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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💧 Seal the deal with Captain O-Ring — your water filter’s best defense!

ROUTINE LEAK PREVENTION - Recommended replacement every 3rd filter change to maintain flawless sealing and avoid costly water damage.
TRIPLE PACK RELIABILITY - Always have a spare—3 O-rings per pack to keep your water filter leak-proof without last-minute runs.
PRECISION FIT GUARANTEED - Designed to perfectly fit a wide range of 3M Aqua-Pure, Watts, AO Smith, and Project Source housings for seamless installation.
CERTIFIED CLEAN WATER SEAL - Crafted from NSF 61 certified Buna-N rubber, ensuring your drinking water stays pure and uncontaminated.
PROUDLY USA MADE WARRANTIED - Assembled in the USA with a 1-year warranty—quality and peace of mind you can trust.

Captain O-Ring’s 3-pack replacement O-rings are precision-engineered seals compatible with major water filter housings including 3M Aqua-Pure, Watts, and AO Smith models. Made from NSF 61 certified Buna-N rubber, these durable gaskets ensure leak-free performance and safe drinking water. Each O-ring measures 3.5 inches inside diameter and 3.75 inches outside diameter, designed for easy installation and routine replacement every third filter change. Proudly assembled in the USA and backed by a 1-year warranty, this pack keeps your filtration system running flawlessly.

Common Questions

Are the products genuine and authentic?+

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.

How long does delivery take and is it reliable?+

Delivery times vary by destination country, typically ranging from 3-9 business days. Each order is fully trackable through our system. We handle all customs clearance and use reliable courier partners for last-mile delivery. You'll receive regular updates about your order status via email and our app.

What is Desertcart? Is it safe to order from?+

Desertcart is an international e-commerce platform operating since 2014. We securely process thousands of orders globally each day. Every product goes through our quality verification process before delivery, and we provide end-to-end order tracking, 24/7 customer support, and a comprehensive returns policy to ensure a safe shopping experience.

How is product pricing calculated?+

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.

2169 DH

Duties & taxes incl.

Moroccostore

Free Returns

30 daysfor PRO membership users

15 dayswithout membership

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Nominal Inside Diameter	3.5 Inches
Item Diameter	3.75 Inches
Brand	Captain O-Ring
Colour	Black
Nominal Outside Diameter	3.75 Inches
UPC	701748961300
Manufacturer	Captain O-Ring LLC
Net Quantity	3.0 count
Number of Pieces	3
Item part number	63597174C
ASIN	B00T56QCCA

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

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