Potterton Combi 25 Expansion Vessel 7 Litre + PRV – MPN 7683801 & 768397625 Expansion Vessel 7L 7683801 + PRV 7683976

A boiler under pressure — literally — needs the right components to keep it safe. The Potterton Combi 25 Expansion Vessel 7 Litre (MPN 7683801) paired with the Pressure Relief Valve (MPN 7683976) forms a complete pressure management solution for your heating system. Where the expansion vessel absorbs the thermal expansion of water as it heats up, the PRV acts as the final line of defence — releasing any dangerous pressure build-up before it can cause serious damage to your boiler's internal components.

Sold together as a matched set, these two genuine Potterton parts work in harmony to ensure your system operates safely, efficiently, and within its designed pressure parameters at all times.

• Part Number: 7683801 (Expansion Vessel) & 7683976 (PRV)
• Capacity: 7 Litres
• Available in Brand New or Seller Refurbished condition
• Comes with 12 months warranty
• Compatible with Potterton Combi and System boiler models
• SKU: EXP-2063-A-BC

Compatible Boilers

Combi Series

System Series

Quality You Can Count On — Whatever the Condition

Each set dispatched is either brand new or seller refurbished — and either way, you're getting a part that's been fully tested and cleared for installation. Seller refurbished units are professionally restored to full working order and held to the same performance standards as new stock. Whichever condition you receive, it arrives backed by a 12-month warranty and ready to perform from day one.

Delivery & Returns

Order before 3:00 PM for same-day dispatch. Returns accepted within 30 days, provided the part is unused and in its original packaging.

Note : Before ordering, please confirm that part numbers 7683801 and 7683976 match your existing components. Installation must always be carried out by a Gas Safe registered engineer to ensure safety compliance and warranty validity.