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  • Users: rjvh
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  1. rjvh

    Tannins removal

    Hi I have a problem with the water of a shalow well near sea I believe that tannins are the root of the problem but i can't hardly find decent info on the removal of this phenomenon other caracteristicts from the water are that the conductivity is higher than normal(930 mS)the PH is low...
  2. rjvh

    defenition of raw water source

    hi i am curently qouting for a job and I need to know if I have to alowe the costs of the extra pipe length and bends fittings in my qoute for the return bends on the pendend sprinklers? NFPA 13 8.14.18.1 states that you must have it in a wet sprinkler system if you have a raw water source, a...

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