1. Within one year from the date of purchase of the product, the company will provide free maintenance if the quality problem occurs, except in the following cases:

1) failure or damage caused by not installing and using in accordance with the product instructions;

2) failure or damage caused by force majeure, fire, abnormal voltage, abnormal temperature, etc.

3) improper user selection or severe environmental changes after installation;

4) failure or breakdown of the product before installation or after installation.;

5) diaphragm, seals, springs and coils exceed the warranty period (the warranty period of the diaphragm components is 3 years, and the remaining 1 years).

2. Lifelong warranty, beyond the warranty period or abnormal use of the maintenance, the company provides paid maintenance, collection of maintenance costs, transportation, mailing fees. Within 3 months, repeated failures occurred and free services were available.

3. If the product beyond the warranty period or obsolete, if the degree of damage is serious, no spare parts supply or other uncontrollable factors lead to unable to repair, the company no longer provides maintenance services;

4. Transportation and post fees are charged for replacement of goods due to customer reasons.

5. Custom service fees will be collected for product upgrading and customization services;

6. Service hotline and technical support: +86-13918870608.