Will this work mounted on its side, or does it have to be upright?

Dear Tydi, Thank you for your inquiry. Regarding this issue, this whole house scale inline water system can only be installed upright. If you need any further assistance, please feel free to contact us at 1-888-352-3558 (8:00 AM - 5:00 PM PST, Mon - Fri). Thank you. Kind Regards Mia Lauren Customer Service Rep

Dear customer, Thank you for your inquiry. Regarding this issue, this system includes a filter cartridge and 3/4" NPT inlet/outlet connections. Please contact us at 1-888-352-3558 (8:00 AM - 5:00 PM PST, Mon - Fri) if you have any other questions. Thank you. Kind Regards, Mia Lauren Customer Service Rep

what is the reason for only installing on the hot water line? Would like to use for entire house, cold water also.

Hi, Thanks for your interest in our AP431 filter product. Please note that this is only designed for cold water line; it is designed to protect water heater placed after it, thank you. If you have contacted us via email but received no reply, please check the Spam/Junk Folder first. Thank you. If you have any other inquiries, please feel free to contact us. 1-888-352-3558 Kind Regards Mia Lauren Customer Service Rep

Are other parts or items needed? Or can you really filter your entire house water with just this? Where do you install it?

Hi, Thanks for your interest in our product. Please note that this is a scale inhibitor. When using this scale inhibition system, we recommend installing a pre-filter as well.You need to install it behind the water meter. https://www.amazon.com/dp/B08XXJSN29/ If you have any other questions, please feel free to contact us. Enjoy the rest of your day! Kind Regards Mia Lauren Customer Service Rep

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Waterdrop AP431 Whole House Scale Inhibitor with Adapter | Heater Softener System, Aqua-Pure® AP430SS Replacement, Prevents Scale Build Up On Hot Water Heaters, NSF/ANSI 372 Certified

Product ID: 313369634

Details

Brand
Waterdrop
External Testing Certification
RoHS
Material
Stainless and
Product Benefits
Inhibits
Product Dimensions
2.5"D x 2.5"W

🔧Durable 304 stainless steel adapter

⚙️3/4" NPT high flow 10 GPM

🛡️Food-grade polyphosphates inhibit scale

$110.31

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Sold byAmazon USADelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

💧 Scale-free water, stress-free life — upgrade your home’s flow today!

PREMIUM DURABILITY - Constructed with rust-resistant 304 stainless steel and BPA-free materials for long-lasting, safe performance.
SEAMLESS INTEGRATION - Universal 3/4" NPT inlet/outlet ensures easy installation on any compatible pipeline with stable 10 GPM flow.
MAINTENANCE MADE SIMPLE - Replace cartridges every 6 months for continuous scale inhibition and healthier water quality.
EFFORTLESS SCALE DEFENSE - Food-grade polyphosphates actively prevent scale buildup, protecting your entire water system.
BOOST APPLIANCE EFFICIENCY - Extend the lifespan of your water heater, dishwasher, and plumbing fixtures by maintaining optimal water flow.

The Waterdrop AP431 Whole House Scale Inhibitor uses food-grade polyphosphates and a durable stainless steel adapter to prevent scale buildup in hot water heaters and plumbing. Certified NSF/ANSI 372, it supports a high flow rate of 10 GPM via 3/4" NPT connections, ensuring efficient water pressure and extended appliance life. Designed for easy installation and maintenance, each cartridge lasts up to 6 months, delivering healthier, scale-free water throughout your home.

Specifications

ASIN	B08LPBPVPS
Best Sellers Rank	#21,267 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #37 in Under-Sink & Countertop Filtration
Brand Name	Waterdrop
Compatible Water Purifier Models	3M AP430SS
Customer Reviews	4.2 4.2 out of 5 stars (921)
External Testing Certification	RoHS
Included Components	3/4” NPT inlet/outlet connection, Scale inhibition system *1
Item Dimensions D x W x H	2.5"D x 2.5"W x 12.5"H
Manufacturer	Waterdrop
Manufacturer Part Number	WD-W65
Material Type	Stainless Steel and Food-grade polyphosphates
Model Number	WD-8065S
Number of Items	1
Product Benefits	Inhibits Lime-Scale Growth
Set Name	Single
UPC	840814194058
Unit Count	1 Count

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Our prices include the product cost, international shipping, import duties, customs clearance, and local delivery charges. We handle all customs and import procedures, ensuring there are no hidden fees upon delivery. PRO members receive additional benefits including free shipping.

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TrustScore 4.5 | 7,300+ reviews

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$110.31

Duties & taxes included

In stock

Sold byAmazon USADelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to USA.

Secure transaction

Trustpilot

TrustScore 4.5 | 7,300+ reviews

Neha S.

Excellent communication throughout the order process. Product is perfect.

2 weeks ago

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The MOLLE sheath is of exceptional quality. Very happy with my purchase.

2 weeks ago

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