Rinnai, Noritz, and other leading tankless water heater manufacturers specifically recommend vinegar-based descaling solutions — and this is the tankless water heater flush kit built around that recommendation. The centerpiece is a full gallon of 20% concentrated vinegar that dilutes to 4 gallons of ready-to-use flushing solution: natural, safe, effective, and manufacturer-approved.

What's Included

• 6-gallon bucket with lid
• 1/6 HP submersible pump
• 2 PVC-coated premium hoses
• Pump grate
• 1 gallon 20% concentrated vinegar solution (dilutes to 4 gallons)
• Bonus maintenance tag

Key Features & Benefits

• Manufacturer-recommended formula — vinegar-based descaling is endorsed by Rinnai and other major tankless heater brands; flush with confidence knowing you're following OEM guidelines
• Outstanding value per flush — 1 gallon of 20% concentrate dilutes to 4 full gallons of working solution, enough for multiple flush cycles or several annual services
• Natural and eco-friendly — no synthetic chemicals; safe for plumbing, septic systems, and the environment
• 6-gallon bucket — larger than the standard 5-gallon, providing extra capacity when working with diluted solution volumes
• PVC-coated premium hoses — flexible and durable for clean, secure connections to tankless service valves
• Bonus maintenance tag — attach to the unit as a reminder of the last service date; helps maintain a consistent annual flushing schedule
• Flush in 30 minutes or less — straightforward process with no special equipment or plumbing knowledge required

Compatible Tankless Water Heater Brands

Works with all major brands, including Rinnai, Navien, Rheem, Bosch, Noritz, Takagi, Tempra, Ecosmart, Stiebel Eltron, Eccotemp, and others. Especially well-suited for Rinnai flush kit applications, where manufacturer documentation explicitly recommends a vinegar-based flushing method.

Follow the Manufacturer's Playbook

If you want to flush your tankless water heater the way the manufacturer intended — with a natural, proven, non-corrosive solution — this is the tankless water heater flushing kit to reach for. The dilution ratio means one gallon goes a long way, and the included maintenance tag helps you stay on schedule year after year.

Backed by the Chromex Tools satisfaction guarantee. Trusted by homeowners and professionals across North America.