6699 Tankless Water Heater Flushing Kit — Stainless Sump Pump, Adapters, Bucket Opener, and Hoses

Keep Your Tankless Water Heater Performing at Its Best

The 6699 Tankless Water Heater Flushing Kit is a complete maintenance solution designed to support on-demand hot water systems. Built around a durable stainless steel sump pump, the kit helps you flush mineral buildup and debris that can affect efficiency and response time. The included adapters and hoses provide flexible compatibility with common isolation valves, making setup straightforward for DIY users and pros alike. Note that the cleaning agents themselves aren’t included, but to flush the system you can mix 1 gallon of vinegar or a biodegradable cleaner with 1 gallon of water before running the cycle. The result is a calmer, cleaner flush process that fits into a regular maintenance routine.

What makes this kit stand out

• Durable, quiet operation — a full stainless steel housing protects against corrosion while minimizing noise during use, helping you finish tasks without disruption.
• Reliable power and headroom — with a 1/3 HP motor, the pump delivers solid flow up to 2000 GPH and a max head of 21 ft, supporting thorough flushing even in tighter spaces.
• Safe, practical design — built-in thermal overload protection guards the motor, contributing to longer service life and safer operation in various environments.

Kit contents and practical benefits

• Two adapters and two 6' hoses with washers — quick, secure connections to tankless isolation valves, reducing setup time and leaks.
• 3-gallon bucket with lid opener — a convenient reservoir and a tool to open the lid with less effort, supporting cleaner, safer handling.
• Included bucket lid opener — ergonomic design and anti-slip grip for safer, more controlled lid removal during maintenance.

Specifications at a glance

• Pump: 115V / 60Hz, 1/3 HP, max 2.7 Amps
• Max head: 21 feet; Max flow: 2000 GPH
• Submersion depth: up to 16 feet; Fluid temp limit: 95 °F
• Pump dimensions: compact footprint for easy storage
• Bucket: 9.8" x 9.8" x 11.4"; Bucket lid opener designed for leverage

Usage ideas and real-world scenarios

• Routine flushing after periods of hard water to maintain steady hot water delivery.
• Seasonal maintenance to keep your tankless system responsive and efficient.
• Simplified DIY projects where a compact, reliable pump and hose kit are helpful for controlled fluid transfer.

When you’re ready to refresh your tankless heater, this kit offers a practical, well‑rounded set of tools that support a clean, repeatable process without pressure or guesswork. The approach is designed to feel achievable, with emphasis on safety, durability, and straightforward setup.