There are different conditions that each will have an effect on tanks' life:
  •  The kind and temperature of the materials which are kept in the tanks: If a tank is used in the temperature which has not been designed for using, the tank life will decrease. Some of the chemical substances have long effect on polyethylene. For instance, the solution hypochlorite is spoiled if it is in vicinity of sunlight. It causes some sediment to be created on the bottom of the tank. If this sediment is removed from the tank bottom periodically, the tank life will increase.
  •  How to establish tanks: One of the most important factor having an effect on the tanks is to establish them incorrectly. For more information, refer to the instructions. The instructions will be given to you with a leaf of guarantee by permissible TPC agencies.
  •  Being in vicinity of sunlight and ultra-violet ray: The tanks being kept in closed-air space live more than those which are in vicinity of the sun's ultra-violet ray.
  •  How to use tanks: The tanks used to keep the fluids and the amount of the fluid in the tanks is always in a certain level will live more than those which are always being filled or emptied. Meanwhile, the tanks fixed and kept will live more than those are always being transferred continuously.
There is a label on all the products manufactured by TPC which the instructions of establishing tanks are written on them. Meanwhile, the instructions including fixing, keeping, and using tanks with a leaf of guarantee will be delivered to you by the permissible TPC agencies.
No. Freezing cannot do any damage to the tanks spontaneously. You only have to be sure that there should be some empty space in the upper part of the tank so that the water can expand from 0 to –4 degree centigrade.
Yes, the month when the tanks are manufactured is engraved on them. Meanwhile, the label is stuck on the tanks by which the production day and shift of the tanks can be recognized easily.
TPC guarantees the quality of its own products for three years. All the tanks whose instructions including fixing, keeping, and uses are observed are liable to guarantee. The instructions will be given to you when the permissible agencies of TPC deliver you the products with a leaf of guarantee.
No, these tanks have been designed and manufactured for atmospheric pressure, only.
The materials used to manufacture the products are often the polyethylene with hygienic grade. Among the polymers, HDPE or MDPE is highly resistant to the strokes and also resistant to a wide range of chemical products. TPC manufactures its tanks using XLPE for specific uses.
 These materials are resistant to surprisingly heavy strokes and also the environmental troubles, and so they can be used to keep a wider range of chemical products.
 In addition, they support higher service temperature in comparison with PE ordinary tanks.
Because of having one non-conductor layer, the heat interchange between the fluid in the tank and the environment is minimized.
Yes, the three-layer and four-layer tanks quite anti-algal because of having one layer to prevent the sunlight penetrating the tanks.
Meanwhile, no algal can grow in the single and two-layer tanks if they are kept in suitable places (refer to the answer to the third question).
TPC manufactures several kinds of tanks for keeping nutrients and drink water. The colorless tanks are good to keep nutrients and drink water in closed space. The two-layer tanks are good to keep drink water for mild and cold regions and three-layer ones for warm regions.

As the tanks manufactured by TPC are produced with the primary substances and additives having hygienic grade. They are completely suitable for hygienic uses and drink water can be kept in them with no changes in its color, smell, and taste. Meanwhile, The TPC tanks have a certification of hygienic production from the ministry of health, treatment, and medical training.
The tanks manufactured by TPC are good to keep most chemical products.
The following table indicates some chemical products which cannot be kept in the tanks built by TPC because of not being adaptable to primary polyethylene materials.
TPC, Moreover, manufactures some specific tanks that cover a wider range of chemical products and are resistant to surprisingly heavy strokes. Contact the company's sales unity if the ordinary tanks do not satisfy your requirements.
  •  The price of these tanks is far lower than the price of fiber-glass and stainless steel tanks.
  •   The weight of these tanks is far lighter than metal tanks and they are easily to carry.
  •   They are desirably resistant to the strokes.
  •   They are desirably resistant to the various climatic conditions.
  •   It is possible for the user to control the level of the fluid in the transparent tanks easily because of being clear enough.
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