Waterdrop Plus WDP-F19C Refrigerator Water Filter: fit and specs

The Waterdrop Plus WDP-F19C is a replacement water filter cartridge for refrigerators that use the GE RPWF or RPWFE style filter. It is sold as a twin pack (the packaging may vary), and it is meant to be swapped in at the interval the fridge reminds you about. It is a part, not a stand-alone appliance, so fit is the main thing to get right.

What it is made to replace

Waterdrop lists the WDP-F19C as a replacement for GE RPWFE, RPWF, WSG-4, DWF-36, WF277, R-3600, MPF15350, OPFG3-RF300, RWF1063 and RWF3600A. It also gives a long list of compatible refrigerator models, including GFE28GBLTS, GFE28GSKSS, PFE28KMKES, GFD28GYNFS, GYS22GMNES, DFE28JBLTS and GNE29GYNFS. GE is a trademark of its owner and is used by Waterdrop for reference only.

The RPWF-style filters normally include an electronic chip that lets the fridge track usage, which is why this listing mentions a chip. Check your fridge's manual or the label inside the compartment to confirm which filter type it takes.

Filter media and certifications

Waterdrop says the cartridge uses coconut-shell carbon blocks with an enlarged surface area and many micropores, in a BPA-free, food-grade housing. The brand states that its filters are certified by NSF and IAPMO against NSF/ANSI 401, 53, 42 and 372, covering the reduction of 35 substances.

Specific figures the brand gives include:

• NSF/ANSI 53 reductions of 99.6% for lead, 96.6% for benzene and 92.3% for mercury.
• NSF/ANSI 401 reduction of 99.2% for bisphenol A, phenytoin, estrone and naproxen.
• A 95.3% reduction in PFOA and PFOS in third-party lab testing.
• IAPMO certification for 20 further substances.

These are the manufacturer's claims, and results depend on your water supply. NSF/ANSI 42 generally relates to chlorine, taste and odour, while 53 and 401 cover other contaminants. Waterdrop also says the filter lets many beneficial minerals through.

Flow and sealing

Waterdrop says the cartridge is engineered to fit tightly and avoid leaks, with fine pores that keep the flow smooth. A well-fitting cartridge matters because a loose one can drip behind the grille, so seat it fully and follow the twist-and-lock steps in the fridge manual.

When to change it

The brand recommends replacing the filter after 4,800 cups (300 gallons) or six months, noting this can vary with local water conditions. Each filter comes with installation stickers so you can write the change date on the unit. Running a filter beyond its date can reduce filtration performance, as Waterdrop notes.

If the "Replace Water Filter" light stays on after a change, the listing says to hold the Water button for three seconds until the dispenser gives a confirming tone.

What to check before you buy

• Your fridge's exact model number against the compatibility list.
• Whether your fridge takes a chip-equipped filter of this style.
• How many filters you receive: it is a two-pack, and packaging may vary.
• Your usual water use, since six months is the maximum interval.
• The filter-reset steps in your manual.
• That you remove packaging and flush the filter as the instructions describe.

The short version

• Waterdrop Plus WDP-F19C is a replacement filter for many GE RPWF/RPWFE-type refrigerators.
• Waterdrop cites NSF/ANSI 401, 53, 42 and 372 certification and IAPMO testing.
• Coconut-shell carbon block in a BPA-free, food-grade housing.
• Rated at 300 gallons or six months, whichever comes first.
• Match your model number before ordering.

Bloiq is reader-supported. Some links may earn us a commission; it never affects what we write. How we make money.