Check the following points during the installation of the check valve

1. The secondary flue must be kept. The family flue is generally divided into primary and secondary. The fumes first enter the primary flue from the secondary flue. This ensures that the fumes of each household are separated, and further prevents the fumes from reversing.

2. The construction details should pay attention to the location of the range hood. Generally, the shorter the pipeline, the better. In addition, the flue opening should be on the auxiliary flue. Do not change the position at will and cause it to hit the main flue.

3. Some users directly give up the form of taking public chimneys and open directly on the windows. It should be noted that they must be approved by the property in advance. The opening should not be too small, and the flue pipe should be inclined downward on the outside to prevent rainwater from being poured back. The windshield is outside.

4. Replacement and cleaning of non-return valve. If the valve of the non-return valve can be removed and cleaned, long-term use of the non-return valve will accumulate a lot of debris. Regular cleaning or replacement of the new non-return valve can better improve smoke exhaust Efficiency, replacement every two years, cleaning once every two months is a good choice.