Express Water · Updated July 2026
Express Water RO5DX: price & specs
The Express Water RO5DX costs $189.99, the cheapest reverse osmosis systems (median $445). It earns a Gold Deskmark — 75/100 pay-blind standing, #2 of 10 in class.
Verified Jul 11, 2026 · figures linked to their source in the table below
Express Water RO5DX. Every price and spec below is linked to its source and dated — no guesses.
Source: expresswater.com verified ✓ corroborated verify in ledger
Is the Express Water RO5DX a good buy?
At $190, the Express Water RO5DX is the cheapest of the 8 reverse osmosis systems we track, where the median is $445. On the spec sheet, its filtration stages of 5 is at the median of the 10, its rated capacity gpd of 50 is at the median of the 7, and its storage tank gal of 3.2 is at the median of the 9.
Specifications
| Price (US) | $189.99 US MSRP $189.99 listed verbatim on the Express Water manufacturer product page (SKU# RO5DX, "$189.99" / data-price-raw="$189.99"). Amazon showed only EUR pricing for German delivery, so the manufacturer USD figure was used. |
|---|---|
| Brand | Express Water |
| Released | — |
| Install type | under-sink |
| Filtration stages | 5 |
| Rated capacity gpd | 50 |
| Pure to drain ratio | — |
| TDS reduction pct | — |
| Remineralization | No |
| Requires electricity | No |
| Storage tank gal | 3.2 |
| Nsf certified standards | 58, 372 |
| Membrane life months | — |
| Annual filter cost usd | — |
Source: expresswater.com (verified 2026-07-11) · corroborated by amazon.com. The Express Water manufacturer product page confirms the exact model (SKU# RO5DX) as a 5-stage under-sink reverse osmosis system priced at $189.99, describing reduction of up to 99.99% of contaminants. The Amazon retailer listing corroborates the identical model in its title ("Express Water RO5DX 5-Stage Under Sink Reverse Osmosis Water Filter System, NSF Certified 372 & 58, 50 GPD") and supplies the 50 GPD rating, NSF 372 & 58 certification ("meet or exceed NSF standard 58"), the "4 gallon (3.2 gallon water capacity) storage tank", and "Operates on 40-80 psi water pressure" (line-pressure, no electricity). Both pages agree this is the base RO5DX (distinct from the RO10DX or alkaline G-series variants); TDS %, membrane-life months, drain ratio, and annual filter cost were not stated by the manufacturer, so they remain null.
Is the Express Water RO5DX worth it vs cheaper reverse osmosis systems?
Express Water RO5DX against its closest cheaper and pricier reverse osmosis systems on the specs that matter — every value sourced. See all 8 ranked →
| Product | Price | Install type | Filtration stages | Rated capacity gpd | Remineralization | Requires electricity |
|---|---|---|---|---|---|---|
| Express Water RO5DX this | $189.99 | under-sink | 5 | 50 | No | No |
| APEC Essence ROES-50 | $230.99 | under-sink | 5 | 50 | No | No |
Frequently asked questions
How much does the Express Water RO5DX cost?
The Express Water RO5DX has a US price of $189.99 (US MSRP $189.99 listed verbatim on the Express Water manufacturer product page (SKU# RO5DX, "$189.99" / data-price-raw="$189.99"). Amazon showed only EUR pricing for German delivery, so the manufacturer USD figure was used.), as of 2026-07-11.
How does the Express Water RO5DX compare on price?
At $190, the Express Water RO5DX is the cheapest of the 8 reverse osmosis systems we track, where the median is $445.
What are the Express Water RO5DX's key specs?
Express Water RO5DX (Express Water): installType under-sink, filtrationStages 5, ratedCapacityGpd 50, remineralization No, requiresElectricity No. Full sourced spec sheet verified 2026-07-11.
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