Reflex Expansion Vessel 18Ltr Product Code: 26891

Suitable for heating and cooling systems. Not suitable for potable water.


Max. pressure 6bar. Max. temperature 120°C.
Additional Information
Technical Specification
  • Brand : Reflex
  • Product Type : Expansion Vessel
  • Litre Capacity : 18 Ltr
  • Bar Pressure : 3 bar
  • Pack Size : 1
  • Manufacturer Guarantee : 1 Year Guarantee
  • Pieces in Pack/Case : 1
  • Maximum Bar Pressure : 6 bar
Product Contents
Delivery & Returns


Standard delivery: €15

Free delivery on all orders over €70.00

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Hopefully you won't need to return an item, however, if you do, it is our aim to make this as simple as possible. By following the guidance below you can help us to help you when a product is not what you expected, or is faulty. Your statutory rights are not affected by this guidance.


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€38.45 Incl. 20% VAT

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Reflex Expansion Vessel 18Ltr is rated 3.5 out of 5 by 21.
Rated 1 out of 5 by from Buyer beware! These rust from inside causing pinhole leaks and splits. I’ve fitted two now and both have failed in the same way after 6-12 months. They appear good quality but clearly have a very limited life and in my opinion should be withdrawn from sale.
Date published: 2019-04-30
Rated 4 out of 5 by from great expansion vessel Bought in a hurry to replace a 4 year old Reflex which split over Easter weekend. So can't report on the reliability of this one just yet. Looks well made, easy to install. A pity it doesn't come with a bracket but otherwise no complaints. Pre-charged at 1.5bar which was handy
Date published: 2019-04-24
Rated 5 out of 5 by from Great product great price Great price and product would highly recommend screwfix
Date published: 2019-04-19
Rated 1 out of 5 by from DON'T USE THIS PRODUCT About 2 years ago I had an issue with my hot water system and to be fair the cylinder needs to be replaced as its on its last legs, but the primary issue was a leak at the expansion neck (rusted out) so I replaced it with one of these, it lasted about 6 months and developed a pin-hole leak on the main body, I used a very crude solder tack to temporarily fix and then replaced it assuming it was bad luck, thats another 6 months and the replacement has done the very same thing this time a shooting jet of water alerted us to the leak, and on looking the vessel has at least 2 holes in it, I also noted (and blamed the cylinder) that I was getting rusty water when first drawing water, I now know this was the expansion tank falling apart on the inside, very very unhappy with the product, but never kept the receipt as didn't expect it to fail, opting for the TRADE recommended version in Blue hopefully it will not be the same issues
Date published: 2019-04-10
Rated 1 out of 5 by from Failed Again! Suggest that anyone using this expansion vessel replace it every 12-18 months. Pinholes, splits occur after this period resulting in leaks. Installation in loft and ceiling has been replaced twice due to leaks. Should follow my own advice!
Date published: 2018-09-29
Rated 4 out of 5 by from New Install It appears to be good quality and comes with instructions. Was installed from new so I cannot rate this one for Reliability (but some rating is mandatory - unfortunately! Hence the 3 stars) as only time will tell.
Date published: 2017-09-08
Rated 5 out of 5 by from Quality product Bought this as a short-term fix for a heating system, but I'm confident it could last for years.
Date published: 2017-06-28
Rated 4 out of 5 by from vessel only one problem I found but gave me some extra work. The thread on the vessel has been powder coated and could not fit valve until I cleared coating.The thread should have been taped during powder coating process.
Date published: 2016-10-10
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