Vaillant 178985 Pressure Relief Valve (PRV) – New Compatible Replacement
SKU: PRE-2663-A-N
The Vaillant 178985 Pressure Relief Valve is suitable for a wide range of Vaillant Ecofit Pure, Ecotec Plus, Ecotec Pro and Sustain boilers.
A faulty pressure relief valve may cause system pressure loss, continuous discharge through the overflow pipe or repeated boiler lockouts. Replacing a worn or leaking PRV helps restore correct pressure control and prevents unnecessary water loss.
This new compatible replacement is precision-engineered to provide dependable operation and the correct pressure release performance.
Installation should always be carried out by a Gas Safe registered engineer.
Compatible Boilers
Vaillant Ecofit Pure Series
| Title | GC Number |
|---|---|
| Ecofit Pure 612 System VU 126/6-3 | 41-694-03 |
| Ecofit Pure 615 System VU 156/6-3 | 41-694-04 |
| Ecofit Pure 618 System VU 186/6-3 | 41-694-05 |
| Ecofit Pure 625 System VU 256/6-3 | 41-694-06 |
| Ecofit Pure 630 System VU 306/6-3 | 41-694-07 |
| Ecofit Pure 825 Combi VUW 256/6-3 | 47-044-68 |
| Ecofit Pure 830 Combi VUW 306/6-3 | 47-044-74 |
| Ecofit Pure 835 Combi VUW 356/6-3 | 47-044-70 |
Vaillant Sustain Series
| Title | GC Number |
| Sustain 825 VUW 256/6-3 | 47-044-71 |
| Sustain 830 VUW 306/6-3 | 47-044-72 |
| Sustain 835 VUW 356/6-3 | 47-044-73 |
| Sustain 24 VUW 246/7-2 | 47-044-79 |
| Sustain 34 VUW 346/7-2 | 47-044-81 |
Vaillant Ecotec Plus Series
| Title | GC Number |
| Ecotec Plus 612 VU 126/3-5 | 41-044-44 |
| Ecotec Plus 615 VU 156/3-5 | 41-044-45 |
| Ecotec Plus 618 VU 186/3-5 | 41-044-46 |
| Ecotec Plus 624 VU 246/3-5 | 41-044-47 |
| Ecotec Plus 630 VU 306/3-5 | 41-044-48 |
| Ecotec Plus 637 VU 376/5-5 | 41-044-65 |
| Ecotec Plus 824 VUW 246/5-5 | 47-044-40 |
| Ecotec Plus 831 VUW 316/5-5 | 47-044-41 |
| Ecotec Plus 835 VUW 356/5-5 | 47-044-53 |
| Ecotec Plus 937 VUI 376/5-5 | 47-044-43 |
Vaillant Ecotec Pro Series
| Title | GC Number |
| Ecotec Pro 22 VU 226/5-3 | 0010015190 |
| Ecotec Pro 24 VUW 246/5-3 | 47-044-44 |
| Ecotec Pro 28 VUW 286/5-3 | 47-044-45 |
| Ecotec Pro 30 VUW 306/5-3 | 47-044-52 |
Please note: Before placing your order, check that your existing part matches manufacturer part number 178985.
Vaillant Boiler Spares
For other Vaillant-related products, please follow the relevant Vaillant Spares link.
Prices: Please note that all prices are inclusive of VAT.
Returns and Delivery
At Heating and Catering Parts, we aim to provide the best possible customer experience. However, we understand that a product may occasionally not meet your expectations or requirements.
For this reason, we offer a comprehensive 30-day return policy. Please read our full Return Policy for further details.
Orders received by 3:00 p.m. EST, Monday to Friday, are usually dispatched on the same day. We take pride in providing a fast and dependable service and will make every effort to ensure your package arrives safely.
Please note that weekends are not included in our next-day delivery guarantee. Next-day delivery for orders placed on Fridays will take place on the following Monday.
For weekend delivery, select the Saturday delivery option at checkout.
Thank you for choosing us!
| SKU | PRE-2663-A-N |
Vaillant
Free Delivery
Free UK delivery on orders over £75. Same-day dispatch on orders placed before 4pm on working days.
Returns
We offer a 30-day returns policy. Items must be returned in original condition and packaging. Contact our team to arrange a return.