has anyone else found a slimy mold on top of this filter (the center ring) when replacing it for new?

That's the filter doing it's job.

How can i get a o ring for a model ao-wh-prel filter housing ?

I think Amazon has them, Lowes, or AO Smith.

Where are these manufactured? one site stated taiwan, but would like confirmation of that. thanks.

They are made in Taiwan, along with 75 percent of everything sold in the states. I've used these filters for the past few years and it does a very good job.

Great for well water. Get charcoal filter. Great drinking water

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AO Smith AO-WH-PREL-RCP - Carbon Sediment Filter Replacement 4.5 Inch - 5 Micron Filtration

Product ID: 260028253

Details

Brand
A. O. Smith
External testing certification
NSF 42 -
Item weight
454 g
Material
Carbon
Product benefits
Reduces

🏠4.5-inch large capacity for whole house

💧5 micron ultra-fine filtration

🔄6-month easy DIY replacement

฿13219

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Description

💧 Elevate your home’s water game — because every drop counts!

NO PLUMBER NEEDED - Effortless filter swaps every 6 months keep your water fresh without costly service calls.
CRYSTAL CLEAR EVERY TAP - 5 micron filtration removes sediment invisible to the naked eye for pristine water throughout your home.
BUILT FOR BUSY HOUSEHOLDS - Generous 4.5-inch filter size supports families of 4+ with long-lasting performance.
CERTIFIED GENUINE QUALITY - NSF 42 certified carbon filter ensures trusted contaminant reduction and system longevity.
SEAMLESS SYSTEM COMPATIBILITY - Designed exclusively for AO Smith Whole House Filter System with Timer for optimal results.

The AO Smith AO-WH-PREL-RCP is a 4.5-inch carbon sediment replacement filter featuring 5 micron filtration, designed for whole house systems serving 4+ people. Certified to NSF 42 standards, it reduces fine sediment and aesthetic impurities, ensuring cleaner water from every tap. Easy to replace every 6 months without professional help, this genuine AO Smith filter maintains system performance and appliance longevity.

Specifications

ASIN	B07R18MYYD
Brand	A. O. Smith
Brand Name	A. O. Smith
Customer Reviews	4.7 out of 5 stars 759 Reviews
External Testing Certification	NSF 42 - Reduces aesthetic impurities
External testing certification	NSF 42 - Reduces aesthetic impurities
Global Trade Identification Number	04710139023196
Item Weight	1 Pounds
Item weight	1 Pounds
Manufacturer	AO Smith
Manufacturer Part Number	Replacement Cartridge
Material	Carbon
Material Type	Carbon
Model Number	AO-WH-PREL-RCP
Number of Items	1
Product Benefits	Reduces Sediment
Product benefits	Reduces Sediment
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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฿13219

Duties & taxes included

In stock

Sold byAmazon ThailandDelivered 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 Thailand.

Secure transaction

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TrustScore 4.5 | 7,300+ reviews

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