

3. Plumber wrench - Wikipedia

   en.wikipedia.org/wiki/Plumber_wrench

   Plumber wrench. A plumber wrench (or plumber's wrench, pipe wrench, Swedish wrench or Swedish pattern wrench[ 1]) is a form of plier described as a pipe wrench that uses compound leverage to grip and rotate plumbing pipes. Similar to the action of a Vise Grip plier, its jaw opening is adjusted to width by rotating a threaded ring.

4. Pipe wrench - Wikipedia

   en.wikipedia.org/wiki/Pipe_wrench

   Pipe wrench. A pipe wrench is any of several types of wrench that are designed to turn threaded pipe and pipe fittings for assembly (tightening) or disassembly (loosening). The Stillson wrench, or Stillson-pattern wrench, is the usual form of pipe wrench, especially in the US. The Stillson name is that of the original patent holder, who ...

5. AOL Mail

   mail.aol.com

   Get AOL Mail for FREE! Manage your email like never before with travel, photo & document views. Personalize your inbox with themes & tabs. You've Got Mail!

6. Water filter - Wikipedia

   en.wikipedia.org/wiki/Water_filter

   A water filter removes impurities by lowering contamination of water using a fine physical barrier, a chemical process, or a biological process. Filters cleanse water to different extents, for purposes such as: providing agricultural irrigation, accessible drinking water, public and private aquariums, and the safe use of ponds and swimming pools .

7. Timeline of United States inventions (before 1890) - Wikipedia

   en.wikipedia.org/wiki/Timeline_of_United_States...

   1717 Swim fins. Swim fins, also known as fins, or flippers, are blade-shaped extensions worn on feet or hands for use in water. They aid movement in aquatic sports such as swimming, surfing, and underwater diving. Swim fins are typically made of rubber or plastic. Benjamin Franklin invented wooden swim fins in 1717. [10]

8. Portable water purification - Wikipedia

   en.wikipedia.org/wiki/Portable_water_purification

   The Portable Aqua Unit for Lifesaving (short PAUL) is a portable ultrafiltration-based membrane water filter for humanitarian aid. It allows the decentralized supply of clean water in emergency and disaster situations for about 400 persons per unit per day. The filter is designed to function with neither chemicals nor energy nor trained personnel.

9. 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 ...