Q1:Do you provide samples? is it free or extra? A:Yes, we could offer the sample for free charge via FedEx, DHL, TNT, UPS or EMS. but don't pay the cost of freight.
Q2: What's your payment terms? A: T/T in advance are highly recommended. We can accept LC, Western Union as well. TT will be more appreciated. 30% deposit before producing, 70% balance before loading by TT.
Q3:What is the delivery time? A:It depends on order quantities. Generally speaking, for sample, in about 3 working days after payment; for larger orders, with 7-15 working days upon receipt of your payment (or LC).
Water Purification :: Washington State Department of Health
Purifying by adding liquid chlorine bleach. Treat water by adding liquid household bleach, such as Clorox or Purex. Household bleach is typically between 5.25 percent and 8.25 percent chlorine. Avoid using bleaches that contain perfumes, dyes and other additives. Cloudy water should be filtered before adding bleach
Water chlorination is the process of adding chlorine or chlorine compounds such as sodium ... Chlorine gas was first used on a continuing basis to disinfect the water supply at the Belmont filter plant, Philadelphia, Pennsylvania by using a