Name: Pentair Pentek FloPlus Protect 20BB
Brand: Pentair
Price: 258.00 USD

For a smaller home where PFAS in the water is the main worry. Its low flow rating suits one or two bathrooms.

Price checked November 2, 2026. As an Amazon Associate we earn from qualifying purchases.

Pros

A 1 micron carbon block aimed at PFAS, with a stated certification to NSF/ANSI 53
One cartridge to swap about once a year
Pentair big blue housings are a long standing standard size

Cons

The 5 gpm rating is low for a whole house; two showers at once may drop pressure
Each cartridge costs about $190 for 40,000 gallons, a high running cost
No published warranty

How it scores

The rating comes from 5 measured or published factors, each scored 0-100 against fixed reference points for its build. How we rank explains each one.

Specifications

Filtration
Model number	150736
Capacity	40,000 gallons
Replacement filters or media	$187.46
Running cost	$4.69 per 1,000 gal
Stages	1
Chloramine	No
PFAS	Yes
Build
Flow	5 gpm
Ports	1 in
UV stage	No

A tidy, frame mounted three stage system for city water with some grit. Its certification claim is vague.

$469.99

For homes worried about lead pipes or with chloramine treated water. The lead claim is not certified, so test the water if lead is the main concern.

$230.99

A cartridge system built for chloramine treated city water, with a longer warranty than most at this price.

$375.68