Protec PDC51 Demineralization Cartridge

OEM part number(s):

PDC51PDC51V1DC-51 (ReliOn / Walgreens / Sunbeam)

Made by Protec (Kaz) for Vicks ultrasonic models. Replacement interval: Replace every 2–4 weeks or every 15–30 fillings (FiltersFast spec)..

Exact fit — verified

Fits 4 models

Across 2 brand(s): Sunbeam, Vicks. Examples: 696, V4600, V5100, VUL575 — the complete verified fit list is on this page.

Cross-brand equivalents

No verified aftermarket equivalent is published for this part — genuine only, as far as published data shows.

Prices checked 2026-11-11: no verified in-stock price was captured — we never guess one. See the price notes below.

Buy on Amazon — PDC51

Amazon is a buy link, not a price claim: Amazon blocks automated price reads, so its price is never quoted here.

Exact fit — all 4 verified models

Harvested from published manufacturer and retailer fit lists (sources at the bottom of this page). If your exact model is not listed, do not assume fit — check the number on your current part.

Sunbeam (1)

696

Vicks (3)

V4600

V5100

VUL575

All verified prices

Kind	Store	Pack	Price	Shipping	Checked

FiltersFast lists the genuine PDC51 at $19.95 but it was OUT OF STOCK when checked 2026-11-11, so no in-stock shipped price is quoted here. A Kaz parts listing showed $13.92 for PDC51V1; not treated as verified retail stock.

Specs

Replacement interval	Replace every 2–4 weeks or every 15–30 fillings (FiltersFast spec).
Treatment / media	Demineralization cartridge: reduces minerals that cause white dust from ultrasonic humidifiers.
Quantity note	One cartridge in the tank cap area per change.