How often do I need to change my filter housing's o-ring?

Captain O-Ring's high quality replacement water filter housing o-rings are designed for reliable extended use. Still, it is typically recommended to replace your o-ring on every third filter change to ensure it is in top shape to prevent leaks.

Can I use grease or lubricant on these o-rings?

You can if you'd like to. Generally a brand new buna-n o-ring can be installed just with wetting it with water. However, these o-rings are compatible with all silicone and petroleum based lubricants, as well as natural oils like vegetable oil.

What if I don't know what o-ring part number my filter housing needs?

Use our handy printable water filter housing o-ring size chart. Print out the chart and lay your old o-ring on the page to see which o-ring it matches with. You can find the size chart listed as "User Guide [PDF]" under "Product guides and documents"

Are these o-rings safe for use in my drinking water?

Yes! These Captain O-Ring replacement o-rings are molded from NSF 61 certified buna-n rubber for safe and clean drinking water.

Where is this o-ring kit assembled?

Proudly assembled in the USA! We hand assemble these kits in Gloucester City, New Jersey.

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Captain O-Ring - Replacement 63597174C / 63597174P / AO-WH-STD-OR-2 / WP252235 Orings for 3M Aqua-Pure, AO Smith, Watts Filter Housings (3 Pack)

Captain O-Ring - Replacement 63597174C / 63597174P / AO-WH-STD-OR-2 / WP252235 Orings for 3M Aqua-Pure, AO Smith, Watts Filter Housings (3 Pack)

Product ID: 15716247

Details

Brand
Captain O-Ring
Color
Black
Item Diameter
3.75 inches
Material
Rubber
Nominal Inside Diameter
3.5 inches

💧NSF 61 certified safe for drinking water

🛠️3-Pack precision-fit O-Rings

🇺🇸Proudly USA assembled

€ 26.55

Duties & taxes included

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Sold byAmazon SlovakiaDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

💧 Seal your water’s purity with confidence — don’t let leaks cramp your flow!

MADE IN THE USA - Hand-assembled in Gloucester City, NJ, ensuring top-tier craftsmanship and reliability.
PERFECT DIMENSIONS - 3.5" inside diameter x 3.75" outside diameter for a flawless, snug fit every time.
LEAK PROOF CONFIDENCE - Replace every 3rd filter change to maintain a perfect seal and avoid costly leaks.
UNIVERSAL COMPATIBILITY - Fits top brands like 3M Aqua-Pure, AO Smith, Watts & Project Source housings effortlessly.
PREMIUM NSF 61 BUNA N RUBBER - Certified safe for clean, healthy drinking water—no compromises on quality.

This 3-pack of replacement O-Rings from Captain O-Ring is engineered for select 3M Aqua-Pure, AO Smith, Watts, and Project Source water filter housings. Molded from NSF 61 certified buna-n rubber, these durable seals ensure leak-free, safe drinking water. With precise 3.5" ID and 3.75" OD dimensions, they fit perfectly and are recommended for replacement every third filter change. Proudly hand-assembled in the USA, these O-Rings combine trusted quality with universal compatibility to keep your filtration system running flawlessly.

Specifications

ASIN	B00T56QCCA
Best Sellers Rank	#149,053 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #53 in Faucet O-Rings
Brand Name	Captain O-Ring
Color	Black
Customer Reviews	4.5 4.5 out of 5 stars (478)
Item Diameter	3.75 inches
Manufacturer	Captain O-Ring LLC
Material Type	Rubber
Nominal Inside Diameter	3.5 inches
Nominal Outside Diameter	3.75 inches
Number of Items	3
Number of Pieces	3
Part Number	63597174C
Set Name	Captain O-Ring Replacement O-Ring Set (3 Pack)
UPC	701748961300
Unit Count	3 Count

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Yes, all products are sourced directly from authorized retailers in the US, UK, UAE and India. We maintain strict quality control processes and verify each product before shipping. All items come with applicable manufacturer warranties and are covered by our standard return policy.

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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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€ 26.55

Duties & taxes included

In stock

Sold byAmazon SlovakiaDelivered 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 Slovakia.

Secure transaction

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TrustScore 4.5 | 7,300+ reviews

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