AQUA CREST

AQUA CREST AP431 Replacement for Aqua-Pure AP430SS Whole House Scale Inhibitor Water Filter Helps Prevent Scale Build Up

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$24.99

About this item

  • 【Protects water appliances】: AQUACREST AP431 scale inhibitor cartridge adopts premium polyphosphates that can effectively prevent limescale and corrosion from building up, therefore, the corrosion and blockage of pipelines can be inhibited. The excellent filter material can protect and extend the service life of your water appliances, like heaters, dishwashers, etc.
  • 【Prevents bursting】: Food-grade BPA-free plastic housing adopts excellent strength with latest advanced technology. Accurate design promises a precise fit without water leakage. AQUACREST AP431 scale inhibitor ensures you a safe water usage experience.
  • 【 Inhibits limescale】: Scale inhibitor provides you with stable and continuous filtered water without an obvious pressure drop. The flow rate is up to 10 gpm so it can meet the water demand for the whole house.
  • 【Long-lasting service life】: It's recommended that you replace the inhibitor every 6 months for effective scale inhibition, which will vary based on water conditions.
  • 【Compatible models】: Replacement for 3M Aqua-Pure AP430, AP430SS and SF18-S Scale Inhibition System. Interchangeable with 3M Aqua-Pure AP431, HF8-S, KleenWater KW431.
$24.99

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Product details

MaterialFood-grade polyphosphates
Product Dimensions2.6"D x 2.57"W x 9.3"H
Item Weight1.1 Pounds
External Testing CertificationRoHS
Product BenefitsPrevent Limescale and Corrosion, Easy of Installation

Technical specifications

materialFood-grade polyphosphates
product_dimensions2.6"D x 2.57"W x 9.3"H
item_weight1.06 pounds
external_testing_certificationRoHS
product_benefitsPrevent Limescale and Corrosion, Easy of Installation
brandAQUA CREST
manufacture_year2022
upc840814135129
unit_count1 Count
compatible_water_purifier_models3M SF18-S
number_of_items1
manufacturerAQUA CREST
item_model_numberAP431
best_sellers_rank#56,048 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #414 in Replacement Under-Sink Water Filters
is_discontinued_by_manufacturerNo
date_first_availableFebruary 14, 2017

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Customer reviews

4.7549 ratings

Customers say

Customers find the water filter works well, particularly with tankless water heaters and dishwashers, and appreciate its perfect fit and easy installation.

★★★★★

Best alternate replacement

RamaSriOctober 12, 2025✓ Verified purchase

Perfect fit as AP431. Works great! Water quality is good. Read more

★★★★★

Dependable service

NancyNovember 3, 2025✓ Verified purchase

Repeat order. Decent price, fast delivery. Read more

★★★★★

Easy install

SusyJuly 23, 2025✓ Verified purchase

Works exactly like it should. Read more

★★★★☆

Fits perfectly.

Adam L. BuchholzFebruary 2, 2026✓ Verified purchase

Good direct replacement. Read more

★★★★★

Useful for tankless water inlet

MikePHandFebruary 17, 2026✓ Verified purchase

I use this on the cold inlet side of my tankless water heater. I haven’t had any issues so far so I have to believe it’s doing the job it’s supposed to. I keep flushing the heater so hopefully that abd using these will keep it running trouble-free for years! Read more

★★★★★

Works

BJFebruary 14, 2026✓ Verified purchase

At the plumber’s recommendation, I replace this filter every year. I’ve never had a problem so it must be good Read more

★★★★★

It's exactly whay I need for my boiler

HelenDecember 16, 2025✓ Verified purchase

I order it every year and it fulfills my expectations. Read more

★★★★★

Filter

ChrisOctober 14, 2025✓ Verified purchase

Way better and cheaper than the stores Read more

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