Skip to main contentSkip to footer
Slide 1 of 9

Overview

Designed for water heater systems, this expansion tank helps absorb excess pressure caused by thermal expansion, reducing stress on pipes, valves, and other plumbing components. Its durable construction provides reliable performance and helps maintain stable system pressure for safer, smoother operation.

VEVOR 4.4 Gallon Thermal Expansion Tank, Expansion Tank for Water Heater, Heavy-Duty Carbon Steel Pressure Expansion Tanks for Residential Water Heaters, 3/4" NPT Connection

Model: ET-18LX
Web Code: 20258859
Sold and shipped by | 4.0 seller rating (530 reviews)

Sale ends: *

Available for deliveryAvailable online only

Delivery times vary by location. Most Marketplace items leave sellers' locations within 2 business days. Allow additional time for shipping.

Enjoy on orders from this seller.

Seller Return Policy

Read return policy

Warranty Information

Check with the manufacturer for details.

For Quebec residents: See the Availability Guarantee disclosure in the Specifications section below.

饾棧饾椏饾椉饾棻饾槀饾棸饾榿 饾棗饾棽饾榾饾棸饾椏饾椂饾椊饾榿饾椂饾椉饾椈

路 Reliable Water Supply Solution

Use this VEVOR expansion tank to help reduce pressure fluctuations and keeps your water heater and plumbing system running smoothly for reliable performance.

路 Constant Water Pressure

Maintains stable water flow throughout your hot water system for smooth and reliable everyday use.

路 Built to Last

Thickened carbon steel tank enhances strength and pressure resistance, providing reliable protection for long-term use in hot water systems.

路 Easy to Install

Designed for quick connection to your water heater system with a standard 3/4" NPT fitting, allowing for flexible and easy installation.

路 Stable Water Pressure

Helps regulate pressure fluctuations caused by thermal expansion, providing steady water pressure for reliable use.

路 Pre-Charge Pressure

Pre-charged to help maintain stable and reliable water pressure for everyday use.

饾棪饾椊饾棽饾棸饾椂饾棾饾椂饾棸饾棶饾榿饾椂饾椉饾椈饾榾

Item Model Number: ET-18LX

Capacity: 4.4 Gallon / 20 L

Pre-Charge Pressure: 29 PSI / 2 Bar

Maximum Internal Pressure: 116 PSI / 8 Bar

Maximum Temperature: 194掳F / 90掳C

Connection Size: 3/4" NPT

Main Material: Carbon Steel

Net Weight: 7.72 lbs / 3.5 kg

饾棧饾棶饾棸饾椄饾棶饾棿饾棽 饾棖饾椉饾椈饾榿饾棽饾椈饾榿

1 x Expansion Tank for Water Heater

1 x User Manual

路 Stable Water Pressure: This 4.4-gallon water heater expansion tank helps absorb excess pressure caused by thermal expansion, helping reduce pressure fluctuations and protect your water heater and plumbing system

路 4.4-Gallon Capacity: Measuring 10.94 x 10.94 x 14.57 in, this compact 4.4-gallon expansion tank provides reliable pressure regulation while taking up minimal installation space, ideal for residential water heater and plumbing system

路 Durable Construction: Built with thickened carbon steel for enhanced strength and durability, providing reliable resistance to pressure and deformation for long-lasting use

路 Easy to Install: Features a standard 3/4" NPT connection for quick installation into residential water heater systems. Not for drinking water use, do not connect to the public water supply system

路 Pre-Charged Expansion Tank: Pre-charged to 29 PSI to handle pressure changes in hot water systems, helping maintain stable pressure for smooth and reliable performance for everyday use

For Quebec residents 鈥撀燚isclosure under the Consumer Protection Act

In compliance with Bill 29, Best Buy and third-party sellers on Best Buy Marketplace do not guarantee the availability of replacement parts, repair services, or maintenance information for any products. Coverage provided through any Best Buy Protection programs and applicable manufacturer warranties, if any, remain in place. Please contact the manufacturer directly for information about their availability guarantee.

Shipping Charges

Free standard shipping on all orders.

Processing Time

Most items ship within 2 business days after an order is placed*. Allow additional time for shipping to your address.
*Please note: If an item you ordered becomes unavailable, you'll be notified and a full refund will be processed within 2 business days.

Shipping Area Restrictions

Shipping is not available in the following areas*:
  • No restrictions in Canada
*Please note: Shipping area restrictions may vary for large items. If an item can't be shipped to your address, we'll let you know during the checkout process.
Product Category
Small appliances, Personal care, and Grooming appliances
Return/Exchange Period
30 days
Condition
Opened