Waterpik Promax Water Flosser vs OasiSmile FC180 Water Flosser

Buy the Waterpik Promax if you want the brand dentists recommend most, a guided Smart Advance mode that eases you from gentle to deep cleaning, and two saved profiles for couples. The OasiSmile FC180 is the better pick if you want more tips in the box and a bigger tank for a family at a lower outlay. Reviewers rate the Waterpik higher (4.5 vs 4.1), and its ADA acceptance and clinical backing are things the OasiSmile cannot claim. The OasiSmile is a basic but serviceable irrigator with fewer refinements.

• Choose the Waterpik Promax if you want proven gum-health results, quieter operation and a guided ramp-up to deep cleaning.
• Choose the OasiSmile FC180 if you want a large tank and five tips for a family and do not need the dental-professional backing.