Tankless Water Heaters
tankless water heaters — pre-owned
Browse 1,507 tankless water heaters — pre-owned on eBay — listings updated every few minutes. All items are pre-owned and sold by eBay sellers directly.

【Refurbished】RV Water Heater Gas & Electric 6 Gallon Tank 12000 BTU Replacement
Refurbished - KingRVer RV Water Heater Gas & Electric 6 Gallon Tank.
You save $120.00

6 Gallon RV Tank Water Heater Gas/Electric/Hybrid Heating NO Door -Refurbished!
Run gas and electric together for faster hot water recovery when you need it most. Easily Replaces Old4/6 Gal Water Heater. Available with optional 15" x 15" or 15" x 18" doors to match your RV cutout size.
You save $25.79

66K BTU RV Tankless Water Heater FOGATTI InstaShower 9 Pro Certified Refurbished
♻️FOGATTI Official Refurbished Item♻️. The 3-generation InstaShower RV water heater now boasts66,000 BTU and supplies hot water at up to3.6 GPM. This allowssimultaneous use in the RV's bathroom and kitchen with plenty of capacity.

120K BTU Natural Gas Tankless Water Heater Outdoor Instant Hot 5.1GPM -Certified
Tankless Water Heater. Water heater Type : Tankless. Durable and Safe for Outdoor Use: The Mizudo outdoor gas tankless water heater is built to withstand harsh conditions with 380PA wind resistance and IPX4 waterproof protection.

FOGATTI InstaShower 9 Pro RV Tankless Water Heater, 66,000 BTU w/Door+Controller
The 3-generation InstaShower RV water heater now boasts66,000 BTU and supplies hot water at up to3.6 GPM. This allowssimultaneous use in the RV's bathroom and kitchen with plenty of capacity. Fogatti RV water heater is versatile and fits various applications.

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

170K BTU Indoor Tankless Water Heater Natural Gas 7.5 GPM Instant Hot -Certified
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).

14kW Tankless Water Heater Electric 240V On Demand Instant Hot Water Heater
MIZUDO Tankless Water Heater Electric, 14kW 240Volt, For 2-3 Point of Use. The MIZUDO 14kW tankless water heater features a unique design that separates internal water and electrical circuits, eliminating the risk of electric leakage and scale buildup.

MIZUDO 199,000 BTU Tankless Water Heater NG Non-Condensing Unit WIFI+APP Enabled
♻️ MIZUDO Official Refurbished Item. When families asked 'Can we drink our water as safely as we bathe?'., we answered. Tankless Water Heater. 【Professional 199k BTU Tankless Water Heater】. BTU: 199,000 BTU.

Rheem Performance 13 kW 2.54 GPM 240-Volt Electric Tankless Water Heater
Rheem Performance 13 kW 2.54 GPM 240-Volt Electric Tankless Water Heater. Installed but never used needed to upgrade to larger size no plumbing fittings included

2.5/4.0/8.0 Gallon Mini Tank Water Heater Electric Shower Kitchen Under Sink
Water connection: 1/2" NPT; Electrical requirements: 120 Volts (AC), 1440 watts under voltage; With plug connection(Power cord: 800mm); Maximum water pressure: 150 PSI; Temperature Range: 55- 145℉ Recommended circuit breaker specification: 15 AMPS, ensuring complete electrical safety. .

Reconditioned Titan SCR-4 N-210 tankless water heater. Free same day shipping
Reconditioned N-210 tankless water heater. Works just like a new unit. It was taken to the manufacturer for re-certifying.

Rheem RTEX-18 Tankless 3.2 GPM Electric Water Heater - Grey *READ*

Westinghouse 14kW Electric Tankless Water Heater Voice Control - Certified !
Westinghouse 14kW 240V Tankless Water Heater Electric, Up to 3.38 GPM. Item Specifications Model: Westinghouse 14kW. ModelWestinghouse 14kW 240V Tankless Water Heater Electric. Heating SystemInstantaneous (Tankless).

FOGATTI InstaShower GO Pro Portable Propane Water Heater, 22,000 BTU -Certified
Series: InstaShower GO Pro. 【Portable Shower System 】FOGATTI InstaShower GO Pro is a compact and portable shower system designed for outdoor use. Heated by propane, it provides hot water in seconds for showering, washing dishes, cleaning hands, and other tasks.

18KW 4.2 GPM Tankless Water Heater Electric 240V WiFi / Voice Control -Certified
Westinghouse 18kW Tankless Water Heater Electric 240V, Up to 4.2 GPM. Item Specifications Model: Westinghouse 18kW. 𝐒𝐚𝐯𝐞 𝐒𝐩𝐚𝐜𝐞: Electric Tankless water heaters are typically smaller than traditional tank water heaters, which can be wall-mounted, and more compact in size.

Camplux BD158 Portable Tankless Gas Water Heater Overland 4X4 Camping used once
Bought new by myself and used it successfully once for the outdoor copper bathtub. Once, literally. Not like the definition of the word ‘literally’ my grandkids use, but actual fact. Includes three brass fittings.

Eccotemp EM 7 Gallon Electric Mini Tank Water Heater (Open Box)
The Eccotemp EM-7.0 ETL Certified is a point of use Mini-Tank Water Heater with a tank capacity of 7 gallons. Skip the wait at your facet for hot water and install the Eccotemp EM-7.0 Electric Mini Tank Water Heater.

Girard tankless Rv Hot water heater Model gswh-2
Was pulled from a newer Airstream

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.

Propane /Natural Gas Tankless Instant Hot Water Heater- 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.
You save $38.42

Electric Mini Tank Hot Water Heater 1.5 Gallon Storage RV -Certified Refurbished
𝗜𝗻𝘀𝘁𝗮𝗻𝘁 𝗛𝗼𝘁 𝗪𝗮𝘁𝗲𝗿 𝗪𝗵𝗲𝗿𝗲 𝗬𝗼𝘂 𝗡𝗲𝗲𝗱 𝗜𝘁 - Get hot water instantly at your sink without waiting for the central water heater. Perfect for kitchens, bathrooms, offices, RVs, food trucks and garages.
You save $18.90

RVPart Pro 60,000 BTU RV Tankless Water Heater Propane +Refurbished 15 x 15 DOOR
RVPart Pro Tankless 60,000 BTU RV Water Heater Propane w/15x15" DOOR. Compact and Lightweight Design — The RVPart Pro RV on-demand water heater is compact and lightweight, with a 15" x 15" door size and 13" x 13" opening size, making installation a breeze even in tight spaces.
You save $156.40

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 $106.00

Eemax SPEX4208 FlowCo Electric Tankless Water Heater 208V
Missing one screw to secure plate

80,000BTU 3.6GPM Tankless Water Heater Propane Gas Instant|Certified Refurbished
【99% NEW】3.6GPM 80,000BTU Tankless Water Heater Propane Instant Hot Boiler. Heating System Instantaneous (Tankless). Type Tankless Water Heater/Boiler. Heating SystemInstantaneous (Tankless). Power Source Propane Gas.
You save $32.62

RVPart Pro 60,000 BTU Propane RV Tankless Water Heater +Refurbished 15 x 18 DOOR
A Great Value! Brand-New RV Water Heater + Refurbished 15x18 Door.
You save $170.00

11kW Tankless Water Heater Electric 240V On-Demand Hot Water Heater -Certified !
MIZUDO Tankless Water Heater Electric, 11kW 240Volt, For 2-3 Point of Use. MIZUDO 11kw 240V tankless water heater electric requires a50 AMP two-pole breaker ,1 set of 8 AWG wires and 1/2" NPT water connections.

60,000 BTU RV Tankless Water Heater, InstaShower 8 Pro, 15*15 Door & Controller
ModelFogatti InstaShower 8 Pro. Our Fogatti RV Tankless Water Heater boasts an impressive power output of60,000 BTUs, allowing it to produce amaximum of 3.1 gallons per minute (GPM) of hot water. Our RV tankless water heater caters to your adventurous spirit.

Westinghouse 14kW Tankless Water Heater Electric Smart WiFi Control - Certified
Westinghouse 14kW 240V Tankless Water Heater Electric, Up to 3.38 GPM. Item Specifications Model: Westinghouse 14kW. ModelWestinghouse 14kW 240V Tankless Water Heater Electric. Heating SystemInstantaneous (Tankless).

MIZUDO 27kW Electric Tankless Water Heater For Whole House Certified Refurbished
MIZUDO 27kW Tankless Water Heater Electric 240Volt. ♻️ MIZUDO Official Refurbished Item. Mizudo tankless water heater electric provide hot water quickly and are suitable for3-4 point of use throughout the whole house.

MIZUDO 100,000 BTU Tankless Water Heater Natural Gas 4.3 GPM Indoor Installation
Natural Gas Tankless Water Heater, MIZUDO Up to 4.3 GPM 100,000 BTU Indoor Installation Instant Hot Water Heater, CSA Certified. Save over 50% of available space compared to tank water heater.
You save $12.75

Eemax SPEX4208 FlowCo Electric Tankless Water Heater 208V
Missing one screw to secure plate

Rheem 3.5kW 120V Point of Use Tankless Electric Water Heater RTEX-04T Open Box
The Rheem RTEX-04T is a 3.5kW 120V point-of-use tankless electric water heater perfect for providing hot water in various applications. This compact water heater is designed for easy installation and efficient performance.

4.0 Gallon Electric Mini Tank Water Heater 1440W Point of Use Hot Water Heater
Power: 1440W. Capacity: 4 Gallon. The machine has a built-in magnesium rod to protect the tank. The already supplied T&P valve also protects the water heater in case of excessive water pressure. MIZUDO electric tank water heater can be wall or floor-mounted in a discreet location.

Rinnai 105002002 U334-0707 RU199iN Control Board PC Board REU-N3237FF-US
Contact with questions See pictures for details Tested and worked well with no issues when installed

Eemax SPEX8208T Tankless Water Heater 8.3kW 208V *USED*
Has been installed.

Rheem Performance 27kW Electric Tankless Water Heater, Self-Modulating 5.27 GPM
The Rheem Performance 27kW Electric Tankless Water Heater is a modern, compact water heater that is ideal for homes and gardens. With its self-modulating technology and Energy Star compliance, this tankless water heater offers efficient and reliable hot water heating. Featuring a digital display and variable temperature settings, it allows for easy control and customization. The heater is designed for wall mounting, making it a convenient and space-saving option for any home. With a voltage of 240V and a 5-year warranty, this Rheem water heater is a reliable choice for instant hot water.

18KW 240V Electric Tankless Water Heater Boiler for Shower Bathroom 4.17GPM
Things to know before buying, Our Orbek tankless water heater electric 18kw requires2 x 240V/40A two-pole breakers ,2 sets of 8 AWG wires and3/4" NPT water connections. Each product undergoes rigorous testing before leaving the factory to ensure its safety and normal operation.

MIZUDO Natural Gas Tankless Water Heater 3.6 GPM 80,000 BTU Instant Hot Water
MIZUDO Natural Gas Tankless Water Heater, Up to 3.6 GPM, 80,000 BTU, CSA Certified. Water Heater Type : Tankless. Hot Water Output : 80,000 BTU. Water Flow: 3.6 GPM. Heating SystemInstantaneous (Tankless).
You save $11.25