- Home Page /
- Tools & Home Improvement /
- Plumbing /
- Water Heaters & Parts /
- Water Heater Parts /
- TTFLEX 2.1 Gallon Expansion Tank for Hot Wate...
0 ratings
Item #:
86379356
TTFLEX 2.1 Gallon Expansion Tank for Hot Water Heater 3/4" MNPT | Thermal Expansion Tank, for Potable Water, Lead-Free, CUPC Listed, Butyl Diaphragm,
Item #:
86379356
NAD 1022
Price Details
Excluding Shipping & Custom charges ( Shipping and custom charges will be calculated on checkout )
*All items will import from US
0 ratings
Write a review
In stock
Imported from USA store
QTY:
Order now and get it around Monday, September 21
Secured transaction
Ubuy works hard to protect your security and privacy. Our advanced payment security system ensures confidentiality by encrypting your information during transmission using AES (Advanced Encryption Standards) and SSL (Secure Socket Layer) protocols. Your payment details are 100% secure as we do not share your payment details with third party sellers.
Our Top Logistics Partners
The TT FLEX water expansion tank's generous 4.5-gallon capacity allows for efficient thermal expansion management without taking up too much space.
Fast
Shipping
Free
Return*
Secure Packaging
100% Original Products
PCI DSS Compliance
ISO 27001 Certified
Note: Step Down Voltage Transformer required for using electronics products of US store (110-120). Recommended power converters Buy Now.
What Stands Out
Compact Design
The 4.5-gallon size fits easily into tight spaces, making it ideal for homes with limited installation areas while still providing efficient pressure management for water heaters.
Durable Construction
Built with high-quality materials for longevity, this thermal expansion tank ensures reliable performance and withstands high temperatures, setting it apart from standard tanks in the market.
Easy Installation
Featuring a 3/4 inch MNPT connection, this tank simplifies installation and is compatible with most water heating systems, reducing labor costs and time for homeowners.
Product Details
| Special Features | Rustproof |
| Mount Type | portable |
| Capacity | 2.1 gallons |
| Item Weight | 5.3 pounds (2.4 kg) |
| Color | White Or Off-white |
| Style Name | Modern |
| Material Type | Plastic |
| Brand Name | TT FLEX |
| Model Number | 2.1 Gallon |
| Number of Items | 1 |
| Manufacturer | TT FLEX |
| UPC | 768564454065 |
| Manufacturer Part Number | TTET21G |
| Brand | TT FLEX |
| Special Feature | Rustproof |
| Material | Plastic |
Who Should Buy?
-
Homeowners
Ideal for homeowners needing an expansion tank to protect their water heater from pressure build-up.
-
DIY Enthusiasts
Great for DIY enthusiasts who are comfortable installing and maintaining water heater components.
-
Small Households
Perfect for small households needing efficient and reliable hot water management without excess capacity.
-
Large Families
Not suitable for larger families requiring significant hot water capacity beyond 4.5 gallons.
Product Description
TTFLEX 2.1 Gallon Expansion Tank for Hot Water Heater 3/4" MNPT | Thermal Expansion Tank, for Potable Water, Lead-Free, CUPC Listed, Butyl Diaphragm, Corrosion Resistant Finish, Easy Install
Have any Query? Chat with us
Customer Questions & Answers
-
Question:
What is the purpose of a thermal expansion tank?
Answer: A thermal expansion tank is designed to absorb excess pressure that builds up in hot water systems due to thermal expansion. When water is heated, it expands, which can lead to high pressure and potential system damage. By installing an expansion tank like the TTFLEX 2.1 Gallon model, you can protect your plumbing system and water heater from excessive pressure, ensuring a longer lifespan and efficient operation. -
Question:
How is the TTFLEX expansion tank installed?
Answer: Installing the TTFLEX expansion tank is straightforward, as it is designed for easy installation with 3/4" MNPT connections. Simply connect it to the cold water supply line in your hot water system. The process typically requires basic plumbing tools and can be completed in a matter of minutes, making it a great DIY project for homeowners looking to enhance their water heating system. -
Question:
Is the TTFLEX expansion tank safe for potable water?
Answer: Yes, the TTFLEX expansion tank is specifically designed for potable water applications. It is lead-free and CUPC listed, ensuring that it meets the necessary safety standards for drinking water. The butyl diaphragm used in the tank helps maintain water quality, making it a safe choice for any home or commercial setup. -
Question:
What materials are used in the construction of the TTFLEX expansion tank?
Answer: The TTFLEX expansion tank is constructed with a corrosion-resistant finish, which enhances its durability and longevity. Its internal butyl diaphragm provides excellent performance in high-temperature scenarios. These materials help prevent rust and other harmful deposits, making it ideal for harsh environments typically found in water heating systems. -
Question:
What size is the TTFLEX expansion tank, and is it suitable for my system?
Answer: The TTFLEX expansion tank has a capacity of 2.1 gallons, which is suitable for most household water heaters typically rated up to 50 gallons. This capacity helps accommodate typical thermal expansion in home systems, making it a versatile choice for various residential setups. If you have a larger water heater, it's essential to consider larger capacity tanks. -
Question:
How does the butyl diaphragm work in the TTFLEX expansion tank?
Answer: The butyl diaphragm in the TTFLEX expansion tank acts as a barrier separating the water from the air in the tank. As water expands when heated, the diaphragm flexes, allowing excess pressure to be absorbed and thereby stabilizing the overall pressure in your water heating system. This mechanism helps prevent water hammer and extends the life of your water heater. -
Question:
What is CUPC certification, and why is it important?
Answer: CUPC certification, or the Canadian Uniform Plumbing Code certification, indicates that the TTFLEX expansion tank meets rigorous safety and quality standards for plumbing products. This certification is crucial for ensuring that the tank is safe for potable water use and complies with plumbing regulations, providing peace of mind for homeowners and contractors alike. -
Question:
Can I use the TTFLEX expansion tank in a solar water heating system?
Answer: While the TTFLEX expansion tank is primarily designed for traditional hot water systems, it can also be used in solar water heating applications. It's essential to ensure that your solar system's operating temperatures and pressures are within the tank's specifications. This versatility makes it a great option for eco-friendly heating solutions. -
Question:
Where can I buy the TTFLEX 2.1 Gallon Expansion Tank in Namibia?
Answer: You can purchase the TTFLEX 2.1 Gallon Expansion Tank from Ubuy. Ubuy offers a wide range of home improvement products, including plumbing accessories, making it a convenient choice for online shopping in Namibia.
TT FLEX Water Heater Parts 2.1 Gallon Editorial Review
The Potable Thermal Expansion Tank for water heaters with a 2.1-gallon capacity and a 3/4 inch MNPT connection has received mixed reviews from users. Some customers found it to be a perfect solution to issues like fluctuating water pressure caused by rust and dirt buildup in their old tanks. They appreciated the cost savings achieved by purchasing and installing the tank themselves, with one customer mentioning how easy the installation process was. However, other users faced problems with the tank, such as it failing and causing black particles to appear in their faucets. One customer expressed concern about the quality of the tank meeting local building codes and decided to avoid using it in future Constructions. Overall, feedback on this tank is somewhat polarized, with some users finding it to be a great replacement that functions as intended, while others experienced issues with its performance and quality control. **
Customer Reviews & Ratings
1 customers ratings
-
5 Star
100%
-
4 Star
0%
-
3 Star
0%
-
2 Star
0%
-
1 Star
0%
Review this product
Share your thoughts with other customers
Pros
- Affordable option compared to hiring a plumber for installation
- Easy to install with clear manufacturer's instructions
Cons
- Potential for the tank to fail and introduce black particles into the water supply
Platform Trust & Buyer Confidence
JK
Jasmin
Verified buyer
“Great products and very good service: very easy and very fast international delivery.”
9 September 2026 · via Trustpilot
AG
Anke
Verified buyer
“Wonderful online shopping experience, smooth transaction from the start. Payment method works conveniently and delivery is unexpectedly fast and reliable. You go the extra mile for service. What makes this even more amazing, you deliver to Namibia. I will remain a happy Ubuy customer and will increase my purchases for sure! Thank you!”
10 September 2026 · via Trustpilot
H
Hazel
Verified buyer
“Very easy to find the products what you need, and so fast delivery, that’s why I highly recommended to others costumers to used ubuy.”
10 September 2026 · via Trustpilot
O
Opaleye
Verified buyer
“I received exactly what I ordered I was skeptical about your site because that was my first time to order. But the order came timely and neatly packaged. I was not disappointed. Thank you.”
11 September 2026 · via Trustpilot
AC
Adele
Verified buyer
“Easy to find and order what you want on the website. Delivery is quick to the UK”
8 September 2026 · via Trustpilot
Secure Checkout
Global Delivery
Easy Returns
Genuine Products
Product Price History
Important information
- Limitations : For products shipped internationally, please note that any manufacturer warranty may not be valid; manufacturer service options may not be available; product manuals, instructions, and safety warnings may not be in destination country languages; the products (and accompanying materials) may not be designed in accordance with destination country standards, specifications, and labeling requirements; and the products may not conform to destination country voltage and other electrical standards (requiring use of an adapter or converter if appropriate). The recipient is responsible for assuring that the product can be lawfully imported to the destination country. When ordering from Ubuy or its affiliates, the recipient is the importer of record and must comply with all laws and regulations of the destination country.
- Not all the products listed on Ubuy are for sale, as Ubuy is a global search engine. Products are subject to export/trade regulations.
NAD 1022
Order now and get it around Monday, September 21
This item is not restrict in my country.(Please click on above link if this item is not restrict in your country, So our team will review and allow.)
QTY:
Secured transaction
PCI DSS compliant and ISO 27001:2022 certified, with encrypted payments and full buyer protection on every order.
Our Top Logistics Partners
Fastest cross-border delivery
Features & Benefits
- Efficient thermal expansion management with a 4.5-gallon capacity.
- Compact design ideal for smaller heating or cooling systems.
- Quick and easy installation for professionals and DIY enthusiasts.
- Durable appliance-quality finish prevents corrosion and rust.
- Aesthetically pleasing look enhances overall system appearance.
- Prevents relief valve activation, returning water to the system when used.
Ubuy Assurance
Experience worry-free shopping with 100% original products, PCI DSS-compliant payment security, ISO 27001-certified data protection, the fastest cross-border delivery, free returns *, and secure packaging on every order.