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What’s in my water?
Free ZIP-code report from public EPA drinking-water data.
Shop the systems
T-18 whole-house and LotusDY under-sink, with free U.S. shipping.
How the T-18 works
8-stage whole-house filtration — no salt, no electricity.
How the LotusDY works
Under-sink purification with adjustable mineral content.
Water quality guides
Hard water, PFAS, well water, baby formula, and testing.
Certifications
IAPMO listings and NSF/ANSI 42, 61, and 372 test documents.
FAQ
Flow rate, maintenance, warranty, shipping, and installation.
Track an order
Look up shipping status with your order number.
Looking for a manual or spec sheet? Product manuals and installation documents live on the Manuals & resources page.
Still stuck? Call (916) 400-0725 or email info@crystalflowh2o.com and we will point you to the right page.