Results 1 to 3 of 3
  1. Newbie
    Interested in Language
    • Member Info
      • Native Language:
      • Vietnamese
      • Home Country:
      • Vietnam
      • Current Location:
      • Vietnam

    • Join Date: Sep 2007
    • Posts: 9

    Question Understand the meaning

    Dear teacher,
    What is grade water in
    "Waste water treatment and grade water systems", it is related to plumping and drainage services in a building.

  2. Neillythere's Avatar
    Senior Member
    Interested in Language
    • Member Info
      • Native Language:
      • British English
      • Home Country:
      • England
      • Current Location:
      • Thailand

    • Join Date: Mar 2008
    • Posts: 536

    Re: Understand the meaning

    I'm not a teacher, but "grade" means "ground level", so "grade water" is typically rain water and the like that is (normally) uncontaminated by sewerage or other pollutants.

    Normally you would have:
    a "Clean Water Sewer" (CWS) for "grade water"
    a "dirty" or "foul" water sewer

    and, on industrial sites, an "oily water sewer" that goes into a pit, where the oil and water are separated. The water can then be treated, reasonably free of oil, and the oil either disposed of separately or recycled to some stage in the process, where it can be recovered.

    Hope this helps

    • Join Date: Nov 2007
    • Posts: 5,403

    Re: Understand the meaning

    Domestically, there are three types of water. There is Utility Grade Water, Working Grade Water and Drinking Water.
    Utility grade water is water suited for watering your lawn and plants. It may not have had any treatment.
    Working Grade Water needs to be higher quality because it runs through your plumbing, fixtures and water-using appliances. To make these essential household systems last longer and save you money, treated water is needed.
    Drinking Water has to be of the highest quality.

    Water can also be distilled to be suitable for laboratory-grade, analytical-grade or reagent-grade water – water which has been highly purified for specific uses in science or engineering.

Similar Threads

  1. in the meaning, in meaning
    By user_gary in forum Ask a Teacher
    Replies: 1
    Last Post: 20-Jun-2007, 11:28
  2. Any grammar or interpretation mistakes, or any oddities?
    By asad hussain in forum Ask a Teacher
    Replies: 42
    Last Post: 04-May-2007, 07:05
  3. Replies: 6
    Last Post: 05-Sep-2005, 14:36
  4. UNDERSTAND MEANING...please help
    By Anonymous in forum Ask a Teacher
    Replies: 3
    Last Post: 08-Jun-2005, 04:49


Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts