VAILLANT ECOTEC PRO 24 & PRO 28 VUW PRESSURE RELIEF SAFETY VALVE ( PRV )178985
IN STOCK
FROM £11.87
Vaillant Boiler Pressure Relief Valve (PRV) 178985
Product Overview
This replacement pressure relief valve (PRV), reference 178985, is intended for compatible Vaillant boilers. It forms part of the heating circuit's safety system, releasing water through the discharge pipe when system pressure becomes too high. Supplied as the valve only.
ℹ️ Product Condition Options:
This part may be available in New, Refurbished, or Compatible conditions. Please select your desired option from the dropdown menu above. All refurbished parts are professionally tested to ensure reliability.
This part may be available in New, Refurbished, or Compatible conditions. Please select your desired option from the dropdown menu above. All refurbished parts are professionally tested to ensure reliability.
Technical Insight & Common Failure Symptoms
The PRV opens to relieve excess pressure and closes again when the pressure falls. Debris or limescale around the valve seal can cause persistent leakage. Discharge can also indicate excessive system pressure, so the cause should be diagnosed before replacing the valve.
Symptoms that may indicate a PRV fault include:
- Persistent dripping from the pressure relief discharge pipe.
- Loss of heating-system pressure caused by leakage through the valve.
- A valve that fails to close properly after releasing excess pressure.
Compatibility
Replacement part reference: 178985. See the Compatible Products section for the appliance list and GC numbers. Check the part reference against your boiler's parts diagram before ordering.
Safety Advice: Boiler parts involve gas, water, and electricity. Installation must be carried out by a Gas Safe registered engineer.
This part fits the following boilers:
Fits Appliance(s)
GC No.
Vaillant Ecofit Pure 612 System VU 126/6-3 (H-GB)
Vaillant Ecofit Pure 615 System VU 156/6-3 (H-GB)
Vaillant Ecofit Pure 618 System VU 186/6-3 (H-GB)
Vaillant Ecofit Pure 625 System VU 256/6-3 (H-GB)
Vaillant Ecofit Pure 630 System VU 306/6-3 (H-GB)
Vaillant Ecofit Pure 825 Combi VUW 256/6-3 (H-GB)
Vaillant Ecofit Pure 830 Combi VUW 306/6-3 (H-GB)
Vaillant Ecofit Pure 835 Combi VUW 356/6-3 (H-GB)
Vaillant Sustain 825 VUW 256/6-3 (H-GB)
Vaillant Sustain 830 VUW 306/6-3 (H-GB)
Vaillant Sustain 835 VUW 356/6-3 (H-GB)
Vaillant Ecotec Exclusive 835 VUW 356/5-7
Vaillant Ecotec Exclusive 843 VUW 436/5-7
Vaillant Ecotec Plus 612 VU 126/3-5 2005-2005
Vaillant Ecotec Plus 612 VU 126/3-5 R1 2005-2012
Vaillant Ecotec Plus 612 VU 126/5-5 2012-2012
Vaillant Ecotec Plus 612 VU 126/5-5 A R4 2015 Onwards
Vaillant Ecotec Plus 612 VU 126/5-5 R 6 2017 Onwards
Vaillant Ecotec Plus 612 VU 126/5-5 R1 2012-2013
Vaillant Ecotec Plus 612 VU 126/5-5 R2 2013-2015
Vaillant Ecotec Plus 612 VU 126/5-5 R4 2015-2015
Vaillant Ecotec Plus 612, 615, 618, 624, 630, 637
Vaillant Ecotec Plus 615 VU 156/3-5 2005-2005
Vaillant Ecotec Plus 615 VU 156/3-5 R1 2005-2012
Vaillant Ecotec Plus 615 VU 156/5-5 2012-2012
Vaillant Ecotec Plus 615 VU 156/5-5 A R4 2015 Onwards
Vaillant Ecotec Plus 615 VU 156/5-5 R 6 2017 Onwards
Vaillant Ecotec Plus 615 VU 156/5-5 R1 2012-2013
Vaillant Ecotec Plus 615 VU 156/5-5 R2 2013-2015
Vaillant Ecotec Plus 615 VU 156/5-5 R4 2015-2015
Vaillant Ecotec Plus 618 VU 186/3-5 2005-2005
Vaillant Ecotec Plus 618 VU 186/3-5 R1 2005-2012
Vaillant Ecotec Plus 618 VU 186/5-5 2012-2012 LPG
Vaillant Ecotec Plus 618 VU 186/5-5 2012-2012 NG
Vaillant Ecotec Plus 618 VU 186/5-5 A R4 2015 Onwards LPG
Vaillant Ecotec Plus 618 VU 186/5-5 A R4 2015 Onwards NG
Vaillant Ecotec Plus 618 VU 186/5-5 R 6 2017 Onwards LPG
Vaillant Ecotec Plus 618 VU 186/5-5 R 6 2017 Onwards NG
Vaillant Ecotec Plus 618 VU 186/5-5 R1 2012-2013 LPG
Vaillant Ecotec Plus 618 VU 186/5-5 R1 2012-2013 NG
Vaillant Ecotec Plus 618 VU 186/5-5 R2 2013-2015 LPG
Vaillant Ecotec Plus 618 VU 186/5-5 R2 2013-2015 NG
Vaillant Ecotec Plus 618 VU 186/5-5 R4 2015-2015 LPG
Vaillant Ecotec Plus 618 VU 186/5-5 R4 2015-2015 NG
Vaillant Ecotec Plus 624 VU 246/3-5 2005-2005
Vaillant Ecotec Plus 624 VU 246/3-5 R1 2005-2012
Vaillant Ecotec Plus 624 VU 246/5-5 2012-2012
Vaillant Ecotec Plus 624 VU 246/5-5 A R4 2015 Onwards
Vaillant Ecotec Plus 624 VU 246/5-5 R 6 2017 Onwards
Vaillant Ecotec Plus 624 VU 246/5-5 R1 2012-2013
Vaillant Ecotec Plus 624 VU 246/5-5 R2 2013-2015
Vaillant Ecotec Plus 624 VU 246/5-5 R4 2015-2015
Vaillant Ecotec Plus 630 VU 306/3-5 2005-2005
Vaillant Ecotec Plus 630 VU 306/3-5 R1 2005-2012
Vaillant Ecotec Plus 630 VU 306/5-5 2012-2012 LPG
Vaillant Ecotec Plus 630 VU 306/5-5 2012-2012 NG
Vaillant Ecotec Plus 630 VU 306/5-5 A R4 2015 Onwards LPG
Vaillant Ecotec Plus 630 VU 306/5-5 A R4 2015 Onwards NG
Vaillant Ecotec Plus 630 VU 306/5-5 R 6 2017 Onwards LPG
Vaillant Ecotec Plus 630 VU 306/5-5 R 6 2017 Onwards NG
Vaillant Ecotec Plus 630 VU 306/5-5 R1 2012-2013 LPG
Vaillant Ecotec Plus 630 VU 306/5-5 R1 2012-2013 NG
Vaillant Ecotec Plus 630 VU 306/5-5 R2 2013-2014 LPG
Vaillant Ecotec Plus 630 VU 306/5-5 R2 2013-2014 NG
Vaillant Ecotec Plus 630 VU 306/5-5 R4 2015-2015 LPG
Vaillant Ecotec Plus 630 VU 306/5-5 R4 2015-2015 NG
Vaillant Ecotec Plus 637 VU 376/3-5 R1 2006-2012
Vaillant Ecotec Plus 637 VU 376/5-5 2012-2012
Vaillant Ecotec Plus 637 VU 376/5-5 A R4 2015 Onwards
Vaillant Ecotec Plus 637 VU 376/5-5 R1 2012-2013
Vaillant Ecotec Plus 637 VU 376/5-5 R2 2013-2014
Vaillant Ecotec Plus 637 VU 376/5-5 R4 2015-2015
Vaillant Ecotec Plus 637 VU 386/5-5 R 6 2017 Onwards
Vaillant Ecotec Plus 824 VUW 246/3-5 2005-2012
Vaillant Ecotec Plus 824 VUW 246/3-5 R1 2005-2011
Vaillant Ecotec Plus 824 VUW 246/3-5 R3 2011-2012
Vaillant Ecotec Plus 824 VUW 246/5-5 2012-2012
Vaillant Ecotec Plus 824 VUW 246/5-5 R1 2012-2013
Vaillant Ecotec Plus 824 VUW 246/5-5 R2 2013-2015
Vaillant Ecotec Plus 824 VUW 246/5-5 R4 2015-2015
Vaillant Ecotec Plus 825 VUW 196/5-5 R6 2017 Onwards
Vaillant Ecotec Plus 825 VUW 256/5-5 R4 2015 Onwards
Vaillant Ecotec Plus 831 VUW 316/3-5 2005-2013
Vaillant Ecotec Plus 831 VUW 316/3-5 R1 2005-2011
Vaillant Ecotec Plus 831 VUW 316/3-5 R3 2011-2012
Vaillant Ecotec Plus 831 VUW 316/3-5 R5 2013-2013
Vaillant Ecotec Plus 831 VUW 316/5-5 2012-2012 LPG
Vaillant Ecotec Plus 831 VUW 316/5-5 2012-2012 NG
Vaillant Ecotec Plus 831 VUW 316/5-5 R1 2012-2013 LPG
Vaillant Ecotec Plus 831 VUW 316/5-5 R1 2012-2013 NG
Vaillant Ecotec Plus 831 VUW 316/5-5 R2 2013-2015 LPG
Vaillant Ecotec Plus 831 VUW 316/5-5 R2 2013-2015 NG
Vaillant Ecotec Plus 831 VUW 316/5-5 R4 2015-2015 LPG
Vaillant Ecotec Plus 831 VUW 316/5-5 R4 2015-2015 NG
Vaillant Ecotec Plus 832 VUW 246/5-5 R6 2017 Onwards LPG
Vaillant Ecotec Plus 832 VUW 246/5-5 R6 2017 Onwards NG
Vaillant Ecotec Plus 832 VUW 326/5-5 R4 2015 Onwards
Vaillant Ecotec Plus 835 VUW 306/5-5 R6 2017 Onwards
Vaillant Ecotec Plus 835 VUW 356/5-5 R4 2015 Onwards
Vaillant Ecotec Plus 837 VUW 376/3-5 R1 2006-2011
Vaillant Ecotec Plus 837 VUW 376/3-5 R3 2011-2012
Vaillant Ecotec Plus 837 VUW 376/5-5 2012-2012
Vaillant Ecotec Plus 837 VUW 376/5-5 R1 2012-2013
Vaillant Ecotec Plus 837 VUW 376/5-5 R2 2013-2014
Vaillant Ecotec Plus 837 VUW 376/5-5 R4 2014-2015
Vaillant Ecotec Plus 838 VUW 286/5-5 R6 2017 Onwards
Vaillant Ecotec Plus 838 VUW 386/5-5 R4 2015 Onwards
Vaillant Ecotec Plus 937 VUI 376/3-5 2006-2012
Vaillant Ecotec Plus 937 VUI 376/5-5 2012-2012
Vaillant Ecotec Plus 937 VUI 376/5-5 R1 2012-2013
Vaillant Ecotec Plus 937 VUI 376/5-5 R2 2013-2014
Vaillant Ecotec Plus 937 VUI 376/5-5 R4 2014-2015
Vaillant Ecotec Plus 938 VUI 286/5-5 R6 2017 Onwards
Vaillant Ecotec Plus 938 VUI 386/5-5 R4 2015 Onwards
Vaillant Ecotec Pro 22 VU 226/5-3 A R4 (For Guernsey/Jersey Only) Current Production
Vaillant Ecotec Pro 22 VU 226/5-3 R4 (For Guernsey/Jersey Only)
Vaillant Ecotec Pro 24 VUW 246/3-3 R1 2006-2008
Vaillant Ecotec Pro 24 VUW 246/3-3 R2 2008-2012
Vaillant Ecotec Pro 24 VUW 246/5-3 2012-2012
Vaillant Ecotec Pro 24 VUW 246/5-3 R1 2012-2013
Vaillant Ecotec Pro 24 VUW 246/5-3 R2 2013-2015
Vaillant Ecotec Pro 24 VUW 246/5-3 R4 (2015-2017)
Vaillant Ecotec Pro 24 VUW 246/5-3 R4 2015-2015
Vaillant Ecotec Pro 28 VUW 286/3-3 R1 2005-2008
Vaillant Ecotec Pro 28 VUW 286/3-3 R2 2008-2012
Vaillant Ecotec Pro 28 VUW 286/5-3 2012-2012 LPG
Vaillant Ecotec Pro 28 VUW 286/5-3 2012-2012 NG
Vaillant Ecotec Pro 28 VUW 286/5-3 R1 2012-2013 LPG
Vaillant Ecotec Pro 28 VUW 286/5-3 R1 2012-2013 NG
Vaillant Ecotec Pro 28 VUW 286/5-3 R2 2013-2015 LPG
Vaillant Ecotec Pro 28 VUW 286/5-3 R2 2013-2015 NG
Vaillant Ecotec Pro 28 VUW 286/5-3 R4 2015 - 2017
Vaillant Ecotec Pro 28 VUW 286/5-3 R4 2015 - 2017 LPG
Vaillant Ecotec Pro 28 VUW 286/5-3 R4 2015-2015 LPG
Vaillant Ecotec Pro 28 VUW 286/5-3 R4 2015-2015 NG
Vaillant Ecotec Pro 30 VUW 306/5-3 R4 (2015 Onwards)
Vaillant Exclusive 627 VU 256/5-7
Vaillant Sustain 24 VUW 246/7-2
Vaillant Sustain 28 VUW 286/7-2
Vaillant Sustain 34 VUW 346/7-2
Vaillant VWZ MEH 61 2013 Onwards
Vaillant VWZ MWT 150 2013 Onwards
Vaillant Home Combi 25 -A
Vaillant Home Combi 30 -A
Vaillant Home Combi 35 -A
Vaillant Home System 12 -A
Vaillant Home System 15 -A
Vaillant Home System 18 -A
Vaillant Home System 25 -A
41-694-03 (0010020395)
41-694-04 (0010020396)
41-694-05 (0010020397)
41-694-06 (0010020398)
41-694-07 (0010020399)
47-044-68
47-044-74
47-044-70
47-044-71
47-044-72
47-044-73
47-044-66
47-044-67
41-044-44
41-044-44 R1
41-044-60
41-044-78
41-694-20 R6 (0010021828)
41-044-60 R1
41-044-60 R2
41-044-60 R4
ECOTEC PLUS 612, 615, 618, 624, 630, 637
41-044-45
41-044-45 R1
41-044-61
41-044-79
41-694-21 R6 (0010021829)
41-044-61 R1
41-044-61 R2
41-044-61 R4
41-044-46
41-044-46 R1
41-044-66
41-044-62
41-044-81
41-044-80
41-694-23 R6 (0010021831)
41-694-22 R6 (0010021830)
41-044-66 R1
41-044-62 R1
41-044-66 R2
41-044-62 R2
41-044-66 R4
41-044-62 R4
41-044-47
41-044-47 R1
41-044-63
41-044-82
41-694-24 R6 (0010021832)
41-044-63 R1
41-044-63 R2
41-044-63 R4
41-044-48
41-044-48 R1
41-044-67
41-044-64
41-044-84
41-044-83
41-694-26 R6 (0010021834)
41-694-25 R6 (0010021833)
41-044-67 R1
41-044-64 R1
41-044-67 R2
41-044-64 R2
41-044-67 R4
41-044-64 R4
41-044-52
41-044-65
41-044-85
41-044-65 R1
41-044-65 R2
41-044-65 R4
41-694-27 R6 (0010021835)
47-044-31
47-044-31 R1
47-044-31 R2
47-044-40
47-044-40 R1
47-044-40 R2
47-044-40 R4
47-044-83 R6 (0010021823)
47-044-57
47-044-32
47-044-32 R1
47-044-32 R3
47-044-32 R5
47-044-46
47-044-41
47-044-46 R1
47-044-41 R1
47-044-46 R2
47-044-41 R2
47-044-46 R4
47-044-41 R4
47-044-85 R6 (0010021825)
47-044-84 R6 (0010021824)
47-044-58
47-044-82 R6 (0010021822)
47-044-53
47-044-33 R1
47-044-33 R3
47-044-42
47-044-42 R1
47-044-42 R2
47-044-42 R4
47-044-86 R6 (0010021826)
47-044-60
47-044-39
47-044-43
47-044-43 R1
47-044-43 R2
47-044-43 R4
47-044-87 R6 (0010021827)
47-044-61 R4
10018497
10015190
47-044-36 R1
47-044-36 R2
47-044-44
47-044-44 R1
47-044-44 R2
47-044-54
47-044-44 R4
47-044-30 R1
47-044-30 R2
47-044-47
47-044-45
47-044-47 R1
47-044-45 R1
47-044-47 R2
47-044-45 R2
47-044-55 (0010018495)
47-044-56 (0010018496)
47-044-47 R4
47-044-45 R4
47-044-52
41-694-02
47-044-79
47-044-80
47-044-81
20143590
20143800
47-044-62
47-044-63
47-044-64
41-044-94
41-044-95
41-044-96
41-044-97
Delivery
Free next day UK delivery is available on orders over £50.
Orders placed before 3 PM are usually dispatched the same working day.
Delivery times may vary for remote areas, Highlands, islands, and non-mainland UK destinations.
If you need urgent delivery help, please contact our customer service team before placing your order.
All Orders First 30 Days:
You can return or cancel your orders for any reason at any time within 30 days of receipt. After 30 days, we reserve the right to charge a restocking fee or refuse the return.
Parts must be returned in the same condition and packaging as received, or we may deduct a percentage of the cost of the part.
A full refund or exchange will be agreed once the item(s) have been received and inspected to ensure they are unused and in their original packaging where applicable.
If the part is returned as faulty and is found to be working upon inspection, postage costs will be deducted from the refund.
Faulty Items After 30 Days:
All items come with a 1 year HTS warranty from the date of purchase. Warranty means HTS will repair or replace the item.
Refunds:
Our returns team will process your refund after we receive and check your items. Please allow up to 15 days for your refund to be processed.
The refund will be made to the original payment method used to place the order.
Contact Us:
For any queries, email us at returns@heatingtradesupplies.com or call +44 01912633708.
Customer Services
National Boiler Spares Ltd
Tyne View Terrace
Wallsend
Tyne and Wear
NE28 6SG
