ProMax Under Counter Water Filter

(3 customer reviews)




Designed to be installed under counter with a separate faucet or inline with the water supply line.


-Single-stage design (optional dual stage)
-Premium quality ABS housing and fittings
-BPA & BPS free
-Mounting bracket, 3/8” quick connect fittings, 6’ pc of 3/8” polyethylene tubing, wrench, and chrome plated lead-free faucet kit included
-ProMaxTM “all-in-one” water filter technology
-No electricity required
-Easy to replace filter element
-Overall size is 4.5″ x 13″
-Replacement Filter: PMC-34RF


Optional Faucet:

Chrome finish
Flip-up handle for continuous use
Push down handle for water on demand


ProOne® Under Counter Water Filtration System w/ ProMaxTM filter technology. Helps reduce/remove a broad range of over 200 contaminants including VOCs, lead, fluoride, heavy metals, pesticides, SVC’s, disinfectants, inorganic non-metallics, herbicides, pharmaceuticals, PFOA, PFOS, and microplastics. Tested to NSF/ANSI-42 & 53 standards. See ProMaxTM Lab Report for details.


ProMaxTM  Under Counter Specifications:

-Type of installation: Under Counter
-Maximum Working Pressure: 860 Kpa (125 psig)
-Minimum Working Pressure: 137 Kpa (20 psig)
-Maximum Working Temperature: 38° C (100° F)
-Minimum Working Temperature: 5° C (41° F)
-Recommended Flow Rate: 0.2 – 1.0 gpm
-Contaminant Reduction: Refer to Lab Report
-Filter Life Expectancy: Up to 900 gallons or 1 year
-Replacement filter: PMC34RF


ProMaxTM  Dual Stage:

Stage 1 includes a 5-Micron standard pre-sediment filter which helps protect your new ProOne® filtration system from sediments commonly found in aging water supply pipes. Reduces damaging effects of sediment such as dirt, sand, debris, and rust. Ideal for use with most city or well water.


Stage 2 includes ProMaxTM “all-in-one” filter technology.



Click here for lab report

Click here for instructions

Click here for filter technology comparison chart

Additional information


Single Stage, Dual Stage

Faucet Options

With Faucet, Without Faucet

Currently no frequently asked questions available for this product.
Feel free to contact for any questions you may have!

3 reviews for ProMax Under Counter Water Filter

  1. Elizabeth Miranda Monterrosa (verified owner)

    We used the gravity filters for years, which worked but were very large for our counters. I was tired of looking at it and bought this instead. Great idea. Works amazingly. Takes up no space. We got the sediment filter as we live in Central America and the sediment is heavy to the point of clogging faucets at times. The sediment filter works like a charm. No complaints except that I wish I had bought sooner. The gravity filter still gets used occasionally and the pitcher travels with us. So we’re still making good use of all our propur products. And I recommend them all to everyone all the time.

  2. Gareth Quiggan

    Absolutely excellent filter, great taste and very thorough. Bought one for each bathroom in my house and for my daughter’s new home. We’re now in our third year of using them with zero problems and great performance. Easy to install and easy to maintain. My family is very happy knowing that we are drinking the safest water possible, as our ProMax removes hundreds of contaminants while leaving all of the important minerals and nutrients in place and producing ph., neutral water. I highly recommend ProOne filters: they are absolutely unsurpassed.

  3. Lorri Vogel

    After much research landed on ProOne for the effectiveness of their filters. I have had it for several years and replaced the filter yearly. I am so satisfied with the quality of water it produces.

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