Ideal 177540 Expansion Vessel Kit | Replacement Spare Part
- SKU
- EDDIDEALGAS06
Electrical Deals Direct stock a wide variety of spares and accessories for your needs. Whether you're looking for replacements or upgrades, we have you covered. For more details or assistance, feel free to call one of our knowledgeable team members on 01934 253600 or email us - [email protected]. We're here to help!
Our Expert's Opinion
"Crucial for maintaining the safe and efficient operation of Ideal and Keston boilers by managing system pressure and accommodating thermal expansion."Ideal 177540 Expansion Vessel Kit
Effective pressure management is essential for the reliability and safety of any sealed heating system. The expansion vessel contains a flexible internal diaphragm that separates system water from a pre-charged air chamber; as pressure rises, the diaphragm compresses, absorbing expansion and stabilising system pressure. Without a properly functioning expansion vessel, pressure can rise rapidly, leading to frequent activation of the safety relief valve, water loss, and repeated need for system repressurisation. Persistent over-pressurisation can also accelerate wear on components such as pumps, heat exchangers, and seals.
Over time, expansion vessels can lose their air charge or suffer diaphragm fatigue, reducing their ability to absorb pressure changes effectively. This often presents as rising system pressure when the boiler heats, pressure dropping when the system cools, or regular discharge from the safety valve. Replacing a weakened or failed expansion vessel with this kit restores proper pressure control, improves system stability, and helps prevent unnecessary breakdowns or call-outs. Because correct charging and secure installation are critical to performance and safety, fitting should always be carried out by a qualified heating engineer, who will ensure the vessel is correctly pressurised and integrated into the system.
Electrical Deals Direct now sells a wide range of spare parts. If you cannot see the item you require on our website, please call 01934 253600 or email [email protected] for more information.
| MPN | 177540 |
|---|---|
| Product Code | EDDIDEALGAS06 |
| Part Origin | Compatible |
| Part or Accessory? | Part |
| Brand | Ideal |
Delivery Information -
Standard delivery for all orders over £150 ex-VAT are free of charge.
If we can speed this up, we will, but you can also select Express Delivery when you check out and get your purchase more quickly (usually the next working day, subject to a 1pm cut-off): there is an extra charge for this ranging from £5 to £29.99 depending on the products you are buying.
We partner with several of the best UK carriers (such as TNT, Royal Mail, DPD etc) depending on the type of product and the warehouse it is coming from, and also with some pallet companies for larger items. All of these operate during normal Monday – Friday working hours, and we expect all deliveries to arrive in 5 days. For more details checkout this page.
Gledhill Cylinders – Delivery Charge -
For all Gledhill Cylinders, a flat delivery charge of £33.00 (ex-VAT) applies, regardless of order value or delivery method. This will be added automatically at checkout.
Returns Information -
Having to return a product because it doesn’t fit, or is not what you wanted, is really annoying! To try and make sure this isn’t necessary we have lots of helpful advice on our site, and you should feel free to call our experts on the number above to check if you are in any doubt at all – we’re always happy to help.
But if you do, don’t worry, just contact us and we’ll get it sorted (note that for trade customers there may be a restocking fee). If you need it, we can usually arrange the carrier to pick it up.
For full details of our policy, check out the small print here.
Ideal 177540 Expansion Vessel Kit
Effective pressure management is essential for the reliability and safety of any sealed heating system. The expansion vessel contains a flexible internal diaphragm that separates system water from a pre-charged air chamber; as pressure rises, the diaphragm compresses, absorbing expansion and stabilising system pressure. Without a properly functioning expansion vessel, pressure can rise rapidly, leading to frequent activation of the safety relief valve, water loss, and repeated need for system repressurisation. Persistent over-pressurisation can also accelerate wear on components such as pumps, heat exchangers, and seals.
Over time, expansion vessels can lose their air charge or suffer diaphragm fatigue, reducing their ability to absorb pressure changes effectively. This often presents as rising system pressure when the boiler heats, pressure dropping when the system cools, or regular discharge from the safety valve. Replacing a weakened or failed expansion vessel with this kit restores proper pressure control, improves system stability, and helps prevent unnecessary breakdowns or call-outs. Because correct charging and secure installation are critical to performance and safety, fitting should always be carried out by a qualified heating engineer, who will ensure the vessel is correctly pressurised and integrated into the system.
Electrical Deals Direct now sells a wide range of spare parts. If you cannot see the item you require on our website, please call 01934 253600 or email [email protected] for more information.
| MPN | 177540 |
|---|---|
| Product Code | EDDIDEALGAS06 |
| Part Origin | Compatible |
| Part or Accessory? | Part |
| Brand | Ideal |
Delivery Information -
Standard delivery for all orders over £150 ex-VAT are free of charge.
If we can speed this up, we will, but you can also select Express Delivery when you check out and get your purchase more quickly (usually the next working day, subject to a 1pm cut-off): there is an extra charge for this ranging from £5 to £29.99 depending on the products you are buying.
We partner with several of the best UK carriers (such as TNT, Royal Mail, DPD etc) depending on the type of product and the warehouse it is coming from, and also with some pallet companies for larger items. All of these operate during normal Monday – Friday working hours, and we expect all deliveries to arrive in 5 days. For more details checkout this page.
Gledhill Cylinders – Delivery Charge -
For all Gledhill Cylinders, a flat delivery charge of £33.00 (ex-VAT) applies, regardless of order value or delivery method. This will be added automatically at checkout.
Returns Information -
Having to return a product because it doesn’t fit, or is not what you wanted, is really annoying! To try and make sure this isn’t necessary we have lots of helpful advice on our site, and you should feel free to call our experts on the number above to check if you are in any doubt at all – we’re always happy to help.
But if you do, don’t worry, just contact us and we’ll get it sorted (note that for trade customers there may be a restocking fee). If you need it, we can usually arrange the carrier to pick it up.
For full details of our policy, check out the small print here.
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