Tankless Water Heaters
tankless water heaters — pre-owned
Browse 1,382 tankless water heaters — pre-owned on eBay — listings updated every few minutes. All items are pre-owned and sold by eBay sellers directly.

Reconditioned Titan N-160 water heater. Stainless Steel cover.
Reconditioned Titan N-160 tankless water heater. 10 Years against leak.

3.6 GPM 80,000 BTU Tankless Water Heater Propane/Natural Gas Indoor Instant Hot
【High Compatibility and Easy Installation】 Most tank water heaters have exhaust vent, water and gas pipe that can be universally used in tankless, requiring only a simple re-layout. If installing a tankless water heater in a new house, its compact size makes it easy to install.

Navien NPN-180U Tankless Gas Water Heater Stainless Steel Wi-Fi Indoor/Outdoor
The Navien NPN-180U Tankless Gas Water Heater is a versatile and energy-efficient heating solution for both indoor and outdoor use. With a stainless steel heat exchanger and low NOx emissions, this water heater offers reliable and clean heat. The units were purchased for a job that was cancelled. In new, un-opened boxes. Must Be installed by licensed contractor to honor warranty.

Navien NPN-180U Tankless Gas Water Heater Stainless Steel Wi-Fi Indoor/Outdoor
The Navien NPN-180U Tankless Gas Water Heater is a high-quality, stainless steel water heater that is both indoor and outdoor capable. With its instantaneous heating system and built-in control, it offers efficient and convenient hot water. The Wi-Fi capability and smart home compatibility allow for easy monitoring and control, while the cascading feature enables flexible installation options. New in factory sealed box. This tankless water heater, with a side water connection location, is a reliable choice for home and garden heating needs.

Tankless Water Heater Natural Gas 120k BTU Whole House|Certified Refurbished
CSA Certified – Overheat & flameout protection for safety Endless Hot Water – Instant supply, multiple outlets Precise Temp Control – ±1℉ accuracy for comfort Durable Build – Oxygen-free copper tank for longevity Compact Design – 22.8''H × 14.6''W × 7.0''D, saves 50% space Easy Install – Universal 3/4" NPT, hassle-free setup.

1440W 2.5 Gallon Mini Tank Water Heater Electric Storage -Certified Refurbished
About This Product The FOGGTI Etank 25 is a 2.5-gallon mini tank water heater designed for fast, efficient hot water delivery at a single point of use, such as a kitchen or bathroom sink. Its compact, space-saving design allows for easy under-sink or countertop installation and supports both floor-standing and wall-mounted setups. With a 1440W Incoloy heating element, it heats water rapidly by approximately 39°F per minute and maintains temperature effectively thanks to 360° seamless insulation. Simple knob temperature control (55°F-145°F) makes it user-friendly for all ages. The unit can be used standalone or as a booster for an existing system and includes all necessary installation components. It is CSA certified with multiple safety protections.
You save $101.00

FOGATTI 2.5/4/8 Gallon Electric Mini Tank Hot Water Heater-Certified Refurbished
🏅【90-99% NEW】Official Refurbished 🏅100% Positive Feedback✅Refurbished❗NOT USE❗ >Excellent heat insulation andmore energy saving. >Faster heating speed,stablet emperature. >Compact design,small size,does not occupy space. >Easy installation.
You save $8.50

Rheem Performance RETEX-11 11kW 2.15 GPM 240V Electric Tankless Water Heater
No clear signs of use however, due to condition of box, buyer should assume light use. Unable to fully test. Rheem Performance RETEX-11 11kW 2.15 GPM 240V Electric Tankless Water Heater. Point-of-Use.

Instant Hot Water Heater Propane /Natural Gas Tankless - Certified Refurbished
Instant Hot Water Heater Tankless water heaters can provide endless hot water on demand for 2- 3 water points. Comfortable Bathing Experience 3.6 GPM hot water flow, precise temperature control, no water temperature sandwich. Premium design and Durable Adopt oxygen-free copper water tank, reduce heat loss, high efficiency and durability. Compact Design Save over 50% of available space compared to tank water heater.

Fogatti Tankless Hot Water Heater Electric 18KW 240V - Certified Refurbished
Fogatti 18kW Electric Tankless Water Heater, 240V Instant On-Demand Hot Water Heater, Max 4.4 GPM Flow for 2-3 Simultaneous Point of Use, ETL-Certified (Gray). FOGATTI 18kW 240V tankless electric water heater draw max 75Amp; it requires 2 x 40 AMP Circuit Breaker Size and 2 x (8AWG/2) wires; Water connection 3/4" NPT.

MIZUDO 2.5/4/8 Gallon Electric Mini Tank Hot Water Heate【Certified Refurbished】
【Manufacturer Refurbished】 – Good Cosmetic Condition >Excellent heat insulation andmore energy saving. >Faster heating speed,stablet emperature. >Compact design,small size,does not occupy space. >Easy installation.
You save $7.60

Rheem Performance RETEX-18 Electric Tankless Water Heater 18kW Parts Only
Enjoy instant comfort without the bulky tank and wasted energy! 18kW power for efficient, fast heating. Don?t wait ?. Easy installation and durable Rheem quality you can trust. Compact, wall-mounted design saves space.

2.5/4/8 Gallon Electric Mini Tank Hot Water Heater 1440W -Certified Refurbished!
🏅【90% NEW】Official Refurbished❗Units may have some blemishes that include scratches and/or other surface imperfections, that do not affect functionality! >Excellent heat insulation andmore energy saving. >Faster heating speed,stablet emperature. >Compact design,small size,does not occupy space. >Easy installation.
You save $7.60

Navien NPN-180U Tankless Gas Water Heater Stainless Steel Wi-Fi Indoor/Outdoor
The Navien NPN-180U Tankless Gas Water Heater is a versatile and energy-efficient heating solution for both indoor and outdoor use. With a stainless steel heat exchanger and low NOx emissions, this water heater offers reliable and clean heat. The units were purchased for a job that was cancelled. In new, un-opened boxes.

180,000BTU Tankless Water Heater Propane Gas WIFI APP Control For Whole House
Water heater Type : Tankless. 26L 7.9 GPM Tankless Hot Water Heater. 1 Tankless Water HEATER. Flue Obstruction Detection. Heating SystemInstantaneous (Tankless). Model : 26L Propane Gas. Use Gas Type :Propane Gas.

Bosch 199,000 BTU 98% Gas Residential Indoor Tankless Water Heater - T9800SE199
Bosch tankless on-demand hot water heater used and not currently functioning properly but comes with a new heat exchanger that needs to be installed. Local pick up only.

Reconditioned Titan SCR-4 N-180 tankless water heater. Free same day shipping
Reconditioned N-180 tankless water heater. Looks and Works just like a new unit.

Natural Gas Tankless Hot Water Heater 4.3 GPM 100k BTU|Certified Refurbished
【90% NEW】Natural Gas Tankless Hot Water Heater 4.3 GPM 100,000BTU Whole House. Tankless water heaters can provide endless hot water on demand for 2- 3 water points. Capacity:4.3 GPM, 100,000 BTU. ModelIndoor Tankless Water Heater.

14KW Tankless Water Heater Electric, Whole House 240V - Certified Refurbished
✅Used 90% NEW✅The item shows moderate wear and is backed by a 6 month warranty. Water Heater Volume: 14KW, 240V Dimensions: 14.2"W x 9.5"H x 3.5"D Installation: Wall-mounted Electrical Requirements: 59A / 240V .

Rinnai Commercial Controller Model: MC-91-1US-S
Used item. Garanteed working perfectly. Free returns if needed.

Tankless Water Heater Propane Gas 4.3GPM 100,000BTU Indoor|Certified Refurbished
【99% NEW】Tankless Water Heater Propane Gas Up to 4.3GPM 100,000 BTU Indoor. MIZUDO 14L LPG Propane Gas Tankless Water Heater On Demand 4.3GPM Indoor. Tankless water heaters can provide endless hot water on demand for 2- 3 water points.

3500W Tankless Water Heater Electric 120V On-Demand - Certified Refurbished!
Electric Tankless Water Heater, MIZUDO 3.5KW, Instant Hot Water Heater, Adjustable Temperature, Save Space, Save Energy, Safety Protection.

Rheem RETEX-27 Electric Tankless Water Heater 27kW - Tested
The Rheem RETEX-27 Electric Tankless Water Heater is a compact, gray unit with a power source of 240V electric. It features an instantaneous heating system, digital display, and variable temperature controls. With a tankless design and a small height, this water heater is suitable for wall or under-sink mounting. The 27kW power output and first-hour recovery rate of 54 gallons per hour make it a reliable choice for providing hot water efficiently.

Natural Gas Tankless Water Heater Outdoor 5.1GPM 120K BTU|Certified Refurbished
16L/min 5.1GPM Huge Supply of Hot Water ±1°F Stable Temperature Easy to Install Designed for Outdoor Use 4-stage Precision Heating Mode 360° Security Protection CSA Certified, Exclusive Comfortech.

Certified Refurbished 170K BTU 7.5 GPM Tankless Water Heater Natural Gas Indoor
🔖【Good Refurbished】✅The item shows moderate wear and is backed by a 6 month warranty. ⚡ ▶️7.5 Gallons Per Minute 170000 BTU ▶️Wall Mounted ▶️Multi-Point Hot Water Supply ▶️2 to 5 Years Warranty ▶️Easy Indoor Installation ▶️CSA Certificated ▶️Energy Saving & High Efficiency.

Time Engineering - Gas Valve Assembly For Navian Boiler - ET72S.X0209 - 1/2psi
Part and Boiler Were Both In Excellent Condition. The valve is designed for natural gas/LP applications and must be installed by qualified personnel following all applicable codes. This Assembly is in.

CHRONOMITE LABS SR-20L/120-I Electric Tankless Water Heater 120V 6DXT1

Westinghouse 11kW Electric Tankless Water Heater 240V Up to 2.6 GPM -Certified
Westinghouse 11kW 240V Tankless Water Heater Electric, Up to 2.6 GPM. Item Specifications Model: Westinghouse 11kW. ModelWestinghouse 11kW 240V Tankless Water Heater Electric. Electric Tankless water heaters are typically smaller than traditional tank water heaters, which can be wall-mounted, and more compact in size.

100,000 BTU Tankless Water Heater Propane Gas 4.3 GPM Instant Hot Water USED
MIZUDO Propane Gas Tankless Water Heater, Up to 4.3 GPM, 100,000 BTU, CSA Certified. Water Heater Type : Tankless. Hot Water Output :14 L/min (4.3 GPM). Heating SystemInstantaneous (Tankless). Model : 14L Propane Gas.

Propane Gas Tankless Water Heater, Indoor Max 5.3 GPM, 130,000 BTU Instant Used
【Wide Application】130,000 BTU high heating capacity and maximum 5.3 GPM. It is suitable for 3-5 outlet points, which can satisfy whole family. Low noise and longer service life. 【Easy to Assemble and Use】Uses standard 1/2" NPT water inlet fittings and 3/4" NPT air inlets for quick installation.

Rheem Performance Electric Tankless Water Heater 27KW Gray Wall Digital Display
Rheem Performance Electric Tankless Water Heater 27KW Gray Wall Digital Display

FOGATTI 180,000BTU Natural Gas Tankless Water Heater Outdoor MAX.8.1 GPM -USED
FOGATTI 120,000 BTU 5.1GPM Tankless Water Heater Natural Gas For Whole House Use. Say goodbye to preheating delays! Whether it’s for showers, sinks, or appliances,even for 3-5 outlet points, it ensures uninterrupted hot water.

Stiebel Eltron Tempra 24 Plus Premium Tankless Electric Water Heater
Defective unit. For repair or parts only.

MIZUDO 2.5/4/8 Gallon Electric Mini Tank Hot Water Heater【Certified Refurbished】
🏅【99% NEW】Official Refurbished❗NOT USE >Excellent heat insulation andmore energy saving. >Faster heating speed,stablet emperature. >Compact design,small size,does not occupy space. >Easy installation.
You save $7.74

24L 7.5 GPM Tankless Water Heater Natural Gas Whole House -Certified Refurbished
Used - 24L 7.5 GPM Tankless Water Heater Natural Gas Instant Hot for whole house. Natural Gas Tankless Water Heater, MIZUDO 7.5 GPM, 170,000 BTU, CSA Certified, Indoor Installation Instant Hot Water Heater for Residential Whole House, Gen 2.

Eccotemp L5-PS Tankless Water Heater
This compact water heater has a water temperature range of 140°F and can be mounted on the wall or outdoors.

Propane Gas Tankless Water Heater, Outdoor Max 5.3 GPM, 130,000 BTU Instant Used
【Wide Application】130,000 BTU high heating capacity and maximum 5.3 GPM. It is suitable for 3-5 outlet points, which can satisfy whole family. Equipped with Anti-Freeze Protection: Prevents the water heater from freezing and cracking internally.

Thermomate On Demand Instant Endless Hot Water Heater Tankless 18kW 240V ET180
Item is in decent condition. Has marks on it. But will work great. Only includes what you see in pictures.

Used- 11KW Tankless Water Heater Electric Instant Hot On Demand Whole House 240V
Electric Tankless Water Heater, ORBEK 11KW 240V On Demand Instant Water Heater, Endless Hot Water for Residential House Use, with LED Digital Display, 1-2 Point of Use Hot Water. ORBEK electric tankless water heater, with a responsible attitude towards user safety, have undergone comprehensivesafety certification in ETL.

Natural Gas Tankless Water Heater, Indoor Max 7.5 GPM, 170,000 BTU Instant Used
Natural Gas Tankless Water Heater, MIZUDO Up to 7.5 GPM, 170,000 BTU, CSA Certified. Water Heater Type : Tankless. Hot Water Output : 24 L/min (7.5 GPM). Heating SystemInstantaneous (Tankless). Use Gas Type : Propane Gas.