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Waterdrop AP431 AP430SS Whole House Scale Inhibitor Filter, Heater Softener System, Prevent Scale Build Up On Hot Water Heaters, Pipes and Boilers

  • Based on 621 reviews
Condition: New
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Availability: 20 left in stock
Fulfilled by Amazon

Arrives Sunday, Jun 22
Order within 18 hours and 44 minutes
Available payment plans shown during checkout

Features

  • Efficient Scale InhibitionFood-grade polyphosphates, included in the Waterdrop scale inhibitor, can fundamentally inhibit scale formation to provide healthy water for you. This is a highlight different from conventional filters.
  • Energy ConservationThis scale inhibitor can protect your water heater, dishwasher, boilers, downstream plumbing fixtures like faucets and shower heads from scale buildup while improving the efficiency of electrical appliances, and extending their life.
  • High Flow Rate3/4 " NPT inlet/outlet ensures high flow rate of 10 GPM to keep stable water pressure. This scale inhibitor system can be installed on any pipeline adaptive to its interface.
  • Premium MaterialThis scale inhibitor system is equipped with a durable and anti-rusting 304 stainless steel adapter. Besides, its food-grade and BPA-free materials safeguard healthy water. Please note - this system is NOT a regular pre-filter. So it doesn't force all the water through the filter like a normal filter. Only a portion of the source water will flow through the filter to absorb food-grade polyphosphates for better filtration.
  • Longer LifespanEnjoy purified water with this inline scale inhibition system. Every water cartridge can last for 6 months for regular use, which may vary based on local water quality. Please maintain this scale inhibitor system in an upright position during installation to get better inhibition effect. Be sure to install this system on a cold water supply line that supplies water to a water heater.
  • Included Components:3/4 NPT inlet/outlet connection, Replacement Cartridge*1. Please NOTE, Waterdrop is an independent brand. The model name of this product is WD-W65.

Material: Stainless Steel and Food-grade polyphosphates


Product Dimensions: 2.5"D x 2.5"W x 12.5"H


External Testing Certification: RoHS


Product Benefits: Inhibits Lime-Scale Growth


Brand: Waterdrop


Material: Stainless Steel and Food-grade polyphosphates


Product Dimensions: 2.5"D x 2.5"W x 12.5"H


External Testing Certification: RoHS


Product Benefits: Inhibits Lime-Scale Growth


Brand: Waterdrop


UPC: 840814194058


Unit Count: 1.0 Count


Number of Items: 1


Item Weight: 1.87 pounds


Manufacturer: Waterdrop


Item model number: WD-W65


Date First Available: November 26, 2020


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Sunday, Jun 22

Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.

To initiate a return, please visit our Returns Center.

View our full returns policy here.

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Leasing options through Acima may also be available during checkout.

Learn more about financing & leasing here.

Top Amazon Reviews


  • Easy and practical
Perfect fit each time, and ease of removal and installation of the filter! Good quality and price!
Reviewed in the United States on April 11, 2025 by Miguel Gonzalez

  • Good product. Works well!
Good product
Reviewed in the United States on November 7, 2024 by Billy

  • Annual Filter Change
I changed the Filter on my Navien heating system as required yearly. The price was reasonable and the filter was a perfect replacement.
Reviewed in the United States on January 8, 2025 by Poppa

  • I love Waterdrop !
This is my second Waterdrop product. I also have an under sink filtration system. This scale inhibitor is a must when installing a tankless water heater to prolong the life of your water heater. Others have reported leaks at the threads, but if you use a good amount good teflon tape & tighten appropriately, you should be fine. Other than that, nothing else I can report on until about a year when its time to flush out my tankless heating system. Eddie K out !! ... show more
Reviewed in the United States on January 28, 2025 by Eddie K

  • Waterdrop doesn't disappoint
Just installed for my propane instant water heater. Was a breeze. Will update in a few months, after some testing.
Reviewed in the United States on April 4, 2025 by Jeremy Roberts

  • Water filter
An inline water filter to filtrate your lead water. I mean water to make it taste better or something. I don't know how well it works. I have not got to hook it up yet. I'm gonna say it's gonna work good though, what do you think
Reviewed in the United States on March 24, 2025 by It looks like good quality. I haven't used it yet, so I can't really say much.

  • Amazing customer service
My filter cracked when installing it seems the plastic was damaged and I was able to exchange it and received it the next day. It's working like a charm.
Reviewed in the United States on May 9, 2024 by Marcy

  • Seems to work
Lost one due to hard to thread but the filters work you can feel the difference in the water so we will see how long they last our water in San Diego CA is pretty hard
Reviewed in the United States on March 18, 2025 by Amazon Customer

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