Lowest Price Found
$424.80
at Walmart
Price Comparison
Comparing 3 retailers for the best deal
Prices range $424.80–$674.99 — save up to $250.19 by choosing the right store.
Prices verified 1 day ago(Jul 15, 2026, 12:02 AM)
Product prices and availability are accurate as of Jul 15, 2026, 12:02 AM and are subject to change. Any price and availability information displayed on the retailer's site at the time of purchase will apply.
Technical Specifications
Product Details
BrandRheem
ModelRTEX-18
UPC020352685335
EAN0020352685335
CategoryWater Heaters
Frequently Asked Questions
What is the best price for Rheem 18kW 240V Tankless Electric Water Heater?+
The lowest in-stock price right now is $424.80 at Walmart. We compare 3 retailers every day so you always see the cheapest current price.
Where can I buy Rheem 18kW 240V Tankless Electric Water Heater?+
Rheem 18kW 240V Tankless Electric Water Heater is currently available at Amazon, eBay, and Walmart. Use the Price Comparison table above to jump straight to the cheapest listing.
You Might Also Like
6% OFF
Rheem
Rheem RTEX-24 24kW 240V Electric Tankless Water Heater, Gray
$514.98$549
from 1 retailers
Rheem
Rheem 11kW 240V Tankless Electric Water Heater
$252.18
from 3 retailers
Rheem
Rheem 8kW 240V Tankless Electric Water Heater
$251.51
from 3 retailers
zhenmaster
Dual Installation Water Boiler Wall Mount & Countertop, 40-100°C Adjustable Temperature Water Heater, Optional Single Double Triple Tap, Easy Clean Drain Outlet for Catering Use(Black,3)
$383.99
from 1 retailers
Price Comparison
Comparing 3 retailers for the best deal
W
WalmartAt Walmart
In Stock
$424.80Buy at Walmart
eB
eBaySeller listings
In Stock
$674.99Buy at eBay
A
AmazonAt Amazon
In Stock
Prices verified 1 day ago(Jul 15, 2026, 12:02 AM)
Product prices and availability are accurate as of Jul 15, 2026, 12:02 AM and are subject to change. Any price and availability information displayed on the retailer's site at the time of purchase will apply.
Spotted a lower price?
We refresh prices regularly, but retailers move fast. If you found this item cheaper somewhere we compare, let us know and we'll take a look.