Ideal 176865 Expansion Vessel Kit | Genuine Replacement Spare Part
- SKU
- EDDIDEALGAS71
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
"A component that helps stabilise central heating system pressure by absorbing excess water expansion."Ideal 176865 Expansion Vessel Kit
The Ideal 176865 Expansion Vessel Kit is a replacement part designed to manage the natural increase in water volume and pressure that occurs when a central heating system heats up. It consists of a sealed, pressure‑rated vessel that is divided internally by a flexible diaphragm: one side is charged with gas (typically air or nitrogen), and the other side is connected to the boiler’s internal heating circuit. As water temperature rises during normal operation, the heated water expands; the diaphragm compresses the gas charge, absorbing this expansion and preventing excessive pressure build‑up that could otherwise trigger safety shut‑offs, stress seals and joints, or cause leaks.
Manufactured to meet the specifications required by compatible Ideal boilers, the vessel and its components (such as mounting hardware or connection fittings included in the kit) are built to withstand repeated thermal cycling and long‑term operation. Over time, the internal gas charge can diminish, or the diaphragm can weaken or rupture, reducing the vessel’s ability to absorb pressure fluctuations. When this occurs, symptoms may include frequent loss of system pressure, regular need to re‑pressurise the boiler, noise from pipework, or nuisance safety valve discharge. Fitting the genuine Ideal 176865 Expansion Vessel Kit restores proper pressure buffering, helps maintain balanced and efficient system performance, and reduces strain on the boiler and heating circuit components.
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 | 176865 |
|---|---|
| Product Code | EDDIDEALGAS71 |
| Part Origin | Genuine |
| 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 176865 Expansion Vessel Kit
The Ideal 176865 Expansion Vessel Kit is a replacement part designed to manage the natural increase in water volume and pressure that occurs when a central heating system heats up. It consists of a sealed, pressure‑rated vessel that is divided internally by a flexible diaphragm: one side is charged with gas (typically air or nitrogen), and the other side is connected to the boiler’s internal heating circuit. As water temperature rises during normal operation, the heated water expands; the diaphragm compresses the gas charge, absorbing this expansion and preventing excessive pressure build‑up that could otherwise trigger safety shut‑offs, stress seals and joints, or cause leaks.
Manufactured to meet the specifications required by compatible Ideal boilers, the vessel and its components (such as mounting hardware or connection fittings included in the kit) are built to withstand repeated thermal cycling and long‑term operation. Over time, the internal gas charge can diminish, or the diaphragm can weaken or rupture, reducing the vessel’s ability to absorb pressure fluctuations. When this occurs, symptoms may include frequent loss of system pressure, regular need to re‑pressurise the boiler, noise from pipework, or nuisance safety valve discharge. Fitting the genuine Ideal 176865 Expansion Vessel Kit restores proper pressure buffering, helps maintain balanced and efficient system performance, and reduces strain on the boiler and heating circuit components.
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 | 176865 |
|---|---|
| Product Code | EDDIDEALGAS71 |
| Part Origin | Genuine |
| 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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