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Description
dresser coupling Dresser Style 138 Coupling | Cast/Ductile Iron 3 in - (3.74 - 4.02) / .188X5Description Dresser Bolted Coupling Style 138 Coupling Cast & Ductile Iron Pipe Wide range bolted sleeve coupling for plain end cast iron and ductile iron pipe. One nominal size covers the full OD spread from legacy cast iron through modern DIP. Sizes 3 in 12 in 250 PSI Working Pressure Fusion Bonded Epoxy ID OD NSF 61 & 372 Certified AWWA C111 Bolting Overview The Dresser Style 138 is a wide range bolted sleeve coupling for joining plain end cast
Description
Dresser Bolted Coupling
Style 138 Coupling
Cast & Ductile Iron Pipe
Wide-range bolted sleeve coupling for plain-end cast iron and ductile iron pipe. One nominal size covers the full OD spread from legacy cast iron through modern DIP.
Sizes 3 in – 12 in
250 PSI Working Pressure
Fusion-Bonded Epoxy ID/OD
NSF 61 & 372 Certified
AWWA C111 Bolting
Overview
The Dresser Style 138 is a wide-range bolted sleeve coupling for joining plain-end cast iron (CIP) and ductile iron pipe (DIP) in nominal sizes 3 in through 12 in. Its key advantage is a single coupling per nominal size that covers the full OD range — whether the line in the ground is legacy cast iron or current-production ductile iron, one part number fits the joint.
Style 138 couplings provide flexible, leakproof connections that absorb vibration, accommodate pipe movement, and require no threading, beveling, or precise pipe alignment. Installation is wrench-only.
Key Features
Wide OD Coverage
One coupling per nominal size fits the full OD spread of cast iron and ductile iron pipe — from older CIP to current DIP production.
CIP & DIP Application
Engineered specifically for plain-end cast and ductile iron pipe in waterworks and utility service.
Tool-Only Installation
No threading, beveling, or pipe alignment required. A wrench is all that’s needed for a leakproof joint.
Flexible Joint
Absorbs vibration and accommodates minor angular deflection and pipe movement at the joint.
Materials of Construction
Followers
AISI C1012 or ASME SA36
Steel followers indicated by part number suffix
Middle Ring
ASTM A513 / A635 / SA675 Gr.60
Steel sleeve body
Bolts & Nuts
AWWA C111 / ANSI A21.11
Black E-coated steel as standard
Gasket
Grade 27 BUNA-S
Standard supply
Standard Coating
Fusion-Bonded Epoxy ID/OD
Factory-applied
Optional Coating
Dresser RED-D Shopcoat
Available on request
Sizes & Working Pressure
| Nominal Size | Outside Diameter Range (in) | Working Pressure (PSI) |
|---|---|---|
| 3 in | 3.74 – 4.02 | 250 |
| 4 in | 4.74 – 5.06 | 250 |
| 6 in | 6.84 – 7.16 | 250 |
| 8 in | 8.99 – 9.36 | 250 |
| 10 in | 11.04 – 11.46 | 250 |
| 12 in | 13.14 – 13.56 | 250 |
Consult Inside Sales For
Standard supply is Grade 27 BUNA-S gasket with fusion-bonded epoxy ID/OD coating. Contact our team for products requiring American Iron & Steel (AIS) certification, alternate gasket materials, or alternate coatings.
Ready to Order?
Confirm pipe OD and any special requirements before placing your order.
Submittal
Style 38/138/40 CIP/DIP Submittal
Catalog
Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
- Except Preorder products are shipped in 48 hours.
- Delivery to the USA:
- Standard Shipping : 3-10 business days
- If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
- To process your return/exchange, please contact us at [email protected]
- Please click here for more details>>> Return & Exchange Policy
4.4 ★★★★★
Based on 1042 reviews
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Product Reviews
★★★★★ 5
Very classy looking! Perfect height and length for TKL keyboards!
This wrist rest is the perfect height and length for my TKL keyboards! The wood is soft and smooth. It looks VERY classy compared to some of the wrist rests I've used in the past. The non-slip pads work great too.
The only thing I could find that was wrong is that the logo is upside down. It's not visible though because it's the edge that meets the keyboard so it's never seen. I find it endearing actually! Everything else is perfect, so I'd definitely recommend!
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Reviewed in the United States on September 23, 2025
★★★★★ 3
Classy look, but finish issue
This walnut wrist rest looks great on the desk—simple, solid, and much nicer than foam or gel options. It has a clean, polished style that pairs well with a keyboard, and the non-slip base keeps it from sliding around.
I wasn’t sure how I would like it compared to the soft cushy pad I used before, but it’s actually been pretty comfortable. The firmness gives steady support, and I haven’t found it too uncomfortable even after longer typing sessions.
The one drawback is a spot where the finish has worn or dissolved. It wasn’t there when I first got it, so I suspect the coating isn’t as durable as I’d hoped. It doesn’t affect how it feels in use, but it does stand out on an otherwise sharp-looking piece.
Overall, it’s a nice upgrade if you want a wooden wrist rest, just be aware the finish might not stay flawless over time.
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Reviewed in the United States on September 11, 2025
★★★★★ 5
Classy, Comfortable, and Built to Last!
I’ve never tried a wooden wrist rest before, but after going through a few padded ones (even some expensive name-brand versions) that eventually peeled or fell apart, I figured this was worth a shot. And I’m so glad I did!
This walnut wrist rest is smooth, beautifully made, and looks amazing on my desk. I have a whitewashed office setup, but this piece looks so good that I half-joked about wanting to change my desk to match it! It adds a very clean, grown-up aesthetic to the space.
One thing I really appreciated is that it comes in several sizes to suit different setups. I ordered the largest available, and while it’s just a couple inches shy of covering the full length of my keyboard, it still works perfectly. It has non-slip grips on the bottom that keep it in place, and even though it’s made of solid wood, it’s surprisingly comfortable and ergonomic to type with.
It’s also super low-maintenance—just wipe it clean with a damp cloth. For the $26–$29 price range, I think it’s a fantastic value and honestly better than some of the big-name options I’ve tried. This is a quality piece I expect to hold up for a long time, and I’m really happy with it!!
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Reviewed in the United States on July 23, 2025
★★★★★ 5
Check the height of your keyboard before ordering
This is a beautifully made, elegant looking wrist rest. The finish is satin perfectly smooth to the touch. As keyboards vary in height, be sure to measure he height of the front edge of yours before ordering—I didn’t (which is entirely my fault) and found that this wrist rest is just a wee bit too tall, which positioned my wrists a tad higher than I’m used to. Another factor you may want to consider are the ergonomics of solid wood versus other materials and your personal preferences (e.g., I tend to prefer cloth covered gel, because he cloth keeps my wrists from sticking and the gel is cushioning). My closing thought: this wrist rest is that it is by far the best looking of any wrist rest I’ve ever seen.
[Disclosure: I received this product for “free”—in quotes because the IRS considers the item’s retail value as taxable income for federal income tax purposes. This review is my personally written—not AI generated—honest opinion, and is uncensored by the seller.]
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Reviewed in the United States on July 29, 2025
★★★★★ 5
Great Tray For Storing My Everyday Carries
Size: 8.5" x 5.8" x 1.9", Color: Black
My everyday carry items (wallet, keys, etc.), used to just get thrown around wherever when I'd get home, but this little tray makes a great, defined, space for me to keep those things when I don't need them on me. The soft lining reduces the obnoxious sound of throwing keys on a hard surface, and of course keeps me from scratching up a surface. The build feels quality and I haven't seen any damage to it yet. Also the all black version with gold buckle looks quite good and adds a subtle touch of luxury. Absolute recommend for the price.
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Reviewed in the United States on April 15, 2026