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Ro unit

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Home / Fish & Aquarium / Ro unit refurbished & used for sale | For Sale UK
Reverse osmosis unit - reverse, with

Reverse osmosis unit - reverse, with

£139.99 · Buy It Now

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Aquati stage di - 5, resin

Aquati stage di - 5, resin

£88.95 · Buy It Now

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100gpd stage reverse - 4,

100gpd stage reverse - 4,

£89.99 · Buy It Now

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Reverse osmosis unit - osmosis, ro

Reverse osmosis unit - osmosis, ro

£24.99 · Buy It Now

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Reverse osmosis stage - osmosis,

Reverse osmosis stage - osmosis,

£22.99 · Buy It Now

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100gpd stage compact - 50/75/100gpd,

100gpd stage compact - 50/75/100gpd,

£41.99 · Buy It Now

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Reverse osmosis unit - osmosis, ro

Reverse osmosis unit - osmosis, ro

£64.99 · Buy It Now

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Reverse osmosis unit - reverse, filter

Reverse osmosis unit - reverse, filter

£10.99 · Buy It Now

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Aquati stage di system - aquati, 5

Aquati stage di system - aquati, 5

£33.95 · Buy It Now

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Flow restrictor for reverse - restrictor,

Flow restrictor for reverse - restrictor,

£3.99 · Buy It Now

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Reverse osmosis unit filter - reverse,

Reverse osmosis unit filter - reverse,

£6.99 · Buy It Now

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400gpd reverse osmosis fcs - reverse, ro

400gpd reverse osmosis fcs - reverse, ro

£59.99 · Buy It Now

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Stage di reverse - 4, &

Stage di reverse - 4, &

£58.99 · Buy It Now

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Window cleaning aquarium

Window cleaning aquarium

£82.99 · Buy It Now

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200gpd reverse osmosis fcs - reverse,

200gpd reverse osmosis fcs - reverse,

£39.99 · Buy It Now

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Stage di resin reverse - stage, ro

Stage di resin reverse - stage, ro

£95.00 · Buy It Now

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Aquati stage reverse osmosis - reverse,

Aquati stage reverse osmosis - reverse,

£32.95 · Buy It Now

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Reverse osmosis vontron - reverse,

Reverse osmosis vontron - reverse,

£21.95 · Buy It Now

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Reverse osmosis unit - osmosis, ro

Reverse osmosis unit - osmosis, ro

£37.99 · Buy It Now

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Finerfilters aquarium water - aquarium,

Finerfilters aquarium water - aquarium,

£48.50 · Buy It Now

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Reverse osmosis filter - filter, set

Reverse osmosis filter - filter, set

£27.99 · Buy It Now

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Vontron high quality reverse - vontron,

Vontron high quality reverse - vontron,

£21.95 · Buy It Now

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Aquati stage di - aquati,

Aquati stage di - aquati,

£27.95 · Buy It Now

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Granulated gac carbon - 10",

Granulated gac carbon - 10",

£161.99 · Buy It Now

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Aquati stage di unit - 4, ro

Aquati stage di unit - 4, ro

£54.95 · Buy It Now

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Geekpure 50gpd unit - ro,

Geekpure 50gpd unit - ro,

£21.50 · Buy It Now

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Stage di resin - 5,

Stage di resin - 5,

£88.95 · Buy It Now

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Reverse osmosis unit - osmosis,

Reverse osmosis unit - osmosis,

£84.50 · Buy It Now

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100 150gpd stage reverse - 4,

100 150gpd stage reverse - 4,

£90.00 · Buy It Now

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200gpd stage reverse osmosis - 200gpd,

200gpd stage reverse osmosis - 200gpd,

£169.99 · Buy It Now

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Aquarium reverse osmosis - , 5

Aquarium reverse osmosis - , 5

£72.00 · Buy It Now

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Pozzani prowater 4040 - pozzani, /

Pozzani prowater 4040 - pozzani, /

£126.00 · Buy It Now

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Vontron reverse osmosis - 3,

Vontron reverse osmosis - 3,

£83.95 · Buy It Now

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Aquarium reverse osmosis - reverse, 3

Aquarium reverse osmosis - reverse, 3

£69.95 · Buy It Now

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Reverse osmosis ro unit - 10",

Reverse osmosis ro unit - 10",

£74.99 · Buy It Now

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Reverse osmosis unit - ro,

Reverse osmosis unit - ro,

£17.49 · Buy It Now

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Ro carbon sediment - 10",

Ro carbon sediment - 10",

£16.95 · Buy It Now

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Compact unit replacement - ro,

Compact unit replacement - ro,

£8.49 · Buy It Now

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Reverse osmosis filter - di,

Reverse osmosis filter - di,

£42.99 · Buy It Now

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Aquati stage di - 5, ro

Aquati stage di - 5, ro

£146.95 · Buy It Now

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Aquati stage di unit - aquati,

Aquati stage di unit - aquati,

£48.15 · Buy It Now

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Reverse osmosis ro unit - x,

Reverse osmosis ro unit - x,

£10.99 · Buy It Now

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Chen self regulating booster - self,

Chen self regulating booster - self,

£59.99 · Buy It Now

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High pressure switch - pressure, 1/4''

High pressure switch - pressure, 1/4''

£4.99 · Buy It Now

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Replacement flush valve - flush,

Replacement flush valve - flush,

£7.99 · Buy It Now

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Compact stage reverse - l4,

Compact stage reverse - l4,

£42.50 · Buy It Now

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Aquati stage di unit - aquati,

Aquati stage di unit - aquati,

£49.85 · Buy It Now

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Complete filter replacement - filter,

Complete filter replacement - filter,

£25.90 · Buy It Now

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Reverse osmosis vontron - reverse,

Reverse osmosis vontron - reverse,

£16.95 · Buy It Now

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Compact reverse osmosis - reverse,

Compact reverse osmosis - reverse,

£8.99 · Buy It Now

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Stage reverse osmosis - 3,

Stage reverse osmosis - 3,

£40.95 · Buy It Now

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Flow restrictor 4 - flow,

Flow restrictor 4 - flow,

£4.95 · Buy It Now

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Man unit - ro,

Man unit - ro,

£16.15 · Buy It Now

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Aquati replacement cartridges - aquati,

Aquati replacement cartridges - aquati,

£12.99 · Buy It Now

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Aquati stage medium reverse - aquati,

Aquati stage medium reverse - aquati,

£70.84 · Buy It Now

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Large stage reverse osmosis - large,

Large stage reverse osmosis - large,

£72.95 · Buy It Now

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Aquati large complete - large, 75gpd

Aquati large complete - large, 75gpd

£76.95 · Buy It Now

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Stage aquarium reverse - 4,

Stage aquarium reverse - 4,

£58.99 · Buy It Now

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Standard water storage tank - standard,

Standard water storage tank - standard,

£42.79 · Buy It Now

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Stage reverse osmosis ro - reverse,

Stage reverse osmosis ro - reverse,

£37.90 · Buy It Now

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Reverse osmosis vontron - 2,

Reverse osmosis vontron - 2,

£37.95 · Buy It Now

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Low pressure switch for - pressure,

Low pressure switch for - pressure,

£4.99 · Buy It Now

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Post inline water filter - ro,

Post inline water filter - ro,

£26.90 · Buy It Now

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Carbon block filter - 10",

Carbon block filter - 10",

£161.99 · Buy It Now

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Reverse osmosis additional - reverse,

Reverse osmosis additional - reverse,

£44.95 · Buy It Now

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Reverse osmosis water - di,

Reverse osmosis water - di,

£85.95 · Buy It Now

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Stage reverse osmosis - stage,

Stage reverse osmosis - stage,

£34.90 · Buy It Now

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Aquati reverse osmosis pre - aquati,

Aquati reverse osmosis pre - aquati,

£39.95 · Buy It Now

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Aquati year supply - 1,

Aquati year supply - 1,

£24.95 · Buy It Now

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Stage rodi aquarium - 4,

Stage rodi aquarium - 4,

£99.99 · Buy It Now

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Stage compact aquarium - stage,

Stage compact aquarium - stage,

£36.99 · Buy It Now

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100gpd membrane reverse - 100gpd,

100gpd membrane reverse - 100gpd,

£15.49 · Buy It Now

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Unit - ro,

Unit - ro,

£23.58 · Buy It Now

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High quality vontron reverse - high,

High quality vontron reverse - high,

£45.95 · Buy It Now

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Aquati stage large di - aquati,

Aquati stage large di - aquati,

£78.95 · Buy It Now

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Reverse osmosis membrane - reverse,

Reverse osmosis membrane - reverse,

£17.95 · Buy It Now

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Flow restrictor 300 350 - 350, 420

Flow restrictor 300 350 - 350, 420

£4.95 · Buy It Now

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Unit 5 micron - ro,

Unit 5 micron - ro,

£10.94 · Buy It Now

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Reverse osmosis membranes - reverse, ro

Reverse osmosis membranes - reverse, ro

£43.95 · Buy It Now

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Finerfilters aquarium stage - finerfilters,

Finerfilters aquarium stage - finerfilters,

£70.00 · Buy It Now

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L13 stage reverse osmosis - 3,

L13 stage reverse osmosis - 3,

£23.50 · Buy It Now

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100gpd vontron reverse - 100gpd,

100gpd vontron reverse - 100gpd,

£51.95 · Buy It Now

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Water filter spanner tool for - water,

Water filter spanner tool for - water,

£4.99 · Buy It Now

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Set reverse osmosis - set,

Set reverse osmosis - set,

£30.95 · Buy It Now

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Stage rodi aquarium reverse - aquarium,

Stage rodi aquarium reverse - aquarium,

£119.95 · Buy It Now

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Aquati stage 200gpd - aquati,

Aquati stage 200gpd - aquati,

£59.95 · Buy It Now

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Stage reverse osmosis ro - stage,

Stage reverse osmosis ro - stage,

£24.90 · Buy It Now

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Reverse osmosis water - 5,

Reverse osmosis water - 5,

£92.95 · Buy It Now

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L13 reverse osmosis 3 - l13,

L13 reverse osmosis 3 - l13,

£26.99 · Buy It Now

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Set reverse osmosis - set,

Set reverse osmosis - set,

£18.95 · Buy It Now

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Reverse osmosis system - 10",

Reverse osmosis system - 10",

£12.95 · Buy It Now

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Reverse osmosis vontron - reverse,

Reverse osmosis vontron - reverse,

£17.95 · Buy It Now

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Stage reverse osmosis - ro,

Stage reverse osmosis - ro,

£39.95 · Buy It Now

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Stage di reverse - stage,

Stage di reverse - stage,

£51.95 · Buy It Now

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Stage reverse osmosis pre - reverse,

Stage reverse osmosis pre - reverse,

£23.99 · Buy It Now

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Stage with di - 5,

Stage with di - 5,

£85.95 · Buy It Now

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📊96 listings · from £3.99 · avg £49.26
⚠️ These listings were last updated more than 17 days ago. Search for fresh listings

Browse 96 ro unit listings currently in our index. Prices range from £3.99 to £169.99, with an average of £49.26. Whether you are hunting for a bargain or looking for a top-spec model, the selection below covers all price points — new, used and refurbished. More about ro unit →

Try this: tropical fish guppies | koi fry | 10ft aquarium | eheim external | red sea skimmer | superfish pump | biorb pump | large live aquarium plants | tall aquarium | juwel vision 450

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Everything you need to know about ro unit

Whether you are looking for a brand-new or second-hand ro unit, eBay offers one of the largest selections available online. With 96 active listings at the time of this page's last update, you have plenty of choice across different conditions, sellers and price points. The cheapest option currently starts at £3.99, while premium listings can reach £169.99 — giving you a wide budget spread to work with. The average price of £49.26 can serve as a useful benchmark: listings below this tend to be used or auction-style, while those above often include extra accessories, warranties, or are sold by professional sellers with high feedback scores. Always check the seller's feedback rating and return policy before committing to a purchase. If you need the item quickly, filter by "Buy It Now" to avoid the uncertainty of auctions. For used items, look closely at the condition description and photos — terms like "good", "very good" and "like new" can mean very different things depending on the seller.

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