Red Non-potable Water Expansion Vessels

Red Standard Expansion Vessels

Key features:
  • High quality Standard Expansion Vessels
  • Ideal for central heating systems
  • Various sizes available
  • Stops systems becoming over pressurised
From €26.59
Delivery in
2-3 Days
SKU
EV8L-x
Brand
My Building Supplies

Our red non-potable Expansion Vessels are a small tank used to protect closed (not open to atmospheric pressure) water heating systems and domestic hot water systems from excessive pressure.

The tank is partially filled with air, whose compressibility cushions shock caused by water hammer and absorbs excess water pressure caused by thermal expansion.

Expansion Vessels operate on the basis that the internal chamber is separated by a rubber membrane, inside this membrane sits the water and surrounding this sits a pocket of air.

As the water inside the sealed system is heated the water pressure increases, as water is non compressible the air inside the air chamber of the Expansion Vessel will become compressed thus leaving the system safe from over pressurisation.

As water can increase by 4.5% volume when heated from 0-100° C an Expansion Vessel is a vital part of any sealed heating system.

  • Absorbs excess water pressure
  • Ideal for central heating systems
  • Operates between -10°C and +100°C
  • Stops systems becoming over pressurised