Daisy
Last Updated: Feb 8, 2026
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| SELLER | SELLER SCORE | AMAZON FULFILLED | PRIME | FREE SHIPPING |
|---|---|---|---|---|
| True Energy | 9.79 | ✅ | ✅ | ✅ |
4 Piece Tankless Water Heater Flush Kit. Helps maintain and extend the lifespan of your tankless water heater
Kit comes with 3.5 gallon bucket with lid, 1/6 HP Pump, and 2 Steel hoses. Just add 2-3 gallons of vinegar or your own descaling solution
Works with most all tankless water heaters such as Rinnai, Bosch, Noritz, Rheem, Takagi, Tempra, Navien, Ecosmart, Stiebel, Eccotemp, Atmor, Trutankless, Marey Power, and others.
6 Foot hoses easily connect to tankless heater valves, and the kit will clean most heaters in 30 minutes or less! Usage instructions are included as an info-graphic on this listing as well as with your kit.
Chromex manufactures a variety of quality tools for both the do it yourself-er and the professional. We know that sometimes things can get a bit messy. We are here to help! Please contact us with any questions or concerns. All our products also come with a 1-year warranty and hassle-free returns.
| SELLER | SELLER SCORE | AMAZON FULFILLED | PRIME | FREE SHIPPING |
|---|---|---|---|---|
| GloryBox | 3.63 | ❌ | ❌ | ❌ |
Original Design: Tankless hot water heater only heats when necessary to conserve energy; For the latest in non-condensing technology and a cleaner layout that speeds up service and installation, check out our new RE160iP model
Never Run Out of Hot Water with this Compact Propane Water Heater: Non-condensing tankless hot water heater from Rinnai is only the size of a small suitcase and fits in a wide variety of spaces, but provides up to 6.5 GPM (5 fixtures at once)
Smart, Durable Design: Enhanced scale detection helps prevent serious, long-term damage to unit; Includes 15-, 5-, and 1-year residential guarantee for heat exchanger, labor, and parts, respectively; See Controlr module for WiFi control (not included)
Professional Installation Recommended: Visit the Find a Rinnai PRO page on our website to locate a qualified technician in your area to install your tankless water heater; We do not recommend installing a water heater without a technician
Find Your Rinnai: See our product guides, manuals, energy guide, warranty information, videos, and tables to find the right tankless water heater for your home; Check our Ground Water Temperature Map to see if this heater is optimal for your region
| SELLER | SELLER SCORE | AMAZON FULFILLED | PRIME | FREE SHIPPING |
|---|---|---|---|---|
| Zurety | 9.92 | ❌ | ❌ | ❌ |
***Kit requires 2 gallons of white vinegar*** Not included. Some tankless manufacturers recommend using vinegar or another cleanser for flushing their equipment. Can also save money if you have vinegar at home already.
Helps maintain the performance and extend the life of your tankless hot water heater. Easy directions for DIY Homeowner use.
Includes 1/8 HP Utility Pump, 6 Ft Color Coded Hoses, 3.5 Gallon Bucket with EZ Open Lid & Instructions for using vinegar. Peel Off Lid is super flexible and much easier to remove than traditional paint bucket lids.
Easily connects to tankless isolation valves using supplied 6' Color Coded Hoses.
Works with Rheem, Bosch, Noritz, Rinnai, Takagi, Navien, Stiebel, Atmor, Ecosmart, Eccotemp, Marey Power, Tempra, Trutankless and others.
| SELLER | SELLER SCORE | AMAZON FULFILLED | PRIME | FREE SHIPPING |
|---|---|---|---|---|
| DataAlchemy | 9.40 | ❌ | ❌ | ❌ |
Original Design: Tankless hot water heater only heats when necessary to conserve energy; For the latest in non-condensing technology and a cleaner layout that speeds up service and installation, check out our new RE180iP model
Never Run Out of Hot Water with this Compact Propane Water Heater: Non-condensing tankless hot water heater from Rinnai is only the size of a small suitcase and fits in a wide variety of spaces, but provides up to 7.5 GPM (5 fixtures at once)
Smart, Durable Design: Enhanced scale detection helps prevent serious, long-term damage to unit; Includes 15-, 5-, and 1-year residential guarantee for heat exchanger, labor, and parts, respectively; See Controlr module for WiFi control (not included)
Professional Installation Recommended: Visit the Find a Rinnai PRO page on our website to locate a qualified technician in your area to install your tankless water heater; We do not recommend installing a water heater without a technician
Find Your Rinnai: See our product guides, manuals, energy guide, warranty information, videos, and tables to find the right tankless water heater for your home; Check our Ground Water Temperature Map to see if this heater is optimal for your region
| SELLER | SELLER SCORE | AMAZON FULFILLED | PRIME | FREE SHIPPING |
|---|---|---|---|---|
| Amazon.com | 9.68 | ✅ | ✅ | ✅ |
Original Design: Tankless hot water heater's Circ-Logic technology offers recirculation patterns that match your habits; For the latest in non-condensing technology that speeds up service and installation, check out our new RE160iP model
Never Run Out of Hot Water with this Compact Propane Water Heater: Non-condensing tankless hot water heater from Rinnai is only the size of a small suitcase and fits in a wide variety of spaces, but provides up to 7.5 GPM (5 fixtures at once)
Smart, Durable Design: Includes 12-, 5-, and 1-year residential guarantee and 5-, 5-, and 1-year commercial factory warranty for heat exchanger, labor, and parts, respectively; See Controlr module for WiFi control (not included)
Professional Installation Recommended: Visit the Find a Rinnai PRO page on our website to locate a qualified technician in your area to install your tankless water heater; We do not recommend installing a water heater without a technician
Find Your Rinnai: See our product guides, manuals, energy guide, warranty information, videos, and tables to find the right tankless water heater for your home; Check our Ground Water Temperature Map to see if this heater is optimal for your region
| SELLER | SELLER SCORE | AMAZON FULFILLED | PRIME | FREE SHIPPING |
|---|---|---|---|---|
| Amazon.com | 9.68 | ✅ | ✅ | ✅ |
Endless Hot Water: Enjoy unlimited hot water flow throughout the house; compact, durable, and easy to install; professional installation recommended
Energy and Space Efficient: Space-saving design conserves energy as it heats only when necessary
Optimal Water Pressure: High-performance up to 5.3 GPM hot water flow rate for a powerful, constant stream
Enhanced scale detection lessens possibility of serious, long-term damage to unit
Guaranteed to Last: 10-, 5-, and 1-year residential factory warranty for heat exchanger, labor, and parts, respectively
| SELLER | SELLER SCORE | AMAZON FULFILLED | PRIME | FREE SHIPPING |
|---|---|---|---|---|
| GloryBox | 3.63 | ❌ | ❌ | ❌ |
Discontinued. Please see new model RSC199iP
Energy and Space Efficient: Space-saving design conserves energy as it heats only when necessary
Optimal Water Pressure: Up to 11 GPM hot water flow rate for a powerful, constant stream
Instant Heating: ThermaCirc360 technology provides faster hot water with a built-in recirculation pump, timer and thermal bypass valve - ideal for homes without a dedicated return line
Guaranteed to Last: 15-, 5-, and 1-year residential for heat exchanger, labor, and parts, respectively. Wifi monitoring.
| SELLER | SELLER SCORE | AMAZON FULFILLED | PRIME | FREE SHIPPING |
|---|---|---|---|---|
| Amazon.com | 9.68 | ✅ | ✅ | ✅ |
Endless Hot Water: Enjoy unlimited hot water flow throughout the house; compact, durable, and easy to install; professional installation recommended
Energy and Space Efficient: Space-saving design conserves energy as it heats only when necessary
Optimal Water Pressure: Up to 7 GPM hot water flow rate for a powerful, constant stream
Instant Heating: Equipped with Circ-Logic - Pair with an external pump to reduce wait time for hot water via scheduled or on-demand recirculation
Guaranteed to Last: 15-, 5-, and 1-year residential for heat exchanger, labor, and parts, respectively. Wifi monitoring.
| SELLER | SELLER SCORE | AMAZON FULFILLED | PRIME | FREE SHIPPING |
|---|---|---|---|---|
| Amazon Warehouse | 9.90 | ✅ | ✅ | ✅ |
Original Design: Tankless hot water heater only heats when necessary to conserve energy; For the latest in non-condensing technology and a cleaner layout that speeds up service and installation, check out our new RE199iN model
Never Run Out of Hot Water with this Compact Tankless Gas Water Heater: Non-condensing tankless hot water heater from Rinnai is only the size of a small suitcase and fits in a wide variety of spaces, but provides up to 9.8 GPM (6 fixtures at once)
Smart, Durable Design: Enhanced scale detection helps prevent serious, long-term damage to unit; Includes 15-, 5-, and 1-year residential guarantee for heat exchanger, labor, and parts, respectively; See Controlr module for WiFi control (not included)
Professional Installation Recommended: Visit the Find a Rinnai PRO page on our website to locate a qualified technician in your area to install your tankless water heater; We do not recommend installing a water heater without a technician
Find Your Rinnai: See our product guides, manuals, energy guide, warranty information, videos, and tables to find the right tankless water heater for your home; Check our Ground Water Temperature Map to see if this heater is optimal for your region
| SELLER | SELLER SCORE | AMAZON FULFILLED | PRIME | FREE SHIPPING |
|---|---|---|---|---|
| Amazon.com | 9.68 | ✅ | ✅ | ✅ |
Indoor Heater: Space heaters for indoor use have a warm air outlet with bottom front louvers and a cool-to-touch child-safe cabinet with a safety lock; ductless heater is vent- and hassle-free
Smart Features: Energy-efficient space heater includes digital adaptive control, a programmable thermostat display, and self-diagnostics for simple smart heater maintenance
Safe Settings: Electric heater features a flame failure device, overheat switch, oxygen depletion sensor, and tilt switch designed to automatically disable gas/power if the device overheats, overturns, or is extinguished
Portable Design: Vent-free gas fan convection heater is suitable for homes, apartments, condominiums, and commercial settings; Portable heater is modular/mobile home approved
| SELLER | SELLER SCORE | AMAZON FULFILLED | PRIME | FREE SHIPPING |
|---|---|---|---|---|
| Amazon.com | 9.68 | ✅ | ✅ | ✅ |
Indoor Heater: Space heaters for indoor use have a warm air outlet with bottom front louvers and a cool-to-touch child-safe cabinet with a safety lock; ductless heater is vent- and hassle-free
Smart Features: Energy-efficient space heater includes digital adaptive control, a programmable thermostat display, and self-diagnostics for simple smart heater maintenance
Safe Settings: Electric heater features a flame failure device, overheat switch, oxygen depletion sensor, and tilt switch designed to automatically disable gas/power if the device overheats, overturns, or is extinguished
Portable Design: Vent-free gas fan convection heater is suitable for homes, apartments, condominiums, and commercial settings; Portable heater is modular/mobile home approved
| SELLER | SELLER SCORE | AMAZON FULFILLED | PRIME | FREE SHIPPING |
|---|---|---|---|---|
| Amazon.com | 9.68 | ✅ | ✅ | ✅ |
Endless Hot Water: Enjoy unlimited hot water flow throughout the house; compact, durable, and easy to install; professional installation recommended
Energy and Space Efficient: Space-saving design conserves energy as it heats only when necessary
Optimal Water Pressure: High-performance 6.5 GPM hot water flow rate for a powerful, constant stream
Multiple venting options available including PVC/CPVC using the Ubbink Concentric to Twin Pipe adaptor allow for an easy installation
Guaranteed to Last: 12-, 5-, and 1-year residential factory warranty for heat exchanger, parts, and labor respectively
| SELLER | SELLER SCORE | AMAZON FULFILLED | PRIME | FREE SHIPPING |
|---|---|---|---|---|
| Amazon.com | 9.68 | ✅ | ✅ | ✅ |
Energy and Space Efficient: Space-saving design conserves energy as it only heats when necessary; multiple venting options offer installation flexibility
Optimal Water Pressure: High-performance 11 GPM hot water flow rate for a powerful, constant stream
Instant Heating: Circ-Logic technology enables recirculation patterns that coincide with your typical habits; Wi-Fi monitoring creates hot water on demand
Guaranteed to Last: 8-, 5-, and 1-year commercial warranty for heat exchanger, parts, and labor, respectively
| SELLER | SELLER SCORE | AMAZON FULFILLED | PRIME | FREE SHIPPING |
|---|---|---|---|---|
| Amazon.com | 9.68 | ✅ | ✅ | ✅ |
Hot water heater: Heat the whole house with this boiler featuring a self-cleaning stainless-steel heat exchanger with a modulating wire mesh burner and a secondary flat plate heat exchanger for showers and faucets
Smart Features: Multizone control capability allows thermostat and control pumps to connect directly to the boiler that warms the house and the tap water; smart heater features a safety child-lock that automatically turns off central heating
User-Friendly Interface: Electric heater features a digital display main screen, a temperature and pressure display, and an outdoor reset sensor with easy parameter settings; up/down arrows adjust the temperature between 104°F and 180°F
Space-Saving Design: Compact wall-mounted design of this water heater saves space; multiple venting options include a 2-inch PVC up to 65 feet and 3-inch up to 150 feet
Guaranteed to Last: 12-, 5-, and 1-year residential and 5-, 5-, and 1-year commercial standard warranty for heat exchanger, parts, and labor respectively
| SELLER | SELLER SCORE | AMAZON FULFILLED | PRIME | FREE SHIPPING |
|---|---|---|---|---|
| DET Liquidation | 9.62 | ❌ | ❌ | ❌ |
Endless Hot Water: Enjoy unlimited hot water flow throughout the house; compact, durable, and easy to install; professional installation recommended
Energy and Space Efficient: Space-saving design conserves energy as it heats only when necessary
Optimal Water Pressure: High-performance 7.5 GPM hot water flow rate for a powerful, constant stream
Multiple venting options available including PVC/CPVC using the Ubbink Concentric to Twin Pipe adaptor allow for an easy installation
Guaranteed to Last: 12-, 5-, and 1-year residential factory warranty for heat exchanger, parts, and labor respectively
| SELLER | SELLER SCORE | AMAZON FULFILLED | PRIME | FREE SHIPPING |
|---|---|---|---|---|
| Amazon.com | 9.68 | ✅ | ✅ | ✅ |
Smart-Circ Intelligent Recirculation: This tankless hot water heater features Smart-Circ technology that learns your water usage patterns, then schedules pump and recirucation accordinlgy for superior energy efficiency and convenience
Never Run Out of Hot Water with this Compact Tankless Gas Water Heater: This indoor condensing tankless hot water heater from Rinnai is only the size of a small suitcase, but provides up to 11 GPM (7 fixtures at once)
Smart, Durable Design: With multiple venting options, water heater fits a wide array of spaces; Includes 15-, 5-, and 1-year residential guarantee for heat exchanger, labor, and parts, respectively; See Controlr module for WiFi control (not included)
Professional Installation Recommended: Visit the Find a Rinnai PRO page on our website to locate a qualified technician in your area to install your tankless water heater; We do not recommend installing a water heater without a technician
Find Your Rinnai: See our product guides, manuals, energy guide, warranty information, videos, and tables to find the right tankless water heater for your home; Check our Ground Water Temperature Map to see if this heater is optimal for your region
| SELLER | SELLER SCORE | AMAZON FULFILLED | PRIME | FREE SHIPPING |
|---|---|---|---|---|
| Amazon.com | 9.68 | ✅ | ✅ | ✅ |
Hot Water Heater: Heat the whole house with this boiler featuring a stainless-steel heat exchanger with a modulating wire mesh burner and a built-in domestic hot water plate heat exchanger for showers and faucets
Smart Features: Multizone control capability allows thermostat and integrated control pumps to connect directly to the boiler that warms the house and the tap water; smart heater features a safety child-lock that automatically turns off central heating
User-Friendly Interface: Electric heater features a digital display main screen, a temperature and pressure display, and an outdoor reset sensor with easy parameter settings; adjust the CH temperature between 104°F and 180°F and DHW between 98°F and 140°F
Space-Saving Design: Compact wall-mounted design of this water heater saves space; multiple venting options include a 2-inch PVC up to 65 feet and 3-inch up to 150 feet
Guaranteed to Last: 12-, 5-, and 1-year residential and 5-, 5-, and 1-year commercial standard warranty for heat exchanger, parts, and labor respectively
| SELLER | SELLER SCORE | AMAZON FULFILLED | PRIME | FREE SHIPPING |
|---|---|---|---|---|
| Amazon.com | 9.68 | ✅ | ✅ | ✅ |
Smart Design: Improved design of tankless hot water heater only heats when necessary to conserve energy; Speeds installation and enhances serviceability with a cleaner internal layout; LED screen provides service reminders and error codes
Never Run Out of Hot Water with this Compact Tankless Gas Water Heater: This non-condensing indoor tankless hot water heater from Rinnai is only the size of a small suitcase, but provides up to 5.3 GPM (5 fixtures at once)
Smart, Durable Design: Water heater fits a wide array of spaces; Includes 15-, 5-, and 1-year residential guarantee for heat exchanger, labor, and parts, respectively; See Controlr module for WiFi control (not included)
Professional Installation Recommended: Visit the Find a Rinnai PRO page on our website to locate a qualified technician in your area to install your tankless water heater; We do not recommend installing a water heater without a technician
Find Your Rinnai: See our product guides, manuals, energy guide, warranty information, videos, and tables to find the right tankless water heater for your home; Check our Ground Water Temperature Map to see if this heater is optimal for your region
Here is the list of top-rated brands that were evaluated by PM.
| Brand | Count |
|---|---|
| Rinnai | 48 |
| Chromex | 1 |
| Kelaro | 1 |
We've carried out a comprehensive analysis of 6,037 reviews on heaters, using our selection criteria to identify the best options in the categories. Our findings reveal that most customers typically select heaters priced around $1,294.48, with top brands including and
Our team of expert editors reviewed these high-quality items and handpicked the top 18 heaters for your consideration. We've also done extensive research on numerous sellers, identifying the best ones in the categories category. These include and .
We are dedicated to assisting our users in finding the right heaters Products based on their needs, saving them considerable time when choosing which heaters to buy. We take pride in the number of satisfied users we've helped through our thorough and insightful reviews.