Expansion Vessel 8L For Alpha Boiler 1.039285

This alpha e-tec 28 expansion vessel 8l helps manage pressure changes as the heating water expands and contracts, keeping the system stable. Over time, the internal diaphragm can weaken or lose charge, which can cause pressure to rise when heating, drop when cooling, or trigger the PRV discharge. Replacing the correct vessel restores proper pressure control and helps reduce nuisance lockouts and repeat re-pressurizing.

Compatibility :

• Expansion Vessel

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 (FAQs)

1. What does an alpha expansion vessel 8l do?
It absorbs pressure increases as the system heats up, helping keep boiler pressure stable.

2. Signs my Alpha expansion vessel is faulty?
Pressure rising too high when heating, dropping when cold, PRV pipe dripping outside, frequent topping up, or lockouts.

3. Will a faulty expansion vessel cause pressure loss?
Yes often indirectly: it can trigger the PRV to discharge, and later the system pressure keeps dropping.

4. Is part 1.039285 correct for Alpha E-Tec 28?
Yes 1.039285 is listed for the Alpha expansion vessel application.

5. Do I need an engineer to fit it?
Boiler parts should be fitted safely use a qualified heating engineer.