Expansion Tanks, Pressure Tanks & Water System Tanks
Shop expansion tanks and pressure tanks for plumbing, hydronic heating, water heater and well water applications. MasterBuilder Mercantile carries thermal expansion tanks, hydronic expansion tanks, well pressure tanks and related water system components from leading manufacturers including Flexcon, Bell & Gossett and other commercial plumbing and HVAC brands.
Expansion and pressure tanks perform different functions depending on the system. Thermal and hydronic expansion tanks accommodate changes in fluid volume as temperature changes, while well pressure tanks store pressurized water and help manage pump cycling in compatible water systems.
Water Heater Expansion Tanks
Water heater expansion tanks are used in compatible closed plumbing systems to accommodate the increase in water volume that occurs as water is heated. Providing space for thermal expansion helps prevent the expanding water from unnecessarily increasing pressure throughout the plumbing system.
Expansion tank sizing should consider water heater capacity, supply pressure, operating temperature and the manufacturer's published sizing requirements.
Hydronic Expansion Tanks
Hydronic expansion tanks are used in closed-loop heating and mechanical systems to accommodate changes in fluid volume as system temperature rises and falls. They are an important component of properly designed boiler and hydronic heating systems.
Available configurations and capacities vary according to system size and application. Tank selection should be based on system volume, operating temperatures, pressures and manufacturer sizing information.
Well Pressure Tanks
Well pressure tanks are used with compatible well pumps and water systems to store pressurized water and help reduce unnecessary pump cycling. Pressure tanks are available in multiple capacities and configurations for residential, commercial and other water system applications.
When selecting a replacement well pressure tank, verify the existing tank capacity, connection requirements, pressure settings and system specifications.
Pressure Tank Tee Kits & Accessories
Pressure tank installations may require tank tees, pressure switches, gauges, relief valves and other accessories used to connect and control the water system. Tank tee kits can combine several of these components into an installation package for compatible pressure tank systems.
Verify pipe size, connection requirements, pressure ratings and compatibility with the pressure tank and water system before selecting a tank tee or accessory kit.
Flexcon Expansion & Pressure Tanks
MasterBuilder Mercantile carries a broad selection of Flexcon tanks for well water, thermal expansion and hydronic applications. Available product families include WELL-RITE, FLEX-LITE, PRO-LITE, Jet-Rite and other Flexcon tank systems.
Our expansion tank selection also includes Bell & Gossett products for compatible hydronic and mechanical applications. Available models vary by capacity, configuration and system requirements.
Choosing the Correct Expansion or Pressure Tank
The correct tank depends first on the application. Water heater expansion tanks, hydronic expansion tanks and well pressure tanks perform different functions and should be selected according to the requirements of the specific plumbing or mechanical system.
Before ordering, verify the application, tank capacity, connection size, operating pressure, temperature requirements and manufacturer specifications. For replacement applications, matching the existing manufacturer model and specifications is generally the best starting point.
Shop Expansion Tanks & Pressure Tanks Online
MasterBuilder Mercantile supplies expansion tanks, pressure tanks and water system components to contractors, facilities and customers throughout Canada and the United States. Browse the collection above by application, manufacturer, tank size and model to find the appropriate tank for your system.
