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  2. Grease trap - Wikipedia

    en.wikipedia.org/wiki/Grease_trap

    Interceptors require a retention time of 30 minutes to allow the fats, oils, grease, and food solids to settle in the tank. As more wastewater enters the tank, the grease-free water is pushed out of the tank. The rotting brown grease inside a grease trap or grease interceptor must be pumped out on a scheduled basis.

  3. Uniform Plumbing Code - Wikipedia

    en.wikipedia.org/wiki/Uniform_Plumbing_Code

    Designated as an American National Standard, the Uniform Plumbing Code (UPC) is a model code developed by the International Association of Plumbing and Mechanical Officials to govern the installation and inspection of plumbing systems as a means of promoting the public's health, safety and welfare.

  4. Air gap (plumbing) - Wikipedia

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

    According to the International Residential Code 2003, an air gap length must meet the requirements of being two times the effective inner diameter of the pipe (2×D) in order to be sufficient. [2] A standard widely use in the United States is: A112.1.2 Air Gaps in Plumbing Systems (For Plumbing Fixtures and Water-Connected Receptors)

  5. Tacoma’s grease-trap policy is like using a sledgehammer to ...

    www.aol.com/tacoma-grease-trap-policy-using...

    Joel Ducoste, an industry expert, suggests that smaller-scale grease traps do the job just as well with regular cleaning and maintenance. Tacoma’s grease-trap policy is like using a sledgehammer ...

  6. Trap (plumbing) - Wikipedia

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

    Water enters at right, fills the trap, and continues left. Inverted siphoning occurs below the line "A". Examples of traps [further explanation needed] In plumbing, a trap is a U-shaped portion of pipe designed to trap liquid or gas to prevent unwanted flow; most notably sewer gases from entering buildings while allowing waste materials to pass ...

  7. Backflow prevention device - Wikipedia

    en.wikipedia.org/wiki/Backflow_prevention_device

    Backflow prevention device. The simplest, most reliable way to provide backflow prevention is to provide an air gap.An air gap is simply an open vertical space between any device that connects to a plumbing system (like a valve or faucet) and any place where contaminated water can collect or pool.

  8. Uniform Mechanical Code - Wikipedia

    en.wikipedia.org/wiki/Uniform_Mechanical_Code

    Revisions to the requirements for air ducts, including factory-made air ducts and dampers; New provisions for factory-built grease ducts; New provisions for refrigeration systems, including pressure-limiting devices and hydrostatic expansion; Revisions to the sizing requirements for natural gas and propane piping systems

  9. Trump wants to shake up the US Postal Service. Here’s what it ...

    www.aol.com/finance/trump-reportedly-plans...

    President Donald Trump said he’s looking to change the US Postal service, including giving the Secretary of Commerce authority over what has been an independent organization for more than 50 years.

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