Baxi Boiler 105E Hydraulic Venturi Assembly Replacement Part

This Baxi 105e hydraulic venturi assembly 248051 helps the boiler’s hydraulic system regulate flow/pressure signals so the unit can operate correctly. When the venturi or its ports block or wear, you may see hot water/heat cutting out, weak or inconsistent DHW performance, and nuisance lockouts; replacing with the correct venturi assembly is a reliable fix that restores stable operation and reduces shutdown risk.

Compatibility :

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

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 does a hydraulic venturi do in a Baxi 105E?
It supports correct hydraulic sensing/flow control so the boiler can run safely and consistently.

2. Common symptoms of a faulty/blocked venturi assembly?
Intermittent hot water, heating cutting out, inconsistent performance, or nuisance lockouts.

3. Is this part the same as a diverter valve?
No-this is a hydraulic venturi assembly, not a diverter valve cartridge.

4. How do I confirm compatibility?
Match your boiler model name to the series list and confirm using the GC number/boiler data badge.

5. Can I install it myself?
Best fitted by a qualified heating engineer to avoid leaks and ensure correct system operation.