Vaillant 178985 3 Bar Pressure Relief Valve | Replacement Spare Part
- SKU
- EDDVAILLANTSPARES03
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The Vaillant 178985 3 Bar Pressure Relief Valve is a key safety component in sealed central heating systems, designed to activate at around 3 bar to prevent dangerous pressure build-up. Over time, system stress, corrosion or debris can cause valves to wear out, leading to slow leakage or failure to release pressure when needed. Replacing this valve as part of scheduled maintenance helps preserve system integrity and prevents costly breakdowns or water damage. The design supports compatibility with a wide range of Vaillant models, making it a commonly replaced part during boiler servicing. It features reliable mechanical operation that ensures it functions even if electronic components fail elsewhere in the system. Because it is part of the primary safety line of defence, installation should always be handled by a qualified heating engineer who can confirm the system is correctly sealed and balanced after fitting.
Vaillant provide a 1 year warranty on all spare parts. 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.
This is a compatible Vaillant product, designed to match the original specifications and provide reliable performance.
| MPN | 178985 |
|---|---|
| Product Code | EDDVAILLANTSPARES03 |
| Compatible With: Product Code (SKU) | ecoTEC Plus 612-637/824-937; ecoTEC Pro 24/28/30 |
| Part Origin | Compatible |
| Part or Accessory? | Part |
| Brand | Vaillant |
| Empty Weight | 2 |
| Full Weight (kG) | .5 |
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.
Vaillant 178985 3 Bar Pressure Relief Valve
The Vaillant 178985 3 Bar Pressure Relief Valve is a key safety component in sealed central heating systems, designed to activate at around 3 bar to prevent dangerous pressure build-up. Over time, system stress, corrosion or debris can cause valves to wear out, leading to slow leakage or failure to release pressure when needed. Replacing this valve as part of scheduled maintenance helps preserve system integrity and prevents costly breakdowns or water damage. The design supports compatibility with a wide range of Vaillant models, making it a commonly replaced part during boiler servicing. It features reliable mechanical operation that ensures it functions even if electronic components fail elsewhere in the system. Because it is part of the primary safety line of defence, installation should always be handled by a qualified heating engineer who can confirm the system is correctly sealed and balanced after fitting.
Vaillant provide a 1 year warranty on all spare parts. 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.
This is a compatible Vaillant product, designed to match the original specifications and provide reliable performance.
| MPN | 178985 |
|---|---|
| Product Code | EDDVAILLANTSPARES03 |
| Compatible With: Product Code (SKU) | ecoTEC Plus 612-637/824-937; ecoTEC Pro 24/28/30 |
| Part Origin | Compatible |
| Part or Accessory? | Part |
| Brand | Vaillant |
| Empty Weight | 2 |
| Full Weight (kG) | .5 |
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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