ProOne Big+ Gravity Filter
Polished-stainless gravity dispenser (formerly Propur) whose filtered water sits in a steel chamber; only the G2.0 filter elements carry plastic housing.
The verdict: Minimal plastic contact
Both chambers of this 3-gallon dispenser are polished stainless steel, so filtered water dwells in and pours from steel. The G2.0 all-in-one filter elements have plastic end caps/housing that the water passes through as it's filtered (the standard cartridge concession), and the spigot on some configurations is plastic - together that's what lands it at minimal-contact rather than no-contact, though it's far less plastic than a plastic pitcher. Verify the spigot at purchase if that matters to you. Certified to NSF/ANSI 401 for microplastics.
Verification: Manufacturer confirmed
What it's made of
| Part | Material | Water contact |
|---|---|---|
| upper chamber (unfiltered) polished stainless steel; grade unspecified | Stainless Steel grade unspecified | Yes primary |
| lower chamber (filtered water reservoir) filtered water sits here before dispensing; grade unspecified | Stainless Steel grade unspecified | Yes primary |
| G2.0 filter elements activated-carbon/ceramic-shell all-in-one element; water passes through | Activated Carbon | Yes primary |
| filter housing / mounting hardware BPA-free plastic end caps and wing nuts that seat the elements; specific resin not confirmed | Plastic other / unspecified | Yes primary |
| spigot base configurations ship a plastic spigot; a stainless upgrade spigot is sold separately - confirm which you are buying | Plastic other / unspecified | Yes primary |
ProOne's stainless gravity dispenser (the brand was formerly Propur) holds 3 gallons across two polished-steel chambers. Water gravity-feeds through the brand's G2.0 all-in-one elements, which combine activated carbon with an outer shell, into the steel lower chamber. It is IAPMO-certified to NSF/ANSI 42, 53, 401, and 372, covering chlorine, lead, PFAS, and microplastics. G2.0 elements last up to about 9 months, and it runs entirely on gravity - no electricity.
Pros
- Filtered water sits in a stainless steel chamber
- IAPMO-certified to NSF/ANSI 401 (microplastics) and 53 (lead/PFAS)
- G2.0 elements last up to ~9 months
- Runs without electricity
Cons
- Stock spigot is plastic on base configurations; stainless is an upsell
- Bulky countertop footprint
- Slow gravity flow
Categories: Water Filters
Sources
Every material claim above is backed by these. This is the scattered info we centralized.
- manufacturer https://prooneusa.com/product/big-plus/ polished stainless steel chambers; IAPMO/NSF-ANSI 42, 53, 401, 372 certification; G2.0 element life
- review https://www.amazon.com/ProOne-Brushed-Stainless-Countertop-Gravity/dp/B08L5KJH8M listing confirms stainless-steel dispenser certified to reduce lead, total PFAS, and microplastics
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