- Home Page /
- Tools & Home Improvement /
- Plumbing /
- Water Heaters & Parts /
- Water Heater Parts /
- Amtrol ST-12 Thermal Expansion Tank

The Amtrol THERM-X-TROL ST-12 Expansion Tank is designed to eliminate this problem by providing control of maximum pressures at a level below the relief valve setting. It also provides an additional space in the system to accommodate the increased volume of water created by thermal expansion, returning it to the system when hot water delivery is demanded
Amtrol ST-12 Thermal Expansion Tank
€ 109
Price Details
Excluding Shipping & Custom charges ( Shipping and custom charges will be calculated on checkout )
*All items will import from US
QTY:
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.
The Amtrol THERM-X-TROL ST-12 Expansion Tank is designed to eliminate this problem by providing control of maximum pressures at a level below the relief valve setting. It also provides an additional space in the system to accommodate the increased volume of water created by thermal expansion, returning it to the system when hot water delivery is demanded
Buy Now Pay Later
Fast
Shipping
Free
Return*
Secure Packaging
100% Original Products
PCI DSS Compliance
ISO 27001 Certified
What Stands Out
Product Details
- Amtrol ST-12 THERM-X-TROL Expansion Tank, 4.4 Gallon (141N43)
- Prevents wasted energy and water, saving money
- Eliminates relief valve activation
- Protects water heater and plumbing fixtures from premature failure
- Prevents dangerous pressure build-up in the system
- Designed to control maximum pressures at a level below relief valve setting
| Item Weight | 14 lbs (6.35 kg) |
Who Should Buy?
-
Homeowners
Ideal for homeowners installing a closed-loop water heating system to manage thermal expansion efficiently.
-
Plumbers
Perfect for professional plumbers who require reliable and effective thermal expansion solutions for clients.
-
Energy Efficiency Seekers
Great for users looking to enhance energy efficiency and prolong the lifespan of their water heating systems.
-
Small Apartments
Not suitable for small apartments with minimal hot water demand where expansion tank is unnecessary.
-
Low Budget Users
May not be ideal for users on a tight budget due to the initial investment costs involved.
-
DIY Enthusiasts
Not recommended for inexperienced DIYers who may struggle with proper installation and maintenance of systems.
Product Description
Amtrol ST-12 Thermal Expansion Tank
Product Buying Guide
The Amtrol ST-12 Thermal Expansion Tank is designed to address the issue of thermal expansion in domestic water systems, ensuring the efficient operation of water heaters and preventing potential safety hazards for homeowners. Its innovative design helps in saving energy and water, while protecting plumbing fixtures and the water heater from premature failure. With this buying guide, you can explore the product's specifications, key features, usage scenarios, competitors, user reviews, price analysis, and buying considerations to make an informed purchase decision.
Product Specifications
- 4.4 Gallon capacity
- Model: 141N43
- Designed to control maximum pressures in the water system
- Incorporates a space to accommodate increased water volume due to thermal expansion
Key Features
- Prevents relief valve from going off
- Protects water heater and plumbing fixtures
- Eliminates waste of energy and water
- Provides control of maximum pressures
Usage Scenarios
- Residential water heating systems
- Home plumbing systems
Usage Scenarios
Competitors offering similar thermal expansion tanks include [Competitor 1] and [Competitor 2], but Amtrol's ST-12 stands out due to its efficient pressure control and additional space to accommodate expanded water volume.
Some User Review
- Users appreciated the effective prevention of relief valve discharge, as it saved energy and reduced the risk of potential safety hazards.
- The control of maximum pressures offered by the expansion tank received positive feedback for its impact on water heater efficiency and longevity.
Competitors
The price range of the Amtrol ST-12 Thermal Expansion Tank is in line with the value it provides in terms of energy and water savings, as well as the protection it offers to the water heater and plumbing fixtures. It is competitively priced compared to similar products in the market.
Buying Considerations
- Ensure compatibility with the existing water heating system and plumbing fixtures
- Consider the space available for installation
Conclusion
The Amtrol ST-12 Thermal Expansion Tank is an essential addition to residential water heating systems, offering effective control of maximum pressures, energy and water savings, and protection for the water heater and plumbing fixtures. Its innovative design and positive user feedback make it a recommended choice for homeowners looking to address thermal expansion concerns in their water systems.
View LessThe Amtrol ST-12 Thermal Expansion Tank is designed to address the issue of thermal expansion in domestic water systems, ensuring the efficient operation of water heaters and preventing potential safety hazards for homeowners. Its innovative design helps in saving energy and water, while protecting plumbing fixtures and the water heater from premature failure. With this buying guide, you can explore the product's specifications, key features, usage scenarios, competitors, user reviews, price analysis, and buying considerations to make an informed purchase decision. Continue Reading
Customer Questions & Answers
-
Question:
What is the purpose of the Amtrol ST-12 Thermal Expansion Tank?
Answer: The Amtrol ST-12 Thermal Expansion Tank serves to manage excess pressure within a closed water heating system. Installed alongside your water heater, this tank absorbs the expanding hot water, preventing excessive pressure build-up that can lead to leaks or burst pipes. By maintaining a consistent pressure level, the tank helps to prolong the lifespan of your plumbing system and enhances overall efficiency. -
Question:
How does the Amtrol ST-12 Thermal Expansion Tank function?
Answer: This thermal expansion tank operates by utilizing a bladder that separates air and water. As water heats up, it expands, and the bladder compresses the air to accommodate this expansion. This dynamic balance prevents the build-up of pressure in your plumbing system. Understanding this function is crucial for homeowners, as it helps to prevent costly repairs associated with plumbing issues due to pressure spikes. -
Question:
What size of the system is the Amtrol ST-12 suitable for?
Answer: The Amtrol ST-12 is designed for residential water heating systems, generally recommended for systems with a capacity of up to 50 gallons. It’s ideal for standard home use, ensuring optimal performance for most water heaters. When selecting the right size, consider the volume of hot water your household consumes; this ensures effective thermal expansion management while maintaining system efficiency. -
Question:
Can I install the Amtrol ST-12 Thermal Expansion Tank myself?
Answer: Yes, the Amtrol ST-12 can be installed by a savvy DIYer with basic plumbing knowledge. It typically requires basic hand tools for installation and careful attention to the tank's orientation and plumbing connections. However, for best results and to ensure compliance with local codes, consulting with a professional plumber is advisable. This also guarantees that the system works correctly and safely to avoid any potential issues. -
Question:
What materials is the Amtrol ST-12 Thermal Expansion Tank made from?
Answer: The Amtrol ST-12 is constructed from high-quality steel with a protective coating to resist rust and corrosion, which enhances durability over time. The internal diaphragm is made of rubber for flexibility and resilience. This robust construction ensures that the tank remains functional under pressure and during temperature fluctuations, making it an excellent long-term addition to your water heating system. -
Question:
What are the signs that my thermal expansion tank needs replacing?
Answer: You may need to replace your Amtrol ST-12 if you notice leaking water, a frequently cycling water heater, or inconsistent water pressure in your fixtures. Another indication is the presence of water hammer noises when using hot water. Regular checks can help maintain system performance; however, recognizing these signs early can prevent more significant plumbing challenges from developing. -
Question:
How does the Amtrol ST-12 contribute to energy efficiency?
Answer: By regulating pressure in your plumbing system, the Amtrol ST-12 helps maintain optimal conditions for your water heater to operate efficiently. Reducing stress on plumbing components leads to lower energy consumption and fewer heat losses. Ultimately, this contributes to long-term savings on energy bills while promoting a more sustainable household environment. -
Question:
Is maintenance required for the Amtrol ST-12 Thermal Expansion Tank?
Answer: While the Amtrol ST-12 is designed for longevity, periodic maintenance is advisable to ensure optimal function. Regularly check the air pressure within the tank and make adjustments as needed, typically every few months. Additionally, a visual inspection for rust or corrosion can help catch issues early, thus maintaining the tank’s efficiency and prolonging its operational lifespan. -
Question:
Where can I buy the Amtrol ST-12 Thermal Expansion Tank in Ireland?
Answer: You can purchase the Amtrol ST-12 Thermal Expansion Tank from Ubuy, which offers a wide selection of home improvement products, including this thermal expansion tank. Ubuy provides a convenient online shopping experience, making it easy to find the right products for your plumbing needs. -
Question:
What should I consider before buying the Amtrol ST-12?
Answer: Before purchasing the Amtrol ST-12, consider the size and capacity of your water heating system, as well as the plumbing layout of your home. It’s important to assess whether you require a tank that accommodates your specific needs, including the expected volume of hot water usage. Additionally, reviewing customer feedback and installation requirements can offer valuable insights to ensure it’s the right fit for your system.
Amtrol Water Heater Parts Editorial Review
The Amtrol ST-12 Thermal Expansion Tank is a reliable choice for preventing pressure buildup in a hot water system. It is easy to install and has a larger capacity than most thermal expansion tanks. The useful leak check feature provides added peace of mind. Made in USA, this tank is a great investment for protecting your hot water heater. However, some users have reported issues with the included turbulator and potential cosmetic damage upon delivery. Please note that this item is non-returnable according to the seller's policy.
Customer Reviews & 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
- Easy to install
- Larger capacity than most thermal expansion tanks
- Useful leak check feature
- Made in USA
Cons
- Turbulator may not fit or be necessary for all installations
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.
€ 109
Order now and get it around Friday, July 10
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:
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.
Features & Benefits
- Eliminates the waste of energy and water, thus saving money
- Protects the water heater and plumbing fixtures from premature failure
- Prevents the relief valve from going off
- Prevents a dangerous pressure build-up in the system