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Description
dresser coupling Dresser Style 38 Bolted Coupling – WatermainsupplyDescription Dresser Bolted Coupling Style 38 Bolted Coupling Steel Pipe Flexible mechanical coupling for water, wastewater, and industrial piping. Plain end steel pipe in nominal sizes in through 48 in. AWWA C219 compliant. Sizes in 48 in AWWA C219 Compliant NSF 61 & 372 Certified 6 Gasket Compounds Available Stainless Steel Option Fusion Bonded Epoxy Coating Widely separated pipe ends? For applications where a standard body coupling cannot span the
Description
Dresser Bolted Coupling
Style 38 Bolted Coupling
Steel Pipe
Flexible mechanical coupling for water, wastewater, and industrial piping. Plain-end steel pipe in nominal sizes ½ in through 48 in. AWWA C219 compliant.
Sizes ½ in – 48 in
AWWA C219 Compliant
NSF 61 & 372 Certified
6 Gasket Compounds Available
Stainless Steel Option
Fusion-Bonded Epoxy Coating
Widely separated pipe ends? For applications where a standard-body coupling cannot span the gap, the long-body Dresser Style 40 bridges wider pipe separations without spool pieces or additional fittings.
View Style 40 →
Overview
The Dresser Style 38 is a bolted mechanical coupling engineered for flexible, leakproof connections on steel pipe in water, wastewater, and industrial piping systems. No threading, beveling, or precise pipe alignment required — installs with standard wrenches only.
The resilient gasket design absorbs vibration, accommodates thermal pipe movement, and allows angular deflection — enabling curves to be laid using straight pipe lengths without bends or elbows. Compliant with AWWA C219.
Key Advantages
Tool-Only Installation
No threading, beveling, or exact alignment required. Installs with standard wrenches directly in the field.
Absorbs Pipe Movement
Resilient gaskets absorb vibration and accommodate thermal expansion and contraction at the joint.
Angular Deflection
Permits angular deflection — curves can be laid with straight pipe, reducing fittings cost and labor.
½ in to 48 in Standard
One product line covers virtually any plain-end steel pipe application. Larger custom sizes available on request.
Fusion-Bonded Epoxy
Standard coating provides superior corrosion protection in buried, submerged, and aggressive service.
All-Stainless Option
Available in Type 304 or Type 316 stainless steel for highly corrosive service conditions.
6 Gasket Compounds
Compatible with potable water, wastewater, petroleum, chemicals, gases, and high-temperature service.
AWWA C219 + NSF 61/372
Industry-standard certifications for Grade 27 and EPDM gasket configurations.
Materials of Construction
Followers (½ in – 1½ in)
Ductile or Malleable Iron
Small-bore service
Followers (2 in & Larger)
AISI C1012 or ASME SA36 Steel
Single-piece thru 12 in; 2-piece bar for larger
Middle Ring
ASTM A513 / A635 / SA675 Gr.60
Steel sleeve body
Bolts & Nuts
AWWA C111 / ANSI A21.11
E-coated steel standard; Type 316 SS optional
Standard Gasket
Grade 27 Buna-S
See Gasket Options below
Standard Coating
Fusion-Bonded Epoxy
Factory-applied
Gasket Material Options
The Style 38 is supplied with one of six gasket compounds depending on service media, temperature, and chemical compatibility. Select the gasket matching your application from variant options at checkout or contact us for compounds not shown.
Grade 27 Buna-S (Standard)
Styrene-butadiene rubber. General water and wastewater service. NSF 61 and NSF 372 certified for potable water.
Grade 42 Buna-N
Nitrile rubber. Petroleum products, oils, hydrocarbons, and fuel service.
Fluorocarbon (Viton)
For aggressive chemicals and high-temperature fluids where standard rubber compounds would fail.
Butyl
Gases, chlorinated water, and ozone service. Excellent gas permeation resistance.
EPDM
Potable water service. NSF 61 and NSF 372 certified. UV and ozone resistant.
High-Temperature
Service up to 1,200°F where extreme heat exceeds standard rubber compound limits.
Stainless Steel Construction
For highly corrosive service, the Style 38 is available in all-stainless steel construction (Type 316 standard; Type 304 substitutable). Middle ring: Type 316 SS per ASTM A240 with No. 1 mill finish (optional A380 pickle-and-passivation finish). Followers: Type 316 SS only — single-piece thru 12 in, 2-piece bar follower for larger sizes. Bolts: Type 316 with rolled threads. Nuts: Type 316 with Xylan coating. Meets AWWA C219.
SS Working Pressure: 150 PSI · Test Pressure: 250 PSI. Stainless steel couplings are custom-built and made to order with extended lead times — consult factory for project requirements.
Engineering References & Downloads
Pipe OD Reference Chart
Outside-diameter cross-reference for steel, PVC, polyethylene, ductile iron, cast iron, and asbestos cement pipe — sizes ½ in to 60 in. Verify OD before specifying coupling size.
Download Pipe Chart
Style 38 Steel Submittal
Official Dresser submittal for steel pipe construction with full dimensional and pressure specifications. For engineering review and project files.
Download Steel Submittal
Style 38 Stainless Submittal
Official Dresser submittal for Type 304 / Type 316 stainless steel construction. Specifications for corrosive service applications.
Download SS Submittal
Sizes & Specifications — Steel Pipe
| Nom. Size (in) | Pipe OD (in) | Ring Length (in) | Bolts (Qty × Dia × Length) | Working Press (PSI) | Max Test (PSI) | Weight (lbs) |
|---|---|---|---|---|---|---|
| ½ | .840 | 3½ | 2 × ½ in × 6 in | 1500 | 2250 | 2 |
| ¾ | 1.050 | 5 | 2 × ½ in × 7¼ in | 1500 | 2250 | 3 |
| 1 | 1.315 | 5 | 2 × ½ in × 7¼ in | 1500 | 2250 | 4 |
| 1¼ | 1.660 | 5 | 2 × ½ in × 7¼ in | 1500 | 2250 | 4 |
| 1½ | 1.900 | 5 | 2 × ½ in × 7¼ in | 1500 | 2250 | 5 |
| 2 | 2.375 | 5 | 2 × 5/8 in × 8¼ in | 1500 | 2250 | 7 |
| 2½ | 2.875 | 5 | 3 × 5/8 in × 8¼ in | 1500 | 2250 | 13 |
| 3 | 3.500 | 5 | 4 × 5/8 in × 6 in | 1100 | 1650 | 13.5 |
| 4 | 4.500 | 5 | 4 × 5/8 in × 6 in | 1000 | 1500 | 16.5 |
| 5 | 5.563 | 5 | 4 × 5/8 in × 6 in | 1205 | 1808 | 23.5 |
| 6 | 6.625 | 7 | 6 × 5/8 in × 8¼ in | 1029 | 1544 | 31 |
| 8 | 8.625 | 7 | 6 × 5/8 in × 8¼ in | 807 | 1211 | 38 |
| 10 | 10.750 | 7 | 8 × 5/8 in × 8¼ in | 657 | 986 | 49 |
| 12 | 12.750 | 7 | 8 × 5/8 in × 8¼ in | 558 | 837 | 56 |
| 14 | 14.000 | 7 | 8 × 5/8 in × 10-3/4 in | 510 | 765 | 60 |
| 16 | 16.000 | 7 | 10 × 5/8 in × 10-3/4 in | 449 | 673 | 70 |
| 18 | 18.000 | 7 | 10 × 5/8 in × 10-3/4 in | 401 | 602 | 75 |
| 20 | 20.000 | 7 | 12 × 5/8 in × 10-3/4 in | 362 | 543 | 86 |
| 22 | 22.000 | 7 | 14 × 5/8 in × 10-3/4 in | 330 | 495 | 98 |
| 24 | 24.000 | 7 | 14 × 5/8 in × 10-3/4 in | 304 | 456 | 105 |
| 30 | 30.000 | 7 | 16 × 5/8 in × 10-3/4 in | 243 | 364 | 120 |
| 36 | 36.000 | 7 | 18 × 5/8 in × 10-3/4 in | 253 | 379 | 181 |
| 40 | 40.000 | 7 | 18 × 5/8 in × 10-3/4 in | Consult Factory | Consult Factory | 198 |
| 42 | 42.000 | 10 | 20 × 5/8 in × 15 in | 346 | 519 | 351 |
| 48 | 48.000 | 10 | 22 × 5/8 in × 15 in | 304 | 456 | 399 |
Working pressures per Dresser Style 38 Steel Pipe Submittal (2021), calculated per Barlow’s formula at ½ minimum yield. Sizes above 48 in available — consult factory.
Angular Deflection Per Coupling
| Pipe Size Range | 5 in Ring | 7 in Ring | 10 in Ring |
|---|---|---|---|
| ½ in thru 2 in OD | 6° | 6° | — |
| Above 2 in thru 14 in OD | 4° | 4° | 4° |
| Above 14 in thru 30 in OD | 2° | 4° | 4° |
| Above 30 in thru 37 in OD | 1½° | 3° | 3½° |
| Above 37 in thru 42 in OD | — | 2½° | 3½° |
| Above 42 in thru 54 in OD | — | 2° | 3° |
Pipe end must remain past end of gasket by minimum 1 in after deflection.
Applicable Standards
AWWA C219
Bolted Sleeve-Type Couplings
For plain-end pipe
ASTM A513 / A635
Middle Ring Steel
Material specifications
AWWA C111 / ANSI A21.11
Bolt Specifications
Industry-standard fasteners
NSF 61 & NSF 372
Potable Water Certified
Grade 27 and EPDM configurations
⚠ Seal Only — Pipe Joint Must Be Anchored
The Style 38 provides a pressure seal only. When pipe pullout could occur, the pipe joint must be independently anchored or restrained. Failure to anchor the joint could result in escaping line content and cause property damage, serious injury, or death. Confirm restraint requirements before installation.Installation — Step by Step
No special tools required beyond a torque wrench and basic hand tools.
- Pipe End PreparationClean all dirt, rust, oil, and loose scale from pipe end. Inspect gasket seating surface — any gouges or grooves must be corrected before assembly.
- Mark Center PointsMeasure back on each pipe end: ½ the middle ring length plus 2 in. Chalk mark both ends to center the coupling over the joint.
- Position FollowersSlide the follower(s) over the pipe end(s) before assembling any other components.
- LubricateWipe gaskets clean. Lubricate each gasket, pipe OD, and middle ring flares with soapy water or non-petroleum lubricant. Use antifreeze in freezing weather.
- Assemble Middle RingSlide lubricated gaskets over each pipe end, then assemble the middle ring onto one pipe end.
- Join Pipe EndsStab second pipe end into middle ring. Center between chalk marks. Pipe end must extend past end of gasket by minimum 1 in after any angular deflection.
- Install FastenersInstall all bolts and hex nuts. Draw up finger tight before torquing.
- Torque SequenceTighten nuts on opposite sides in a cross-pattern, drawing followers up evenly. Do not fully torque one side before the other.
Torque Specifications
| Bolt Diameter | Required Torque (Ft. Lbs.) |
|---|---|
| 3/8 in & ½ in | 35 |
| 5/8 in | 75 |
| ¾ in | 90 |
Important
For single-gasket products, reduce all torque values by one-half. Stainless steel bolts must be lubricated before installation to prevent thread galling.
Ready to Order?
Confirm pipe OD, gasket grade, and any special requirements before placing your order.
Submittal
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
4.7 ★★★★★
Based on 24 reviews
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Product Reviews
★★★★★ 4
Just as described
Like I needed one more thing on my countertop! But it's coffee, so I'll make it work out. This is first product of it's type that I've used. I've seen it offered in coffee shops and thought that slower drip process must create a nice coffee. So, I've tried and I love it. Just follow the instructions, and get the filters at the same time or pick some up at your grocery store. If you're like me, you'll want to try it out right away.
I enjoy a dark roast and this really improved the flavor of my usual brand of coffee. The only thing that concerns me is the beaker is made of pretty thin glass. I'm wondering if thicker glass would also help to keep the brew hot as I make enough for two cups. Overall, I'm really happy to have found this.
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Reviewed in the United States on November 19, 2023
★★★★★ 5
Durable glass coffee container, nice to use
Previously, we were using an old metal coffee can to store our coffee. The problem is that because it was not transparent, we found ourselves frequently running out of coffee. Out of sight, out of mind.
This glass container lets us see how much coffee we have left, but the fact that the glass bottom didn't appear to be reinforced had concerned me somewhat, particularly because our kitchen counter is hard ceramic tile.
Well, it seems that these glass containers are made of borosilicate glass, which is a special glass made with boron that has superior strength and durability. Apparently, borosilicate glass is made at a higher temperature, and slowly cooled to room temperature in a process called annealing. Annealing involves controlled cooling to relieve internal stresses and improve the strength and durability of the glassware. Still, I wish that the base of the glass container was thicker, like most bottles and jars.
The lid fits on snug and airtight, and there is a button on top that you can push to pump out air and create a vacuum seal. I cannot comment on the worth of this nifty aspect, as the taste of our coffee has not noticeably changed after we began storing our beans in this container.
Still, it is a nice container, it looks nice, appears to function well, and hasn't cracked yet. It even comes with a small sturdy steel coffee scoop. And we get to see our coffee all day long.
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Reviewed in the United States on December 13, 2024
★★★★★ 4
High quality
Bottom line - highly quality vacuum container - would recommend for use with products that are not used daily.
Ordered this for use to store my whole coffee beans. The product appears well crafted and the glass is high quality. After washing and drying the product, I loaded it up with a pound of coffee and this sealed extremely well. It is pretty much impossible to remove the lid without using the release to break the vacuum.
However, after using this for a few days I started to feel like it was a little more work than I wanted to do on a daily basis. It seems to take a while until the button stayed down at the recommend level - I'd rather just push a button once, slid the lid on and release to seal the container than have to push the button 30-40 times to get a vacuum seal.
If you stock up on coffee when there is a good sale, I still wouldn't recommend this for longer term coffee storage, simply because it is a clear container - coffee slowly degrades when exposed to light so it should be an opaque material. I am now using this to store my ground corn (polenta) to ensure it stays fresh and keeps any bugs out that may get into the pantry - after one experience with pantry moths, I don't take chances and now put all my grain in good quality containers. Since I only make polenta about once a month, I don't mind the time/effort it takes to reseal.
Overall, this seems to be a well crafted and high quality product. However, it does seem to be a little on the expensive side for what you get and just didn't work out for me (as originally intended). Fortunately, I did find a good use for it.
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Reviewed in the United States on November 14, 2024
★★★★★ 5
Awesome!
I have tried so many ways of keeping my coffee beans fresh. This cannister is the winner! It is a very high quality container made of Borosilicate Glass which has provided me the protection I need in order to maintain freshness. I am happy, beyond description, with how well this works! The wide mouth allows easy access to the beans until the last is used. And when it is time to clean it, I can easily wipe it out as well as put it in the dishwasher since it is also dish washer safe. I will consider getting a second one for storing other items that I want to keep fresh as well as visible (like cookies, etc).
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Reviewed in the United States on December 27, 2024
★★★★★ 5
For serious coffee connoisseurs
I got this coffee canister because I know that my coffee connoisseur, son will be staying at our home for a few months this spring. He invests in very good quality coffee beans and grinds his portions as needed. I know that this glass vacuum type jar will do the trick in keeping the beans fresh so that the oils don't dry out. My husband and I use a flip top hinged canister for our more regular grind and the speed at which my husband drinks coffee means that it's usually quite fresh without the vacuum additional feature. I would caution that it took a hot minute to figure out how it work and wasn't easy to get open the first time outta the blocks. Read the instructions so you get familiar with home the air is extracted and how to release the pressure to open the canister.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on November 6, 2024
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