What is it's shelf life?

Would assume it last awhile depending on how and where you store it. We buy them in bulk and haven’t had issues with them but keep them stored indoors.

Will this fit sterling water filter

Not sure. I have just used this filter on my whole house filter and wanted to replace filter with same kind have been using. Whole house filter made by A O Smith.

The price is nearly double what you can buy in stores. Why?

i just found it on EBAY. I found filter on Amazon, But they sent me wrong size filter and had to return.

Does this o-ring come with a small tube of grease?

Yes. The o-ring by itself from amazon came with a small packet of very sticky clear grease. I have used vasoline before and it seemed to work just as well.on 1st 4 filters.

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AO-WH-LG-OR - Whole House Water Filter O-Ring 5.48 Inch 14 Cm Diameter Fits Most Housings Made for 4.5 Inch Filters

Product ID: 189163553

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Details

Nominal Inside Diameter
5.48 Inches
Item Diameter
5.48 Inches
Brand
AO Smith
Color
Black
Nominal Outside Diameter
5.48 Inches

💧Water-tight Seal

🔧5.48" Diameter

♻️Genuine Replacement

Description

💧 Keep Your Water Pure, One O-Ring at a Time!

🛠️ EASY MAINTENANCE - Change every 3-6 months to maintain peak performance.
🔒 RELIABLE PERFORMANCE - Ensures a water-tight seal for optimal contaminant removal.
📦 INDIVIDUALLY PACKAGED - Comes securely packaged for your convenience.
🔄 SEAMLESS COMPATIBILITY - Fits most 4.5" filter sumps for hassle-free installation.
✅ GENUINE A O SMITH QUALITY - Trust in authentic parts for long-lasting filtration.

The AO Smith AO-WH-LG-OR is a high-quality 5.48-inch O-Ring designed for whole house water filtration systems. It fits most filter sumps made for 4.5-inch filter elements, ensuring a reliable water-tight seal. This genuine replacement part is essential for maintaining optimal performance and contaminant removal in your water filtration system.

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