It’s not that easy to choose the right boiler expansion tank kit since there’s a ton of things you need to consider first. Some of the factors we paid attention to in our evaluation when reviewing the top boiler expansion tank kit on the market. Through our research, weve looked through catalogues to pick out the very best for you. Through our comparison table, in-detail reviews of each product, were going to reveal the name of our best boiler expansion tank kit on the marketbut dont skip to the end!
Best boiler expansion tank kit
1. HIGHCRAFT GUI37 Hydronic Expansion Tank for Heating System Carbon Steel Grey Holds 2.1 Gal, 2.1 Gallons, Gray
Feature
Hydronic Expansion Tanks Are Diaphragm Type Tanks Designed to Keep System Pressures Below Relief Valve SettingsHydronic (Forced Hot Water) Expansion Tanks Absorb the Expansion of Water in Residential or Commercial Hydronic Heating and Cooling Systems
Low Profile Tank Design with Full Membrane Depth Eliminates Stretching of Diaphragm, Providing Increased Life Cycle
Hydronic Non-Potable Expansion Tank for Closed Hot Water Heating Systems, Boilers
MIG Welding Eliminates Interior Rough Spots and Sharp Edges; High Grade Steel Construction; Made In Italy; Certified Synthetic SBR Rubber Diaphragm
Description
What is Hydronic Expansion?
Hydronic expansion tanks are diaphragm type tanks designed to keep system pressures below relief valve settings. Hydronic expansion tanks absorb the expansion of water in residential or commercial hydronic (forced hot water) heating and cooling systems. Without hydronic expansion tanks, the system will quickly over-pressurize resulting in added stress to the various system components. Hydronic expansion tanks protect safety valves from failing or wearing out quickly, avoids valve stem and ball seal leaks, prevents wasted BTUs and vastly extends water heater life.
Technical Features
- Certified synthetic SBR rubber diaphragm
- MIG welding eliminates interior rough spots and sharp edges
- Each tank is factory leak tested to ensure tank integrity
- All diaphragms designed to maximize drawdown
- External baked epoxy-polyester coating provides a durable appliance finish
- Welded side outlet allows easy and quick installation
- Protected pre charge valve eliminates potential leak path
- Low profile tank design with full membrane depth eliminates stretching of diaphragm, providing increased life cycle
Additional Description
- Shell: Carbon Steel
- Connection: Carbon Steel
- Diaphragm: SBR Synthetic Rubber
- Color: Gray
Operating Conditions
- Max. Operating Pressure: 75 PSI
- Operating Temperature: 210 Degrees Fahrenheit
- Factory Precharge: 12 PSI
- Warranty: 1 Year
Specifications
- Model Number: FTH15
- Tank Size: 2.1 Gallons
- Tank Weight: 4.6 Pounds
- Connection Size (National Pipe Thread): 1/2" Male Iron Pipe (MIP)
- Dimensions (LxWxH): 9" x 9" x 13"
- Acceptance Volume: 1.4 Gallons
- UPC Code: 80459513060
2. Amtrol T-5 THERM-X-SPAN Expansion Tank
Feature
Eliminates the waste of energy and water, thus saving moneyPrevents the relief valve from going off
Protects the water heater and Plumbing Fixtures from premauture failure
Prevents a dangerous pressure build-up in the system
3. AMTROL ST-5 Thermal Expansion Tank
Feature
Accepts expanded water caused by thermal expansionReturns water to the system when hot water is used
Prevents the relief valve from going off
Inline thermal expansion tank
Accepts expanded water caused by thermal expansion
Returns water to the system when hot water is used
Prevents dripping faucets, intermittent toilet fill and pressure relief valve discharge
Protects water heater, appliances and fixtures
4. Watts ETX-30 Non-Potable Water Expansion Tank 1/2 in MNPT Connection, 4.5 gallon, Gray
Feature
This non-portable water expansion tank is for closed loop hydronic heating system piping to control the thermal expansion of hot water and maintain system pressure below the relief sett of the relief valveThe carbon steel tank is pre-charged at 12 psi, has a 4.5 gallon volume, and features a durable expansion membrane preventing minimizes loss of the air change and ensures long and trouble-free life for the system
Made of carbon steel with epoxy finish, mounts to supply piping, with 1/2 inch MNPT system connection and .302-32 inch charging valve connection for on-site charging of the tank
Maximum pressure 60 psi and can be used in residential or commercial hydronic heating systems
Use in tandem with your hot water heater to absorb increased water volume ensuring long and trouble-free life for the system
5. Amtrol 60 Extrol Boiler System Expansion Tank, 7.4 gal Volume, 11" Diameter, 23" Height
Feature
1/2 nptm connection2.5 gallon max. Acceptance
100 psig maximum working pressure
6. Eastman 60022 60022/DET-5 2 Gallon Expansion Tank, White
Feature
RELIABLE PROTECTION: Eastman thermal expansion tanks are designed with quality to prevent hot water from backflowing into the cold water line, they also avoid pressure build-ups that can be dangerous for your water heaterDESIGN: This 2-gallon thermal expansion tank has a dimension of 12. 4-inches x 8. 3-inches and it's indicated for use in water heaters and boilers with a capacity of 30-gallons to 50-gallons
FACTORY PRECHARGED: The expansion tank is factory precharged at 40 psi, this setting can be adjusted during installation to match the water pressure of your home
DURABILITY: Manufactured with high-quality butyl rubber diaphragm and 304-stainless steel fittings for a long performance
QUALITY: Eastman backs the unparalleled operation of this product with years of experience in manufacturing plumbing products
CONNECTION: 3/4-inch MIP
7. Zilmet ZEP-1 Expansion Tank for Tankless Water Heater
8. Watts ETX-15 2.1-Gallon Non-Potable Expansion Tank for Hydronic Heating Systems
Feature
Designed to control hot water in closed loop heating systems.NPT male connection.
Durable
Easy to install
9. Watts HPX-C Boiler Trim Kit w/Check Valve, 1" NPT Air Separator, 2.1 Gal. Expansion Tank
Feature
Type: Boiler Trim KitConnection Type: NPT
Size: 1"
Tank Volume: 2.1 Gallons
10. HIGHCRAFT GUU34 Thermal Expansion Tanks-for Hot Water Heaters, Carbon Shell, Stainless Steel 3/4'' MIP Connection, Butyl Diaphragm, 150 PSI, 210 Degrees Fahrenheit, Almond Color, 4.8 Gallons
Feature
Thermal Expansion Tanks Are Used to Prevent Plumbing System And/or Water Heater Damage and Unnecessary Relief Valve Discharge Caused by Excessive Pressure from Thermal ExpansionPrevent Dangerous Pressure Build Up & Protect Household Appliances and Fixtures
External Baked Epoxy-Polyester Coating Provides a Durable Appliance Finish; Exclusive Polypropylene Liner Eliminates Internal Corrosion
Protect Safety Valves from Failing; Save Energy and Water
MIG Welding Eliminates Interior Rough Spots and Sharp Edges; High Grade Steel Construction; Made in Italy; All Tanks Are NSF61 Certified
