Waterdrop X8-WAN Alkaline Tankless Reverse Osmosis System
- Reverse osmosis, under-sink install
- 800 gallon capacity
- BPA free material
- 18.2 x 6.25 x 16.72 in, **16.03 lb**
Last refreshed Aug 4, 2026 · Based on the Amazon listing and published specifications, not hands-on testing.
The smaller-capacity sibling in this under-sink reverse osmosis line, with the same body size and a lower gallon rating. Flow, TDS limit and box contents are missing from the listing.
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ASIN: B0DT3JP7Q8Model: WD-X8Category: Water Filtration Systems
Overview
Waterdrop offers the WD-X8-WAN as a reverse osmosis system for the cabinet beneath a kitchen sink. Tap water goes through a membrane and on to a single tap, and the listing names BPA free material.
The gallon rating is the lower of the two in this line, while the body is the same size, so the choice comes down to how long you want between replacements. The listing offers no certification, flow rate or included-parts detail.
Who it's for
A homeowner with room under the sink who accepts a shorter capacity rating can use this version. Renters and buyers who want documented flow, certification or a ready kit should shop for a better-detailed model.
Pros and cons
- Reverse osmosis purification
- BPA free material listed
- Lighter than the larger model
- Lower gallon rating
- Flow rate not stated
- Accessories not itemized
Performance notes
A membrane rejects dissolved solids as water is pushed through at line pressure, and the rating describes how much it treats before service. Supply pressure and TDS decide output speed, and the listing gives neither.
Specifications
| Brand | Waterdrop |
|---|---|
| Model | WD-X8 |
| Dimensions & fit | |
| Dimensions | 18.2 x 6.25 x 16.72 in |
| Weight | 16.03 lb |
| Capacity & performance | |
| Capacity | 800 gallonshigher than 98% of 46 water filtration systems |
| Construction & materials | |
| Material | BPA free |
| Compatibility & installation | |
| Installation Type | Under-sink |
| Other details | |
| Purification | Reverse osmosis |
Closest rivals on specs
iSpring CRO1000 Commercial Reverse Osmosis System- Capacity 800 vs 1000 gallons (-20%)
- Weight 16.03 vs 20.5 pounds (-22%)
Ecoviva WP-RO-600G-W Water Filtration System- Capacity 800 vs 600 gallons (+33%)
- Weight 16.03 vs 25 pounds (-36%)
iSpring RO500AK Alkaline Reverse Osmosis System- Capacity 800 vs 500 gallons (+60%)
- Weight 16.03 vs 21 pounds (-24%)
Frequently asked questions
How often should I service the Waterdrop WD-X8-WAN?
The listing gives no change interval. Use the manual that ships with it, and treat the 800 gallon rating as the upper limit.
Is the WD-X8-WAN a faucet or pitcher filter?
No. It is an under-sink reverse osmosis system.
Are faucet and tubing included?
The listing does not itemize included parts.