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💧 Keep your water flowing smooth and your appliances thriving—because scale is so last season!
The Waterdrop AP431 Replacement Cartridge is a premium scale inhibitor designed to protect water-using appliances by preventing corrosion and limescale buildup. Featuring BPA-free, anti-burst housing and delivering a fast flow rate of up to 10 GPM, it ensures safe, efficient water filtration. Compatible with multiple 3M Aqua-Pure models, this cartridge offers a reliable 6-month lifespan for consistent performance and peace of mind.
| Asin | B089W9TSJG |
| Best Sellers Rank | #14,193 in Tools & Home Improvement (See Top 100 in Tools & Home Improvement) #104 in Replacement Under-Sink Water Filters |
| Brand Name | Waterdrop |
| Compatible Water Purifier Models | 3M SF18-S |
| Customer Reviews | 4.6 4.6 out of 5 stars (1,095) 4.6 out of 5 stars |
| External Testing Certification | RoHS |
| Included Components | Scale Inhibitor Cartridge*1 |
| Item Dimensions D X W X H | 2.56"D x 2.56"W x 9.45"H |
| Item Highlight | Hot Water Scale Inhibitor for Aqua-Pure® AP430SS, Prevent Scale Accumulation and Protect Water Heaters |
| Item Weight | 16 ounces |
| Manufacturer | Waterdrop |
| Manufacturer Part Number | WD-AP431 |
| Material Type | food-grade polyphosphates |
| Model Number | WD-W65 |
| Number Of Items | 1 |
| Number Of Packs | 1 |
| Product Benefits | Prevent Scale Accumulation |
| Set Name | Aqua-Pure AP431 |
| Unit Count | 1 Count |
| Upc | 840814177495 |
User
Great replacement - fits perfectly and works well
This Waterdrop AP431 replacement cartridge is an excellent alternative to the OEM Aqua-Pure AP431 filter. It fits my whole house water filter system perfectly with no modifications needed—drops right in just like the original cartridge.The water quality after installation is noticeably improved with better taste and clarity. No chlorine taste or odor, and the flow rate is excellent. The filtration performance seems just as good as the original filters but at a much better price point.The build quality is solid with good materials and construction. The threads sealed properly without any leaks, and the cartridge housing feels sturdy. Installation was quick and straightforward—just standard filter replacement procedure.I've been using these Waterdrop replacements for several cycles now and they consistently perform well. The longevity seems comparable to OEM filters, making them an even better value. No decrease in water pressure or quality over the filter's lifespan.For anyone looking to save money on replacement water filters without sacrificing quality, these Waterdrop cartridges are the way to go. They work just as well as the brand name filters at a fraction of the cost.
User
Very Good Item
I was hesitant at first but I figured let me purchase it as the price offered was reasonable compared to 3M. Fortunately, I replaced the 3M with the Waterdrop and very pleased how easily the groove fit into the connection and the quality of the product has made quite a significant difference.
User
Your service
Fit great
User
De-salinater for tankless water heater
It was the exact replacement for my tankless water heater de-salinator. It works well, delivered fast& good price from Amazon.
User
Good
Fits and seams to work just fine.
User
Great company and product
Great company to purchase from and work with. I ordered a 3 pack of filters, and one came damaged. They were extremely easy to contact. Their communication was fast, and efficient and had a new filter sent out within 2 days over a holiday weekend.The filters themselves are great quality, and easy to use. I will definitely me buying from them in them regularly.
User
Seems to work
Seems to work fine and hopefully helps a little with the scale. Needs to be tightened really well and plumber’s tape helps
User
water attachment
fast & great addition to my water heater, easy to attach
User
Good price
Just as good as the brand name stuff
Trustpilot
1 week ago
1 day ago