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Product Details

Technical Specification
Colour by dominance Chrome
Manufacture ID RVE40C
Length (mm) 40
Type Extension Valve
Size (mm) 40
Delivery details
Order value: Under £10 £10 & over
Express usually Next Business Day before 6pm £5 Free
Turbo usually Next Business Day before 12 noon £10 £5
Remote areas standard delivery (2-4 days) £5 Free
Order Value: Under £25 Over £25 but less than £75 £75 & Over
£10 £5 Free

Please note items delivered by our suppliers are not available for the options above. Delivery times may vary.

More about Delivery & Returns
Click & Collect details
If you are using our Click & Collect service please note the following:
  • Order online or over the phone and collect in branch from 5 minutes later.
  • Ensure you check stock is available for collection at your chosen branch.
  • Check branch opening hours to ensure you have sufficient time to collect.
  • For items not available for same day collection, place order before 9pm Mon-Fri (4pm Sun) and you can collect Next Business Day (Mon-Fri) after 3pm.
  • If we have your mobile number, we’ll send you a text when your order is ready to collect.
Radiator Valve Extension 40mm is rated 3.7 out of 5 by 51.
Rated 4 out of 5 by from Why don't they have flats? Sturdy and does the job, except no flats for a spanner so can come undone when doing up the other parts which can cause a lot of trouble.
Date published: 2019-11-30
Rated 5 out of 5 by from Good quality solution Good quality and a variety of sizes will suit most jobs
Date published: 2019-11-30
Rated 3 out of 5 by from Tricky to fit. These extenders are parallel threads and on the looser side of ½”. Use Fernox LS-X with these, as PTFE and other compounds don’t seal the threads!!! Found out the hard way.
Date published: 2019-11-25
Rated 1 out of 5 by from Under engineered Bought six 25mm extensions to replace old radiators with new metric sized radiators, the first two I used both split when tightening. Did I over tighten maybe, but I purchased a different extension from a plumbers merchant and no problem at all and was very weary of over tightening. These extensions from Toolstation are a cheap manufactured product of poor quality.
Date published: 2019-11-20
Rated 1 out of 5 by from Rubbish Brought 4 to fit to 2 radiators and all but one developed a split after a couple of days so Tool station exchanged them for new ones which also developed a split a couple of days after fitting, Be aware they look good when fitted but its after a couple days of use they split
Date published: 2019-11-20
Rated 1 out of 5 by from Valve extensions.....very poor Used two 50 MM long rad valve extensions to fit a smaller radiator as I couldn’t get under the floor to alter the flow and return pipe work . Both of the extensions split on female 1/2” BSP end . Very thin wall thickness , very disappointed cost me time and cash .
Date published: 2019-11-11
Rated 5 out of 5 by from Make your new radiator fit. Very good product with these you can make any radiator fit.
Date published: 2019-11-09
Rated 5 out of 5 by from Rad extension Fantastic quality use them on 2 radiators
Date published: 2019-11-08
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