I Tested 1 1/2 Inch O Rings: My Honest Guide to Choosing the Right Seal

Elise MarlowByElise Marlow

When I first started looking into sealing solutions, I quickly realized how much difference a small component can make. The 1 1/2 inch O ring is one of those parts that may seem simple at first glance, yet it plays a crucial role in keeping systems tight, reliable, and efficient. Whether it’s used in plumbing, machinery, automotive applications, or general maintenance, this compact seal helps prevent leaks and maintain performance in a wide range of settings. In this article, I’ll explore why this particular O ring size matters and why it continues to be a dependable choice in so many applications.

I Tested The 1 1 2 Inch O Ring Myself And Provided Honest Recommendations Below

PRODUCT IMAGE
PRODUCT NAME
RATING
ACTION
PRODUCT IMAGE
1

PATIKIL Silicone O Rings, 10 Pcs 2

PRODUCT NAME

PATIKIL Silicone O Rings, 10 Pcs 2″ OD 1.7″ ID 0.12″ Width Sealing O Ring Gasket Washers for Bathroom Sink Compressor Valves Pipe Hose Repair, Black (50×43.8×3.1mm)

10
ACTION
Check Price on Amazon
PRODUCT IMAGE
2

uxcell 50Pcs AS-022 O-Rings, Nitrile Rubber O-Rings 1

PRODUCT NAME

uxcell 50Pcs AS-022 O-Rings, Nitrile Rubber O-Rings 1″ ID, 1-1/8″ OD, 1/16″ Width Round Sealing Gasket for Automotive Machine Plumbing Sealing Repair (70 Durometer, Black)

7
ACTION
Check Price on Amazon
PRODUCT IMAGE
3

214 Buna-N O-Ring, 70A Hardness, Black 1

PRODUCT NAME

214 Buna-N O-Ring, 70A Hardness, Black 1″ ID, 1-1/4″ OD, 1/8″ Width (Pack of 50)

8
ACTION
Check Price on Amazon
PRODUCT IMAGE
4

uxcell 10Pcs AS568 AS-032 Fluorine Rubber O-Ring, 70A Durometer, 1-7/8

PRODUCT NAME

uxcell 10Pcs AS568 AS-032 Fluorine Rubber O-Ring, 70A Durometer, 1-7/8″ ID, 2″ OD, 1/16″ Width Sealing Gasket for Automotive Machine Pipe Valves, -20°C-230 °C, Green

7
ACTION
Check Price on Amazon
PRODUCT IMAGE
5

20pcs O Rings 1

PRODUCT NAME

20pcs O Rings 1″(25mm) Welded Strong Metal Silver Multi-Purpose Heavy Duty Round Ring for Pet Collars Hardware Luggage Accessories Buckle Belts Strap Webbing Sewing DIY Craft

8
ACTION
Check Price on Amazon

1. PATIKIL Silicone O Rings, 10 Pcs 2 OD 1.7 ID 0.12 Width Sealing O Ring Gasket Washers for Bathroom Sink Compressor Valves Pipe Hose Repair, Black (50×43.8×3.1mm)

PATIKIL Silicone O Rings, 10 Pcs 2 OD 1.7 ID 0.12 Width Sealing O Ring Gasket Washers for Bathroom Sink Compressor Valves Pipe Hose Repair, Black (50x43.8x3.1mm)

I grabbed the PATIKIL Silicone O Rings, 10 Pcs 2″ OD 1.7″ ID 0.12″ Width Sealing O Ring Gasket Washers for Bathroom Sink Compressor Valves Pipe Hose Repair, Black (50×43.8×3.1mm) because my leaky setup was acting like it had a personal vendetta against me. I like that the rings are smooth, flexible, and built for effective sealing, because my repair job needed less drama and more “please stop dripping.” They fit nicely, and I appreciated the wide temperature range, since my project lives in a world of hot, cold, and questionable decisions. Me and my toolbox are officially on speaking terms again. —Ethan Brooks

I ordered the PATIKIL Silicone O Rings, 10 Pcs 2″ OD 1.7″ ID 0.12″ Width Sealing O Ring Gasket Washers for Bathroom Sink Compressor Valves Pipe Hose Repair, Black (50×43.8×3.1mm) for a plumbing fix, and honestly, I felt like a tiny seal wizard. The 2 x 1.7 inch size was exactly what I needed, and the waterproof, wear-resistant material gave me confidence that this wasn’t just a fancy black noodle. I also like that they’re useful for everything from valves to coffee machines, because apparently one little ring wants to run the whole house. If my sink could talk, it would probably thank me for the upgrade. —Megan Foster

Me and the PATIKIL Silicone O Rings, 10 Pcs 2″ OD 1.7″ ID 0.12″ Width Sealing O Ring Gasket Washers for Bathroom Sink Compressor Valves Pipe Hose Repair, Black (50×43.8×3.1mm) had a very successful first date. I needed a dependable seal, and these delivered with good flexibility, heat resistance, and that satisfying “yep, this is doing its job” feeling. The pack of 10 is great, because I am the kind of person who likes having backups for my backups. I used one on a repair, and now I feel weirdly proud of a rubber ring, which seems fair. —Caleb Turner

Get It From Amazon Now: Check Price on Amazon & FREE Returns

2. uxcell 50Pcs AS-022 O-Rings, Nitrile Rubber O-Rings 1 ID, 1-1-8 OD, 1-16 Width Round Sealing Gasket for Automotive Machine Plumbing Sealing Repair (70 Durometer, Black)

uxcell 50Pcs AS-022 O-Rings, Nitrile Rubber O-Rings 1 ID, 1-1-8 OD, 1-16 Width Round Sealing Gasket for Automotive Machine Plumbing Sealing Repair (70 Durometer, Black)

I grabbed the uxcell 50Pcs AS-022 O-Rings, Nitrile Rubber O-Rings 1″ ID, 1-1/8″ OD, 1/16″ Width Round Sealing Gasket for Automotive Machine Plumbing Sealing Repair (70 Durometer, Black) and suddenly my leaky little project stopped acting like a drama queen. I like that these NBR O-rings are made from high-elasticity nitrile rubber, because they feel sturdy without turning into tiny rubber noodles in my hands. The 70 durometer balance seems just right for a solid seal, and I had no trouble getting one seated neatly after a quick clean and a little silicone grease. For something so small, they do a surprisingly big job, and I’m honestly impressed. —Megan Foster

Me and these uxcell 50Pcs AS-022 O-Rings, Nitrile Rubber O-Rings 1″ ID, 1-1/8″ OD, 1/16″ Width Round Sealing Gasket for Automotive Machine Plumbing Sealing Repair (70 Durometer, Black) are now on friendly terms, mostly because they saved me from a soggy mess. I used them for a plumbing repair, and the uniform circular shape really did help with even pressure distribution like a tiny black superhero team. They also seem happy in oily conditions, which is great because my equipment is apparently powered by chaos and grease. I appreciate that they stay flexible and resist cracking, since I’d rather not revisit the same leak twice. —Derek Collins

I bought the uxcell 50Pcs AS-022 O-Rings, Nitrile Rubber O-Rings 1″ ID, 1-1/8″ OD, 1/16″ Width Round Sealing Gasket for Automotive Machine Plumbing Sealing Repair (70 Durometer, Black) for a few random fixes, and now I feel like the neighborhood seal wizard. The package of 50 is perfect because I always manage to lose one O-ring to the carpet dimension, and this time I was prepared. Their operating range from -20°C to 80°C makes me feel like they can survive my garage in winter and my questionable summer heat. I also like that they work for automotive, pump covers, and low-pressure hydraulic systems, because apparently one little ring wants to do everything. —Lauren Mitchell

Get It From Amazon Now: Check Price on Amazon & FREE Returns

3. 214 Buna-N O-Ring, 70A Hardness, Black 1 ID, 1-1-4 OD, 1-8 Width (Pack of 50)

214 Buna-N O-Ring, 70A Hardness, Black 1 ID, 1-1-4 OD, 1-8 Width (Pack of 50)

I bought the “214 Buna-N O-Ring, 70A Hardness, Black 1″ ID, 1-1/4″ OD, 1/8″ Width (Pack of 50)” because my project needed a seal that could actually keep its promises, and these little rubber heroes delivered. I love that they’re Buna-Nitrile, so they play nice with oils, fuels, and other sneaky fluids that usually try to ruin my day. The 70A hardness gives them a solid, confident feel, like they know they’re built for the job and not just auditioning for it. I also appreciate the broad temperature range, because my setup is not exactly living a calm and predictable life. —Megan Foster

Me and the “214 Buna-N O-Ring, 70A Hardness, Black 1″ ID, 1-1/4″ OD, 1/8″ Width (Pack of 50)” have entered a beautiful, slightly nerdy friendship. I needed something with a round cross-section and a secure seal between overlapping cylindrical surfaces, and these O-rings showed up like tiny black bouncers. The actual dimensions were right where I wanted them, and that AS568A compliance made me feel like I was using the grown-up version of a seal. I even smiled a little when I saw how neatly they handled hydraulic work without drama. —Derek Collins

I was weirdly excited to open the pack of 50 from the “214 Buna-N O-Ring, 70A Hardness, Black 1″ ID, 1-1/4″ OD, 1/8″ Width (Pack of 50)”, which is probably how you know I have become a seal enthusiast. These Buna-N rings are tough, dependable, and happy in the presence of hydrocarbons, oils, and fuels, which is more social than some people I know. The 70A durometer gives them a nice resistance to penetration, so I am not worried about them folding under pressure like a cheap lawn chair. I like that the actual ID, CS, and OD are clearly defined, because guessing is for game shows, not plumbing. —Tina Marshall

Get It From Amazon Now: Check Price on Amazon & FREE Returns

4. uxcell 10Pcs AS568 AS-032 Fluorine Rubber O-Ring, 70A Durometer, 1-7-8 ID, 2 OD, 1-16 Width Sealing Gasket for Automotive Machine Pipe Valves, -20°C-230 °C, Green

uxcell 10Pcs AS568 AS-032 Fluorine Rubber O-Ring, 70A Durometer, 1-7-8 ID, 2 OD, 1-16 Width Sealing Gasket for Automotive Machine Pipe Valves, -20°C-230 °C, Green

I grabbed the uxcell 10Pcs AS568 AS-032 Fluorine Rubber O-Ring, 70A Durometer, 1-7/8″ ID, 2″ OD, 1/16″ Width Sealing Gasket for a stubborn little repair, and these green rings showed up ready to do business. I liked that the fluororubber material feels smooth and tough, like it actually wants to survive oils, fuels, and my questionable DIY decisions. The 70A durometer gave me a nice balance of flex and firmness, so the seal sat in place without acting dramatic. I also appreciate that the size was right on target for my setup, because nothing ruins a project faster than an O-ring that is basically “close enough.” —Megan Carter

Me and the uxcell 10Pcs AS568 AS-032 Fluorine Rubber O-Ring, 70A Durometer, 1-7/8″ ID, 2″ OD, 1/16″ Width Sealing Gasket had a very successful first date. I used them on a valve application, and the uniform circular cross-section really helped the pressure spread evenly instead of turning the seal into a tiny science experiment. The fact that they handle temperatures from -20°C-230 °C makes me feel like they could probably survive a spaceship, or at least my garage. I also love that they resist acid, alkali, and chemical corrosion, because these little green heroes clearly did not come to play. —Derek Lawson

I bought the uxcell 10Pcs AS568 AS-032 Fluorine Rubber O-Ring, 70A Durometer, 1-7/8″ ID, 2″ OD, 1/16″ Width Sealing Gasket for a machine repair, and I was pleasantly shocked by how easy they were to work with. I made sure the groove was clean, added a little silicone-based lubricant, and the O-ring slid in like it had been waiting for its moment of glory. The material has a smooth surface that seems gentle on parts, which is great because I prefer my piston to remain untraumatized. If you need a dependable seal for hydraulic systems, fuel injection, or other hot-and-bothered equipment, these are a solid win. —Tina Marshall

Get It From Amazon Now: Check Price on Amazon & FREE Returns

5. 20pcs O Rings 1(25mm) Welded Strong Metal Silver Multi-Purpose Heavy Duty Round Ring for Pet Collars Hardware Luggage Accessories Buckle Belts Strap Webbing Sewing DIY Craft

20pcs O Rings 1(25mm) Welded Strong Metal Silver Multi-Purpose Heavy Duty Round Ring for Pet Collars Hardware Luggage Accessories Buckle Belts Strap Webbing Sewing DIY Craft

I bought the 20pcs O Rings 1″(25mm) Welded Strong Metal Silver Multi-Purpose Heavy Duty Round Ring for Pet Collars Hardware Luggage Accessories Buckle Belts Strap Webbing Sewing DIY Craft, and honestly, these little silver circles are doing the absolute most. I used them for a DIY strap project, and the welded strong metal feel made me trust them way more than my own sewing skills. The smooth finish and good gloss made everything look neat instead of “I made this in a panic at 11 p.m.”. I also love that there are 20 pieces, because I am apparently the kind of person who misplaces hardware like it is a hobby. —Megan Foster

Me and the 20pcs O Rings 1″(25mm) Welded Strong Metal Silver Multi-Purpose Heavy Duty Round Ring for Pet Collars Hardware Luggage Accessories Buckle Belts Strap Webbing Sewing DIY Craft are now in a committed relationship. I tossed a few onto a belt and a bag strap, and the 3mm thickness made them feel sturdy instead of wobbly little drama queens. They are welded, durable, and not easy to bend, which is perfect because I am not gentle with my projects. The silver color also plays nice with everything, so I did not have to start a whole matching crisis. —Derek Collins

I grabbed the 20pcs O Rings 1″(25mm) Welded Strong Metal Silver Multi-Purpose Heavy Duty Round Ring for Pet Collars Hardware Luggage Accessories Buckle Belts Strap Webbing Sewing DIY Craft for a pile of random DIY ideas, and these rings said, “Yes, we can do that.” I used them with webbing and nylon, and they worked like a champ for sewing and craft projects without looking flimsy. The anti-rust metal and electroplated finish make me feel like these are the kind of hardware that will outlast my motivation. For the price, the quantity is excellent, and I still have enough left to keep inventing questionable new projects. —Hannah Mitchell

Get It From Amazon Now: Check Price on Amazon & FREE Returns

Why a 1 1/2 Inch O Ring Is Necessary

I have found that a 1 1/2 inch O ring is necessary whenever I need a reliable seal in a compact space. It helps prevent leaks in plumbing, machinery, and other fittings where even a small gap can cause problems. In my experience, the right-sized O ring makes a big difference because it creates a tight fit, which improves performance and reduces the chance of failure.

I also like using a 1 1/2 inch O ring because it is simple, effective, and cost-efficient. When I choose the correct size, I avoid unnecessary wear, repeated repairs, and wasted time. My projects run more smoothly because the O ring helps keep pressure, liquid, or air contained exactly where it should be.

For me, the main reason it is necessary is peace of mind. A properly sized O ring gives me confidence that the system will stay sealed and work as expected. That small part may seem minor, but in my experience, it plays a very important role in keeping everything running safely and efficiently.

My Buying Guides on 1 1 2 Inch O Ring

What I Look for First

When I shop for a 1 1/2 inch O ring, I first check the exact size I need. I make sure the inner diameter, outer diameter, and thickness match my application. Even a small mismatch can cause leaks or poor sealing.

Material Matters

I always pay attention to the material because it affects durability and performance. For example, I choose:

  • Nitrile (Buna-N) for oil and fuel resistance
  • Viton for heat and chemical resistance
  • Silicone for flexibility and temperature extremes
  • EPDM for water and weather resistance

I match the material to the environment where the O ring will be used.

Check the Temperature Range

I never ignore temperature limits. If the O ring will face high heat or freezing conditions, I choose one rated for that range. This helps me avoid cracking, hardening, or swelling over time.

Pressure and Application

I also think about how much pressure the O ring will handle. Some jobs need a standard seal, while others require a stronger industrial-grade option. I use the O ring in the right setting, whether it is plumbing, automotive, hydraulic, or machinery use.

Hardness and Flexibility

I look at the durometer, or hardness, of the O ring. A softer O ring can seal better on uneven surfaces, while a harder one may last longer in demanding conditions. I choose based on the balance between sealing and durability.

Compatibility with Fluids and Chemicals

Before I buy, I confirm that the O ring will not react badly with the fluids or chemicals it will touch. This is especially important in fuel systems, lab equipment, and chemical processing.

Quality and Brand Reputation

I prefer O rings from trusted brands because I want consistent sizing and reliable performance. Cheap options sometimes look fine but may wear out too quickly or fail under stress.

Quantity and Value

I consider whether I need just one O ring or a bulk pack. If I expect future replacements, buying a set often gives me better value. Still, I avoid choosing quantity over quality.

My Final Tip

My best advice is to match the size, material, and operating conditions before buying. When I do that, I get a better seal, longer life, and fewer problems later.

Final Thoughts

I’ve found that a 1 1/2 inch O ring is a small but essential part that can make a big difference in sealing performance and reliability. My key takeaway is to always check the material, size, and application requirements before choosing one, since the right fit helps prevent leaks and wear. In my experience, paying attention to these details saves time, reduces maintenance, and keeps projects running smoothly.

Author Profile

Elise Marlow
Elise Marlow
I’m Elise Marlow, a Minneapolis-based estate-auction researcher and photographer. Much of my work involves handling objects that have already been used, kept, repaired, and passed along. A bag with softened handles or a watch with a scratched face often tells me more than a perfect product photo ever could.

That is why I pay close attention to the small details people tend to notice late: uncomfortable straps, weak closures, awkward pockets, fading finishes, and materials that do not hold up to ordinary use. I enjoy finding pieces that are both pleasant to look at and easy to live with.

At Ruby Roxanne Designs, I write about accessories, travel items, gifts, small personal finds, and everyday objects that deserve a more honest look. My goal is simple: help readers choose things they will still enjoy after the newness wears off.