YUNDA FILTER has 12 patents for water filter cartridges.
Or get on the web of WQA http://www.wqa.org, Search our company name TIANJIN JINGHAI YUNDA INDUSTRY AND TRADE CO., LTD
YUNDA FILTER has got NSF42, NSF372 Certifications from NSF and IAPMO.
We are the sole manufacturer who have got all the three authoritative certifications of NSF, WQA and IAPMO.
China Biggest Water Filters & Cartridges Manufacturer
So there is no problem in after sale service. And we are still looking for local factories in other countries, to unfolding depth of cooperation.