Potterton Promax Ultra 24 Combi Expansion Vessel 8 Litre – Brand New or Refurbished | MPN 720753901

A heating system is only as reliable as the components keeping its pressure in check — and the Potterton Promax Ultra 24 Combi Expansion Vessel (MPN 720753901) is one of the most critical of them all. Every time your boiler fires up, water expands as it heats through the sealed circuit. This vessel absorbs that expansion quietly and continuously, preventing pressure spikes from placing destructive stress on your boiler's valves, seals, and heat exchangers.

Fitting directly into the Potterton Promax Ultra 24 Combi as a precise like-for-like replacement, this 8-litre vessel gets your system's pressure management back on track from the moment it's installed — with no modifications and no guesswork required.

• Potterton Promax Ultra 24 Combi Expansion Vessel
• Part Number: 720753901
• Available in Brand New or Refurbished condition
• Comes with 12-months warranty
• Compatible with Potterton Promax Ultra ERP boiler models
  
  GC Number:
  
  

  Model	GC Number
  Promax Ultra 24 Combi ERP (Serial No Ending AC)	47-393-54 AC
  Promax Ultra 24 Combi ERP (Serial No Ending BC & CC)	47-393-54 BC
  Promax Ultra 24 Combi ERP (Serial No Ending DC)	47-393-54 DC
  Promax Ultra 28 Combi ERP (Serial No Ending AC)	47-393-55 AC
  Promax Ultra 28 Combi ERP (Serial No Ending BC & CC)	47-393-55 BC
  Promax Ultra 28 Combi ERP (Serial No Ending DC)	47-393-55 DC
  Promax Ultra 33 Combi ERP (Serial No Ending AC)	47-393-56 AC
  Promax Ultra 33 Combi ERP (Serial No Ending BC & CC)	47-393-56 BC
  Promax Ultra 40 Combi ERP (Serial No Ending AC)	47-393-57 AC

  
  

  Delivery & Returns

  Orders placed before 3:00 PM are dispatched the same working day via trusted couriers, with both standard and next working day delivery options available at checkout. Returns accepted within 30 days, provided the part is unused and in its original packaging.
  
  Note: Please confirm that MPN 720753901 matches your existing part before placing your order. Installation must always be carried out by a Gas Safe registered engineer to ensure safety compliance and warranty validity.