Vaillant Expansion Vessels

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Vaillant Expansion Vessels

Vaillant Expansion Vessels in the boilers are to ensure that the pressure within the boiler operates within safe parameters normally between 1 to 2.5 bar. The expansion vessel should be half full of air and half full of water both separated by a rubber diaphragm. The common problem customer’s encounter when the Vaillant expansion vessel is faulty is the boiler pressure builds to 3 bar and hot water starts to dribble through the pressure relief valve and outside via the discharge pipe.

When the boiler then cools down the pressure in the boiler falls to 0 bar and won?t start. The customer then has to fill their boiler back up by using the filling loop normally located below the boiler. Once the pressure in the boiler is back at 1 -1.5bar the boiler will start to work again. stock a wide range of Genuine Vaillant Heating Spares and Vaillant Boiler Parts. They include Aqua Sensors, Auto Air Vents, Diverter Valves, Actuator Motors, Pumps, Gas Valves, Printed Circuit Boards (PCB), Sensors, DHW Heat Exchangers, Thermistors, Pressure Relief Valves (PRV), Fan Proving Switches, Pressure Gauges, Time Clocks, Programmers, Micro Switches, Condensing Collectors, Filling Valve, Manifolds, Diaphragms, Thermostats, Filling Keys, Gaskets, Display Boards, Vaillant Expansion Vessels, Flanges, Wiring Harnesses, Cable Tree, Electrodes, Magnetos, Controls Knobs, Burners, Water Valves, Flues, Pipes, Venturi, Washers, Clips, Seals, O Rings, Cartridges, Non Return Valves, Service Kits, Fuses, Potentiometers, Springs, Service Cocks, 3 Port Valves, Water Pressure Switches, Siphons, Door Seals, Condensate Traps, Drain Cocks, Flexible Tubes, Air Inlet Ducts and many more.

Below are some of the Vaillant Boiler Spare Parts we specialise in:

  • VCW Sine 18 – VCW 242E/282E
  • Combicompact – Thermocompact, Thermocompact Plus, Turbomax
  • Turbomax Pro 24 and Pro 28
  • Turbomax Plus 824,828, aqua Plus
  • Ecomax 824/828, 824/2E/828/2E- ecomax Pro
  • ecoTEC Pro 24/Pro28, EcoTEC Plus 831/837/937
  • ecoTEC System 612/615/618/624/630/637
  • ecoTEC Plus 415/418/428/438
  • EcoTeC Exclusive 832/838
  • And many other products…, stockist of genuine Vaillant Expansion Vessels