How to purchase a good water purification equipment system?

1, ready to raw water quality report to determine the water quality standards they need to achieve the equipment, because the water quality of each region is ever-changing, not according to their own raw water to buy generic equipment, is not scientific

2, to provide their own design capacity, all the water used in the production process to do a detailed statistical avoidance of a small horse-drawn cart, the maintenance of machines and the use of unfavorable

3, to determine the material and control, different materials and the level of control has a great impact on the offer

4, to determine the 3 to 5 well-known manufacturers, further investigation of the production, processing means and technical strength is necessary.