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FREE 30-day refund/replacement
To qualify for a full refund, items must be returned in their original, unused condition. If an item is returned in a used, damaged, or materially different state, you may be granted a partial refund.
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Availability:
20 left in stock
Arrives
Oct 27 – Oct 28
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Features
- 【Efficient Scale Inhibition】Food-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 Conservation】This 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 Rate】3/4 " 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 Material】This scale inhibitor system is equipped with a durable and anti-rusting 304 stainless steel T-fitting. 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 Lifespan】Enjoy 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
Model Number: WD-8065S
Product Benefits: Inhibits Lime-Scale Growth
Brand Name: Waterdrop
Number of Packs: 1
Item Highlight: Heater Softener System, Aqua-Pure® AP430SS Replacement, Prevents Scale Build Up On Hot Water Heaters, NSF/ANSI 372 Certified
Set Name: Single
UPC: 840814194058
Unit Count: 1 Count
Number of Items: 1
Included Components: 3/4” NPT inlet/outlet connection, Scale inhibition system *1
Manufacturer: Waterdrop
Manufacturer Part Number: WD-W65
Material Type: Stainless Steel and Food-grade polyphosphates
Compatible Water Purifier Models: 3M AP430SS
Item Dimensions D x W x H: 2.5"D x 2.5"W x 12.5"H
External Testing Certification: RoHS
Frequently asked questions
If you place your order now, the estimated arrival date for this product is:
Oct 27 – Oct 28
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.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
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Top Amazon Reviews
Re-doing my product review , after a failed attempt to make this item work , I made a " bad " review on this item , after posting it here , I got an email from Kimberly from Customer Service to let me know she could send me a new filter set up If I would give them an other chance , I said yes , next day or two I had a new box with a new filter set up , I got really impress by the way they wanted to make things right about their product , so After few days , I finally got to do another set up with the filter on the new tankless water heater in my house , set up was easy this time after Kimberly gave me some pointers of what I should do this time in order to not have a leak , I fallow her instructions and I am happy to say that the system works as advertised ! No leaks and I am really happy that the new set up works perfectly ! Thanks to Kimberly for her time and effort to make things right on their product . Recommend it 100% !
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Reviewed in the United States on July 29, 2025 by oscar lara
Update: I was able to get in contact with their customer service. They sent me a new unit which arrived in a couple of days. Installed exactly the same way as I tried with the first one, but no leaks this time! I'm not sure why there's some issues with these units. It looks like other reviewers had issues too but they were also fixed with a new unit. Thank you waterdrop customer service! I installed the whole house scale inhibitor filter, but unfortunately it's leaking. I've clamped the fittings, but unfortunately water leaks from the waterdrop unit. I haven't had luck reaching customer support leaving a review here as that seems to have worked for others.
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Reviewed in the United States on October 16, 2025 by customer
Easy to install with no leakage. Haven't had to replace the cartridge yet, but should be no problem. My well water is from a 1950's well, so.... It will get a large number of replaced cartridges.
Reviewed in the United States on August 24, 2026 by Pam K
Save yourself a headache — ditch the included Teflon tape immediately. Whoever thought that tape was adequate for metal-on-metal threaded connections clearly never wrestled with brass fittings at 11pm with water everywhere. It's fine for PVC, but on brass-to-metal SharkBite threads? Absolute garbage. After redoing the connection 2-3 times and questioning my life choices, I switched to a non-toxic Teflon-based pipe sealant compound and it sealed first try. The tee itself is solid, but don't let that tape anywhere near your brass fittings unless you enjoy mopping up water and starting over.
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Reviewed in the United States on March 2, 2026 by james roberts
This scale inhibitor has a major defective flaw. It leaks. I've been plumbing my whole life and it is rare that any part of a job needs to be taken apart to fix a leak in the job. This job had two leaks. Two of them. Both on the T connection of this scale inhibitor. I wrapped the nipples with several wraps of a quality teflon tape and both of them are leaking. I swear I wish manufacturers would test their items before they sell them. I don't know if this leak can be stopped because the thing has been wrapped with plenty of teflon tape. I will take it apart and see if more will fix it. If it doesn't, this will be returned for something that works. It's not like I don't know what I'm doing either. I soldered over ten seperate joints and had twelve other screw together fittings on this tankless water heater install. This company's T fitting leaked on both sides. Both of them. I am so pissed right now.
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Reviewed in the United States on November 3, 2025 by pounder
I’m an HVAC technician. I am using this for my plate heat exchanger, which is in charge of the hot water for my entire house. I have installed many like it in other houses. The competitors have a very similar design but a much higher price tag. With a lot of stuff I sell out in the field I like to try it in my own house first. That being said, this seems like a good less expensive option. So far, I would recommend it. A little pro tip I found the easiest way to change the cartridge is to install two ball valves on either side. It’s a little bit more work upfront and may cost a little bit more for the plumbing fittings, but when it comes time to change the cartridge out, you can do it seconds.
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Reviewed in the United States on March 26, 2026 by Piper
Simple to install, nice and tight, time will tell if it is effective.
Reviewed in the United States on May 28, 2026 by Peter D.
Esto es mi opinión sobre este producto, yo le doy tres estrellas. Cuando tú lo vas a conectar es muy frágil, puede romperse si no tienes suficiente experiencia conectándolo, pero es un buen producto. Lo que siento que es un poco malicioso es que solamente utiliza un solo filtro específico, lo que significa que te obligan a comprar el filtro exactamente de esa marca ya que casi cuesta lo mismo que la pieza completa entera. No tiene mucho sentido para mí, pero funciona y hace lo que tiene que hacer. Si a ti no te importa comprar los filtros, este es tu producto. Realmente yo lo veo malicioso porque no te da opciones para comprar filtros más baratos, pero si no te importa gastarte eso, adelante. Hace lo que tiene que hacer, filtra el agua como debe y cumple exactamente. Esta es mi opinión personal desde mi experiencia usándolo y viendo cómo funciona.
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Reviewed in the United States on July 18, 2026 by Felix Rodriguez Collado