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 precision and durability!

VALUE PACK - Three genuine Captain O-Rings in one set to keep your filtration system running smoothly
TRUSTED BRAND - Manufactured by Captain O-Ring LLC, guaranteeing authentic quality and reliability
DURABLE MATERIAL - Premium black rubber resists wear and maintains a tight seal under pressure
PRECISION ENGINEERING - Exact 3.5" inside and 3.75" outside diameter ensures leak-proof performance every time
UNIVERSAL COMPATIBILITY - Seamlessly fits 3M AP and Watts series housings for hassle-free replacements

This 3-pack of genuine Captain O-Ring LLC replacement O-rings is designed for perfect compatibility with multiple 3M Aqua-Pure and Watts water filter housings. Crafted from durable black rubber with precise 3.5" ID and 3.75" OD dimensions, these O-rings ensure a reliable, leak-proof seal to maintain optimal filtration performance.

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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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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.

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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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Manufacturer	Captain O-Ring LLC
Part number	63597174C
Item Weight	9 g
Manufacturer reference	63597174C
Colour	Black
Material	Rubber
Item Package Quantity	3
Number of Pieces	3
Cutting Diameter	3.75 Inches
Batteries included?	No
Batteries Required?	No
Item diameter	3.75 Inches

(3 Pack) 3M Aqua-Pure 63597174C ORing [Genuine Captain O-Ring Part] by Captain O-Ring LLC

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