For Sale USA

Ro di system

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Ro di system for sale on largest auction and classifieds sites

Home / Air Filters / Ro di system refurbished & used for sale | For Sale USA
Blue dragon xtreme - dragon,

Blue dragon xtreme - dragon,

$1046.50
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Liquagen stage deluxe 150 - liquagen,

Liquagen stage deluxe 150 - liquagen,

$249.99
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Liquagen 200 gpd stage - liquagen,

Liquagen 200 gpd stage - liquagen,

$229.99
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Liquagen gpd stage ro - gpd, di

Liquagen gpd stage ro - gpd, di

$159.00
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Aquarium reverse osmosis - aquarium,

Aquarium reverse osmosis - aquarium,

$160.00
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Reverse osmosis - reverse,

Reverse osmosis - reverse,

$90.00
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Reef aquarium reverse - reef, osmosis

Reef aquarium reverse - reef, osmosis

$139.95
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Aquarium reverse osmosis - aquarium,

Aquarium reverse osmosis - aquarium,

$131.95
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Buddie stage aquarium - buddie,

Buddie stage aquarium - buddie,

$68.25
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Reverse osmosis - reverse,

Reverse osmosis - reverse,

$160.00
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Liquagen stage 150 gpd - stage,

Liquagen stage 150 gpd - stage,

$229.99
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Buddie stage aquarium - ro,

Buddie stage aquarium - ro,

$100.49
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Liquagen stage 150 gpd - stage, ro/di

Liquagen stage 150 gpd - stage, ro/di

$189.99
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Aquarium reef coral reverse - aquarium,

Aquarium reef coral reverse - aquarium,

$178.00
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Reverse osmosis - ,

Reverse osmosis - ,

$165.68
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Liquagen stage 100 gpd - 6, ro/di

Liquagen stage 100 gpd - 6, ro/di

$174.49
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Stage 50 75 100 - stage, 50/75/100/150g

Stage 50 75 100 - stage, 50/75/100/150g

$37.61
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Aquatec cdp 6800 booster - 6800,

Aquatec cdp 6800 booster - 6800,

$88.00
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Liquagen stage deluxe 150 - stage,

Liquagen stage deluxe 150 - stage,

$200.00
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Made usa stage - in, aquarium

Made usa stage - in, aquarium

$150.00
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Pack gpd ro membrane - pack,

Pack gpd ro membrane - pack,

$94.90
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Stage water filter 100 - 4,

Stage water filter 100 - 4,

$186.99
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Clear filter housing for - 10",

Clear filter housing for - 10",

$26.50
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Aquarium reef deionization - aquarium,

Aquarium reef deionization - aquarium,

$125.00
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Max water stage 100gpd - water, reef

Max water stage 100gpd - water, reef

$154.95
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Stage aquarium reef - 6,

Stage aquarium reef - 6,

$179.95
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Stage aquarium reef reverse - aquarium,

Stage aquarium reef reverse - aquarium,

$115.00
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Liquagen stage genesis di - liquagen, 4

Liquagen stage genesis di - liquagen, 4

$155.55
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Ispring rcc1d tankless di - ispring,

Ispring rcc1d tankless di - ispring,

$171.59
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Liquagen maestro stage - 7, 150

Liquagen maestro stage - 7, 150

$219.99
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100gpd reverse osmosis - 100gpd,

100gpd reverse osmosis - 100gpd,

$262.39
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Liquagen stage ultra premium - liquagen, 6

Liquagen stage ultra premium - liquagen, 6

$284.00
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Four stage reverseosmosis - four-stage,

Four stage reverseosmosis - four-stage,

$69.19
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Stage 75gpd portable - 75gpd,

Stage 75gpd portable - 75gpd,

$119.00
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Commercial reverse - commercial,

Commercial reverse - commercial,

$599.99
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Geekpure stage portable - geekpure, 4

Geekpure stage portable - geekpure, 4

$59.99
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Stage bulk reef - bulk,

Stage bulk reef - bulk,

$247.00
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Made usa stage - made, usa.6

Made usa stage - made, usa.6

$150.00
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Liquagen stage premium 150 - stage,

Liquagen stage premium 150 - stage,

$274.99
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Liquagen stage 150 gpd di - liquagen,

Liquagen stage 150 gpd di - liquagen,

$259.99
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Stages gpd aquarium - 50,

Stages gpd aquarium - 50,

$180.00
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Stages gpd aquarium - 6,

Stages gpd aquarium - 6,

$180.00
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Liquagen stage di - 4, ro/di

Liquagen stage di - 4, ro/di

$99.99
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Premier stage di aquarium - premier, ro/di

Premier stage di aquarium - premier, ro/di

$152.99
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Aquarium reef reverse osmosis - reef,

Aquarium reef reverse osmosis - reef,

$145.99
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Aquarium reef reverse osmosis - aquarium,

Aquarium reef reverse osmosis - aquarium,

$139.95
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Ispring rcc1dp tankless di - rcc1dp, ro/di

Ispring rcc1dp tankless di - rcc1dp, ro/di

$169.00
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Express water stage - express, 10

Express water stage - express, 10

$153.89
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Aquafx barracuda water - aquafx,

Aquafx barracuda water - aquafx,

$129.99
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Liquagen single stage - stage, di

Liquagen single stage - stage, di

$49.99
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Stage reverse - 3-stage,

Stage reverse - 3-stage,

$35.99
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Premier aquarium reef gpd - premier,

Premier aquarium reef gpd - premier,

$135.00
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Stage 0ppm ro di - 7, ro/di

Stage 0ppm ro di - 7, ro/di

$195.95
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Pack 100 150 gpd membrane - pack,

Pack 100 150 gpd membrane - pack,

$52.94
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Piece clear empty - 1,

Piece clear empty - 1,

$14.99
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Pack push to connect - pack,

Pack push to connect - pack,

$13.11
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Twist stage ro - twist-in, ro/di

Twist stage ro - twist-in, ro/di

$130.51
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Stage reverse osmosis - 3/4/5/6,

Stage reverse osmosis - 3/4/5/6,

$46.94
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Aquatec cdp 6800 - cdp, booster

Aquatec cdp 6800 - cdp, booster

$84.99
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Geekpure stage portable - 4,

Geekpure stage portable - 4,

$57.99
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Reverse osmosis - reverse,

Reverse osmosis - reverse,

$199.00
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Stage aquarium reef reverse - reef,

Stage aquarium reef reverse - reef,

$204.99
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Stage aquarium reef reverse - 5,

Stage aquarium reef reverse - 5,

$135.00
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Stage aquarium reef reverse - reef,

Stage aquarium reef reverse - reef,

$119.99
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100 gpd membrane reverse - membrane,

100 gpd membrane reverse - membrane,

$26.96
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Aquarium reef reverse - reef, osmosis

Aquarium reef reverse - reef, osmosis

$158.99
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Max water feet inch - water, 3/8”

Max water feet inch - water, 3/8”

$27.49
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Aquafx barracuda glacial - aquafx,

Aquafx barracuda glacial - aquafx,

$218.99
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100 gallon reverse osmosis - 100,

100 gallon reverse osmosis - 100,

$55.00
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Gpd membrane reverse - 75,

Gpd membrane reverse - 75,

$13.99
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Aquatic life buddie stage - aquatic, ro

Aquatic life buddie stage - aquatic, ro

$119.99
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Replacement filters for - replacement,

Replacement filters for - replacement,

$59.99
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Stage under sink - 3/4/5/6,

Stage under sink - 3/4/5/6,

$35.95
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Aquarium coral reef reverse - coral,

Aquarium coral reef reverse - coral,

$205.00
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Aquarium reef coral reverse - coral,

Aquarium reef coral reverse - coral,

$178.00
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Prthoring7 ring kit - prthoring7,

Prthoring7 ring kit - prthoring7,

$14.99
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Aquarium reef reverse osmosis - aquarium,

Aquarium reef reverse osmosis - aquarium,

$145.00
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Resin filter clear - di,

Resin filter clear - di,

$29.00
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The shark 600 gpd - the,

The shark 600 gpd - the,

$1080.00
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Aquarium reef reverse osmosis - aquarium,

Aquarium reef reverse osmosis - aquarium,

$149.99
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Stage reverse osmosis rodi - 4,

Stage reverse osmosis rodi - 4,

$68.99
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Adapter valve garden laundry - adapter,

Adapter valve garden laundry - adapter,

$24.99
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Geekpure inch deionization - geekpure, 10

Geekpure inch deionization - geekpure, 10

$42.99
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Stage reverse osmosis system - 4,

Stage reverse osmosis system - 4,

$30.99
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Gpd membrane water - membrane,

Gpd membrane water - membrane,

$21.99
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Premier stage aquarium - 5-stage, reef

Premier stage aquarium - 5-stage, reef

$134.99
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Portable aquarium - portable, ro/di

Portable aquarium - portable, ro/di

$123.99
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Stage aquarium - 7,

Stage aquarium - 7,

$200.00
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150 gpd membrane reverse - ro,

150 gpd membrane reverse - ro,

$34.80
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Stage reverse osmosis - stage,

Stage reverse osmosis - stage,

$35.99
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Pack shut off float - off, valve

Pack shut off float - off, valve

$18.50
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Premier stage aquarium reef - 6,

Premier stage aquarium reef - 6,

$149.99
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Mixed bed deionized di - 5,

Mixed bed deionized di - 5,

$44.99
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Aquarium reverse - 4, ro/di

Aquarium reverse - 4, ro/di

$52.99
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Stage pro di - stage, ro/di

Stage pro di - stage, ro/di

$310.95
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Liquagen stage premium 100 - liquagen,

Liquagen stage premium 100 - liquagen,

$230.99
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📊96 listings · from $13.11 · avg $151.91

Browse 96 ro di system listings currently in our index. Prices range from $13.11 to $1080, with an average of $151.91. 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 di system →

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Everything you need to know about ro di system

Whether you are looking for a brand-new or second-hand ro di system, 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 $13.11, while premium listings can reach $1080 — giving you a wide budget spread to work with. The average price of $151.91 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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