Both are certified to NSF/ANSI 58, the reverse osmosis standard. The real difference is where they live and how much water you need.
Side by side
| G3P800 | AquaTru Classic | |
|---|---|---|
| Type | Tankless, under the sink | Countertop |
| Install | Under sink, faucet hole, outlet | None: plug in and fill |
| Output | 800 GPD on demand | Batches; 0.75 gal clean tank |
| Pure to drain | 3:1 | 4:1 (claimed) |
| Certified to | NSF/ANSI 42, 53, 58, 372 | NSF/ANSI 42, 53, 58, 401 |
| Price | $999 list | $475 list |
Installation
The G3P800 needs a cabinet with an outlet and a hole for its faucet. The AquaTru needs a spot on the counter and an outlet, and nothing else.
How much water
The G3P800 makes water on demand at 800 gallons a day. The AquaTru fills a 0.75-gallon clean tank per batch, which suits one or two people.
Which should you buy?
Choose the G3P800 if
You own your home and want fast, unlimited RO water.
Choose the AquaTru Classic if
You rent or don't want to plumb anything.
Questions
Which removes more?
Both are certified to NSF/ANSI 58. Check each listing for the specific contaminants you care about.
