Baxi 105E Pressure Differential Valve-Fits Combi 80/105 Boilers

This Baxi 105e pressure differential valve helps regulate and balance water pressure/flow within the boiler’s hydraulic circuit to support stable operation. If the valve is sticking or worn, you may notice poor circulation symptoms, intermittent heating performance, unusual boiler behaviour, or recurring lockouts linked to flow/pressure issues. Replacing it with the correct 7224342 valve helps restore correct hydraulic performance and reduces the risk of repeat faults.

Compatibility :

• Combi: 105E, 105HE, 80 Eco, 80 Maxflue, 80E

Important fitting advice

We recommend that all parts are fitted by a fully qualified Gas Safe registered engineer. If you need help confirming the right part, contact us our team has 10+ years of boiler spares knowledge and friendly chat support to help you quickly.

Delivery

At Boiler Spares Hub, we dispatch orders within 1 working day (Monday-Friday). Orders placed outside working days will be dispatched on the next working day. For delivery options available for this product, please add it to your basket or check our delivery options page.

Returns

We accept 30-day returns. Returns must be in an unopened, sealed box. If we find the item has been used or installation was attempted, we may refuse the return.

Frequently Asked Questions (FAQ’s)

1.  What is Baxi 7224342?
A pressure differential valve used in selected Baxi Combi boilers to help manage differential pressure/flow within the hydraulic circuit.

2. What does a pressure differential valve do in a boiler?
It helps maintain stable circulation conditions by controlling pressure difference across parts of the system, supporting consistent heating performance.

3. What symptoms can a faulty PDV cause?
Unstable heating performance, circulation-related issues, unusual boiler behaviour, or intermittent lockouts associated with flow/pressure problems.

4. Which boilers does it fit?
Baxi Combi: 105E, 105HE, 80 Eco, 80 Maxflue, 80E (see GC numbers above).

5. How do I confirm I need 7224342?
Match your boiler model/GC No. and confirm the part number 7224342 in the boiler parts list/diagram.