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.

Fully operational. Shipping worldwide, on schedule.Duty & taxes paid at delivery

Help Track order

Account Cart

Fully operational. Shipping worldwide, on schedule.Duty & taxes paid at delivery

Help Track order

Account Cart

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 durable replacement set

🇺🇸Proudly USA assembled quality

€ 26.80

Duties & taxes included

In stock

Sold byAmazon GreeceDelivered 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 Greece.

Secure transaction

Description

💧 Seal the deal with confidence—never let leaks cramp your flow!

TRIPLE PACK RELIABILITY - Always have a fresh seal ready—replace every 3rd filter change to avoid leaks and downtime.
PRECISION FIT GUARANTEED - Designed for seamless compatibility with top brands like 3M Aqua-Pure, AO Smith, and Watts filter housings.
MADE IN THE USA WITH WARRANTY - Trust in quality craftsmanship and reliable support from Captain O-Ring LLC.
OPTIMAL DIMENSIONS FOR PERFECT SEAL - 3.5" inside diameter x 3.75" outside diameter engineered for flawless performance.
PREMIUM NSF 61 CERTIFIED BUNA N RUBBER - Ensures safe, clean water with a durable, leak-proof seal that stands the test of time.

Captain O-Ring’s 3-pack replacement o-rings are precision-engineered seals compatible with leading water filter housings from 3M Aqua-Pure, AO Smith, and Watts. Molded from NSF 61 certified buna-n rubber, these durable gaskets ensure safe, leak-free water filtration. With exact 3.5" ID and 3.75" OD sizing, they provide a perfect fit and are proudly assembled in the USA by Captain O-Ring LLC, backed by a trusted warranty.

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

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.

Trustpilot

TrustScore 4.5 | 7,300+ reviews

Ayesha M.

The product exactly matches the description. Very satisfied with my purchase.

5 days ago

Vikram D.

The MOLLE sheath is of exceptional quality. Very happy with my purchase.

2 weeks ago

View all Trustpilot reviews

Shop Global, Save with Desertcart

Value for Money

Competitive prices on a vast range of products

Shop Globally

Serving millions of shoppers across more than 100 countries

Enhanced Protection

Trusted payment options loved by worldwide shoppers

Customer Assurance

Trusted payment options loved by worldwide shoppers.

Desertcart App

Shop on the go, anytime, anywhere.

€ 26.80

Duties & taxes included

In stock

Sold byAmazon GreeceDelivered 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 Greece.

Secure transaction

Trustpilot

TrustScore 4.5 | 7,300+ reviews

Abdullah B.

Great price for an authentic product. Fast international shipping too!

3 weeks ago

Fatima A.

Best international shipping I've ever tried. Worth every penny!

3 days ago

View all Trustpilot reviews