Privacy policy

Last updated 20 October 2026

SDN Filter (corefiltermfg.com) is operated by SDNFILTER (Lishui) Co., Ltd..

What we collect

When you send the contact form we store your email address and your message so we can reply. If you contact us on WhatsApp, that conversation lives in WhatsApp under its own terms. We count clicks on the WhatsApp button (page path, language and time, no personal details) to understand which pages generate inquiries.

What we do not do

We do not run advertising trackers, sell data, or use your inquiry for anything beyond answering it and following up about your order. Aggregate, privacy-preserving traffic statistics are provided by Cloudflare Web Analytics, which does not use cookies. The map on the contact page is served by Google Maps under Google's own terms.

Retention and requests

Inquiry records are kept while a business relationship is live or being discussed. Write to [email protected] or message us on WhatsApp +1 808 203 0374 to see or delete what we hold about you, and we will do it.