How often do I replace the filter?

ProPur rates the ProOne 7 filter for about 6 months of use. Replace it sooner if flow slows noticeably or you filter heavily contaminated water.

Does it remove fluoride?

Yes. The ProOne 7 2-in-1 filter is rated to reduce fluoride along with bacteria, cysts and heavy metals.

Do I need electricity or plumbing?

No. It is a gravity system, so it needs no power or faucet connection. You pour water in the top and it drips through.

How many people does it serve?

The 3-gallon capacity is recommended for households of four or more. You can add up to two more filters to raise output.

Can I use it with well or rainwater?

Yes. ProPur lists tap, lake, river, stream, pond and rain water as acceptable sources.

Is $229.95 a good price?

That is the best new price among three stores as of November 6, 2026. Compare it with the cost of replacement filters, which you will buy about twice a year.

What do buyers say about the ProPur ProOne Big+ Gravity Water Filter System?

Buyers like: Water tastes amazing; Husband who thought tap water was fine admitted filtered water tastes much better; Feels happier with children drinking clean filtered water.

Where can I buy the ProPur ProOne Big+ Gravity Water Filter System?

4 stores we checked sell it, including PureWaterFreedom.com, ProOne Water Filters, FiltersFast.com, Amazon.

ProPur ProOne Big+ Gravity Water Filter System

Q: Where is the ProPur ProOne Big+ Gravity Water Filter System cheapest?

At Amazon, for $229.95, as of our latest check.

Best price now

$229.95at AmazonObserved at 7:04 AM

Compared across 4 stores. Prices are checked against each store and labelled with when.

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Our take on the ProPur ProOne Big+ Gravity Water Filter System

The ProOne Big+ is a gravity-fed countertop filter with a 3-gallon 304 stainless steel body and no electricity needed. Its ProOne 7 2-in-1 filter combines silver-impregnated ceramic with AquaMetix media to target bacteria, cysts, fluoride and heavy metals, and the system can be expanded to hold up to three filters. It suits households of four or more, and it can also treat tap, lake, river, stream, pond or rain water. The best new price is $229.95 at Amazon as of November 6, 2026, with three stores listing it new.