The 10 Best Expansion Tank For Hot Water Tank

WATTS WATER TECHNOLOGIES GIDDS-1030401 Potable Water Expansion Tank, Model #Plt-5, Stainless Steel Nipple, 2.1 Gallon, Lead Free

Tank tee – expansion tank installation device allows quick and easy attachment of an expansion tank to the water heater with push-to-fit technology. No tools are needed except pipe thread sealing tape.

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 BTU’s 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: 60 PSI
• Operating Temperature: 210 Degrees Fahrenheit
• Factory Precharge: 12 PSI
• Warranty: 1 Year

Specifications

• Model Number: FTH30
• Tank Size: 4.8 Gallons
• Tank Weight: 6.8 Pounds
• Connection Size (National Pipe Thread): 1/2" Male Iron Pipe (MIP)
• Dimensions (LxWxH): 12" x 12" x 16"
• Acceptance Volume: 3.0 Gallons
• UPC Code: 80459513075

What is Thermal Expansion?
When heated, water expands. Under normal circumstances, a 40 Gallons hot water heater creates roughly an additional half gallon of water when heated (with no demand). In the past this expanded water would flow back into the public water supply. However, in many countries, where applicable by code, a backflow preventer is required, creating a closed system and a new problem as this extra half gallon of water is not compressible. When an expansion tank is installed the excess water enters the pre-pressurized tank. As the temperature and pressure reaches its maximum, the diaphragm flexes against an air cushion (air is compressible) to allow for increased water expansion. When the system is opened again or the water cools, the water leaves the tank and returns to the system.

Potential Problems Without an Expansion Tank

• Premature failure of the water heater may void the warranty of the water heater
• Dangerous high pressure
• leaky fittings and valves
• collapsed center flues
• flames out of combustion chamber
• Unnecessary Relief Valve Discharge

Installation Options for Thermal Expansion Tanks

• Install on the cold water side after the pressure reducing valve and between the backflow preventer and the water heater
• Do not install in an area where leakage could cause property damage
• The tank can be installed either vertically or horizontally. However, if the tank is to be installed horizontally, then it must be fully supported independent from the piping. Failure to do so will void the warranty.

Technical Features

• All tanks are NSF61 Certified
• MIG welding eliminates interior rough spots and sharp edges
• Each tank is factory leak tested
• 150 PSI Max pressure rating
• External baked epoxy-polyester coating provides a durable appliance finish
• Exclusive polypropylene liner eliminates internal corrosion
• Protected precharge valve eliminates potential leak path

Material Description

• Shell: Carbon Steel
• Connection: Stainless steel
• Diaphragm: Butyl
• Color: Almond

Operating Conditions

• Max. Operating Pressure: 150 PSI
• Operating Temperature: 210 Degrees Fahrenheit
• Factory Precharge: 40 PSI
• Warranty: 1 Year

Specifications

• Model Number: FTT12
• Tank Size: 4.8 Gallons
• Tank Weight: 10 Pounds
• Connection Size (National Pipe Thread): 3/4" Male Iron Pipe (MIP)
• Dimensions (LxWxH): 16" x 11" x 11"
• Acceptance Volume: 3.3 Gallons
• UPC Code: 80459513078

Blue Duda Solar Expansion tanks are constructed with a food grade EPDM diaphragm for potable water applications. These should be used for relieving pressure from building up in the domestic water tank as it heats from the solar loop. Use of an expansion tank helps regulate the pressure so that it does not get too high in the tank and cause water loss due to the T/P valve opening when the pressure of the water exceeds the limit. The difference in water density from cold (4°C) to near boiling (99°C) is approximately 4%. For maximum expansion capabilities, your expansion tank capacity should be 4% the size of your water heater. ie: A 300 liter tank should have a 12L expansion tank. Expansion tanks are also very useful in well pump applications. In order to avoid the pump turning off and on constantly, an expansion tank of adequate size should be placed in line to receive a hold water. When the tap is opened, the expansion tank will push out water using the pressure created by the air inside of it. The well pump will only need to turn back on when most of the expansion tank is empty and the water pressure has dropped below the minimum pressure threshold.

Product Description

WATTS WATER TECHNOLOGIES GIDDS-1030402 Watts Potable Water Expansion Tank, Model #Plt-12, Stainless Steel Nipple, 4.5 Gallon, Lead Free – 1030402

From the Manufacturer

Series PLT Potable Water Expansion Tanks are designed to absorb the increased volume of water created by thermal expansion and to maintain balanced pressure throughout the potable water supply system. Series PLT tanks feature a pre-pressurized steel tank with an expansion membrane that prevents contact of the water with the air in the tank. This prevents loss of air to the water and ensures long and trouble-free life for the system. These tanks may be used with all types of Direct Fired Hot Water Heaters (gas, oil or electric) and hot water storage tanks. IAPMO listed and ANSI/NSF 61 certified. Maximum Pressure: 150psi (10 bar)

Blue Duda Solar Expansion tanks are constructed with a food grade EPDM diaphragm for potable water applications. These should be used for relieving pressure from building up in the domestic water tank as it heats from the solar loop. Use of an expansion tank helps regulate the pressure so that it does not get too high in the tank and cause water loss due to the T/P valve opening when the pressure of the water exceeds the limit. The difference in water density from cold (4°C) to near boiling (99°C) is approximately 4%. For maximum expansion capabilities, your expansion tank capacity should be 4% the size of your water heater. ie: A 300 liter tank should have a 12L expansion tank. Expansion tanks are also very useful in well pump applications. In order to avoid the pump turning off and on constantly, an expansion tank of adequate size should be placed in line to receive a hold water. When the tap is opened, the expansion tank will push out water using the pressure created by the air inside of it. The well pump will only need to turn back on when most of the expansion tank is empty and the water pressure has dropped below the minimum pressure threshold.

Blue Duda Solar Expansion tanks are constructed with a food grade EPDM diaphragm for potable water applications. These should be used for relieving pressure from building up in the domestic water tank as it heats from the solar loop. Use of an expansion tank helps regulate the pressure so that it does not get too high in the tank and cause water loss due to the T/P valve opening when the pressure of the water exceeds the limit. The difference in water density from cold (4°C) to near boiling (99°C) is approximately 4%. For maximum expansion capabilities, your expansion tank capacity should be 4% the size of your water heater. ie: A 300 liter tank should have a 12L expansion tank. Expansion tanks are also very useful in well pump applications. In order to avoid the pump turning off and on constantly, an expansion tank of adequate size should be placed in line to receive a hold water. When the tap is opened, the expansion tank will push out water using the pressure created by the air inside of it. The well pump will only need to turn back on when most of the expansion tank is empty and the water pressure has dropped below the minimum pressure threshold.

Utilitech 2-Gallon Expansion Pressure TankItem #: 160680 |Model #: LET-2Diphragm tank features: Easy installation, No Mainteance, 100PSI maximum working pressure. Company 5 year warranty

Conclusion

By our suggestions above, we hope that you can found expansion tank for hot water tank for you.Please don’t forget to share your experience by comment in this post. Thank you!