About Duct Connections
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How to Identify and Measure Fittings
Pipe size is an industry designation, not the actual size. View information about how to measure threaded and unthreaded pipe and pipe fittings.
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Cleanout Plugs
![](/prerenderstable/mvPRE/contents/gfx/imagecache/240/2400k52-@halfx_637184908716376355.png?ver=imagenotfound)
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Close off your drain cleanout pipe with these threaded plugs. Note: If you do not know your pipe size, measure the OD of your existing cleanout plug or the ID of your cleanout fitting and match to the value listed.
Brass | Black ABS Plastic | |||||||
---|---|---|---|---|---|---|---|---|
Recessed | Raised | Recessed | ||||||
Cleanout Plug OD/Fitting ID | For Pipe Size | Thread Type | Each | Each | Each | |||
1 7/8" | 1 1/2 | NPT | 0000000 | 000000 | 0000000 | 000000 | 0000000 | 00000 |
2 3/8" | 2 | NPT | 0000000 | 00000 | 0000000 | 00000 | 0000000 | 0000 |
2 27/32" | 2 1/2 | NPT | 000000 | 00 | 0000000 | 00000 | 0000000 | 0000 |
3 15/32" | 3 | NPT | 0000000 | 00000 | 0000000 | 00000 | 0000000 | 0000 |
3 31/32" | 3 1/2 | NPT | 0000000 | 00000 | 0000000 | 00000 | 0000000 | 0000 |
4 15/32" | 4 | NPT | 0000000 | 00000 | 0000000 | 00000 | 0000000 | 00000 |
4 31/32" | __ | NPT | 0000000 | 00000 | 0000000 | 00000 | 0000000 | 0000 |
5 17/32" | 5 | NPT | 0000000 | 00000 | 0000000 | 00000 | 000000 | 00 |
6" | __ | NPT | 0000000 | 00000 | 0000000 | 00000 | 000000 | 00 |
6 19/32" | 6 | NPT | 0000000 | 000000 | 0000000 | 000000 | 000000 | 00 |
6 19/32" | 6 | UNC | 000000 | 00 | 000000 | 00 | 0000000 | 00000 |
Driver for Recessed Plugs | 000000 | Each | 000000 |
Drain Cleanout Hole Covers
![](/prerenderstable/mvPRE/contents/gfx/imagecache/204/2043k23p1-g01d-digital@halfx_637061158966522477.png?ver=imagenotfound)
![](/prerenderstable/mvPRE/contents/gfx/imagecache/204/2043k42p2-g01f-digital@halfx_637061158630263845.png?ver=imagenotfound)
Allow easy access to cleanout plugs hidden behind walls and floors.
Covers come with a screw to hold the cover in place.
For technical drawings and 3-D models, click on a part number.
Dia. | Thick. | Material | Mounting Fasteners Included | Cap., lbs. | Bolt Lg. | Screw Lg. | Each | |
Wall | ||||||||
---|---|---|---|---|---|---|---|---|
3" | 1/32" | 430 Stainless Steel | Yes | __ | __ | 2 1/4" | 0000000 | 00000 |
4" | 1/32" | 430 Stainless Steel | Yes | __ | __ | 2 1/4" | 0000000 | 0000 |
5" | 1/32" | 430 Stainless Steel | Yes | __ | __ | 2 1/4" | 0000000 | 00000 |
6" | 1/32" | 430 Stainless Steel | Yes | __ | __ | 2 1/4" | 0000000 | 00000 |
8" | 1/32" | 430 Stainless Steel | Yes | __ | __ | 2 1/4" | 0000000 | 00000 |
Floor | ||||||||
5 1/8" | 3/16" | Nickel Alloy | Yes | 2,400 | 1 1/2" | __ | 0000000 | 00000 |
6 1/8" | 1/4" | Nickel Alloy | Yes | 2,400 | 1 1/2" | __ | 0000000 | 000000 |
8 3/8" | 1/4" | Nickel Alloy | Yes | 2,400 | 1 1/2" | __ | 0000000 | 000000 |
Aboveground Standard-Wall PVC Pipe Fittings for Drain, Waste, and Vent
![](/prerenderstable/mvPRE/contents/gfx/imagecache/488/4880k72-4880k772-48925k92c1-c01d-digital-master1580994068-p9@halfx_637165701997768615.png?ver=imagenotfound)
- For Use With: Water
- Max. Temperature: 140° F
- Specifications Met: ASTM D1784, ASTM D2665
- Pipe Nipples and Pipe: Use Schedule 40 PVC Plastic
- Flanges: Use Schedule 40 PVC Plastic
These Schedule 40 fittings are the industry standard for gravity-flow drain, waste, and vent (DWV) applications. Fittings are PVC, which has good corrosion resistance. They meet ASTM D1784 and ASTM D2665 specifications and testing requirements for material quality.
Attach socket-connect ends to unthreaded pipe or another socket-connect fitting with a PVC primer and cement (also known as solvent weld).
Warning: Never use plastic pipe fittings and pipe with compressed air or gas.
For technical drawings and 3-D models, click on a part number.
![](/prerenderstable/mvPRE/contents/gfx/imagecache/238/2389k77-@halfx_637690240962133378.png?ver=imagenotfound)
To prevent leaks in threaded connections, apply a non-hardening, plastic-compatible sealant. Tape or sealants with PTFE are not recommended for plastic-to-plastic threaded connections. When making a threaded connection be careful not to overtighten the threads. To prevent cracks and leaks, finger tighten the fitting, then wrench-tighten one to two turns.
Underground PVC Pipe Fittings for Drain, Waste, and Vent
With thinner walls than Schedule 40 fittings, these are lighter in weight and have more space on the inside for high-flow applications, such as underground gravity-flow sewer and storm drainage lines. They are also known as SDR 35 fittings. Made of PVC, they have good strength and corrosion resistance. All meet an ASTM specification and testing requirement for material quality, dimensions, and workmanship. Threaded connections can be taken apart as needed for maintenance and repair.
Warning: Never use plastic pipe fittings and pipe with compressed air or gas.
For technical drawings and 3-D models, click on a part number.
![](/prerenderstable/mvPRE/contents/gfx/imagecache/910/9102k333p1-c01d-digital@halfx_637109087638948567.png?ver=imagenotfound)
To prevent leaks in threaded connections, apply a non-hardening, plastic-compatible sealant. Tape or sealants with PTFE are not recommended for plastic-to-plastic threaded connections. When making a threaded connection be careful not to overtighten the threads. To prevent cracks and leaks, finger tighten the fitting, then wrench-tighten one to two turns.
Quick-Open Duct Access Panels
![](/prerenderstable/mvPRE/contents/gfx/imagecache/181/1815k66multinegative_right_positive_front_standard15_1631805124_985@halfx_637673840732587156.png?ver=imagenotfound)
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The panels open and close by turning the knobs. Also known as cleanouts, panels cover cutouts in duct to provide access for inspection and cleaning. They’re made of galvanized steel for good corrosion resistance. All have a gasket to create a tight seal. Use the included template to make the cutout.
Style D panels have an observation view port that lets you quickly see if dust or debris is blocking the airflow in your duct without having to open the panel.
For technical drawings and 3-D models, click on a part number.
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For Duct | For Cutout | Opening | Temp. Range, °F | ||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Ht. | Wd. | Ht. | Wd. | Ht. | Wd. | Gauge | Min. | Max. | Features | Mount Type | Each | ||
Galvanized Steel Panel and Black-Coated Steel Frame | |||||||||||||
A | 10" | 14" | 6" | 10" | __ | __ | 22 | Not Rated | 2300° | __ | Clamp On | 00000000 | 0000000 |
A | 12" | 16" | 8" | 12" | __ | __ | 22 | Not Rated | 2300° | __ | Clamp On | 00000000 | 000000 |
Galvanized Steel Panel and Frame | |||||||||||||
A | 10" | 14" | 6" | 10" | __ | __ | 22 | -20° | 200° | Insulated Backing | Clamp On | 0000000 | 00000 |
A | 12" | 16" | 8" | 12" | __ | __ | 22 | -20° | 200° | Insulated Backing | Clamp On | 0000000 | 00000 |
A | 18" | 22" | 14" | 18" | __ | __ | 20 | -20° | 200° | Insulated Backing | Clamp On | 0000000 | 000000 |
B | 8" | 12" | 4" | 8" | __ | __ | 22 | -20° | 200° | Insulated Backing | Clamp On | 00000000 | 00000 |
C | 16" | 20" | 12" | 16" | __ | __ | 20 | -20° | 200° | Insulated Backing | Clamp On | 00000000 | 000000 |
C | 22" | 28" | 18" | 24" | __ | __ | 18 | -20° | 200° | Insulated Backing | Clamp On | 0000000 | 000000 |
D | 10" | 14" | 6" | 10" | 2 5/8" | 4" | 22 | -20° | 200° | Observation View Port | Clamp On | 00000000 | 00000 |
D | 16" | 20" | 12" | 16" | 8" | 8" | 22 | -20° | 200° | Insulated Backing, Observation View Port | Clamp On | 00000000 | 000000 |
![](/prerenderstable/mvPRE/contents/gfx/imagecache/525/5252k5multipositive_right_negative_front_standard15_1631805125_776@halfx_637673840737790688.png?ver=imagenotfound)
For Cutout | Temp. Range, °F | |||||||||
---|---|---|---|---|---|---|---|---|---|---|
For Duct Trade Size | Ht. | Wd. | Gauge | Min. | Max. | Features | Mount Type | Each | ||
Galvanized Steel Panel and Frame | ||||||||||
E | 5-6 | 4" | 8" | 22 | -20° | 200° | Insulated Backing | Clamp On | 00000000 | 000000 |
E | 6-7 | 6" | 10" | 22 | -20° | 200° | Insulated Backing | Clamp On | 000000 | 00000 |
E | 7-9 | 4" | 8" | 22 | -20° | 200° | Insulated Backing | Clamp On | 00000000 | 00000 |
E | 8-9 | 6" | 10" | 22 | -20° | 200° | Insulated Backing | Clamp On | 000000 | 00000 |
E | 10-11 | 4" | 8" | 22 | -20° | 200° | Insulated Backing | Clamp On | 00000000 | 00000 |
E | 10-11 | 8" | 12" | 22 | -20° | 200° | Insulated Backing | Clamp On | 00000000 | 000000 |
E | 10-12 | 6" | 10" | 22 | -20° | 200° | Insulated Backing | Clamp On | 000000 | 00000 |
E | 12-14 | 4" | 8" | 22 | -20° | 200° | Insulated Backing | Clamp On | 00000000 | 00000 |
E | 12-14 | 8" | 12" | 22 | -20° | 200° | Insulated Backing | Clamp On | 0000000 | 000000 |
E | 13-14 | 6" | 10" | 22 | -20° | 200° | Insulated Backing | Clamp On | 000000 | 00000 |
E | 15-16 | 6" | 10" | 22 | -20° | 200° | Insulated Backing | Clamp On | 000000 | 00000 |
E | 15-16 | 8" | 12" | 22 | -20° | 200° | Insulated Backing | Clamp On | 00000000 | 000000 |
E | 15-16 | 12" | 16" | 20 | -20° | 200° | Insulated Backing | Clamp On | 00000000 | 000000 |
E | 17-18 | 8" | 12" | 22 | -20° | 200° | Insulated Backing | Clamp On | 00000000 | 000000 |
E | 17-18 | 12" | 16" | 20 | -20° | 200° | Insulated Backing | Clamp On | 00000000 | 000000 |
E | 17-20 | 6" | 10" | 22 | -20° | 200° | Insulated Backing | Clamp On | 000000 | 00000 |
E | 19-20 | 8" | 12" | 22 | -20° | 200° | Insulated Backing | Clamp On | 00000000 | 000000 |
E | 19-20 | 12" | 16" | 20 | -20° | 200° | Insulated Backing | Clamp On | 00000000 | 000000 |
E | 21-22 | 12" | 16" | 20 | -20° | 200° | Insulated Backing | Clamp On | 00000000 | 000000 |
E | 21-24 | 6" | 10" | 22 | -20° | 200° | Insulated Backing | Clamp On | 000000 | 00000 |
E | 23-24 | 12" | 16" | 20 | -20° | 200° | Insulated Backing | Clamp On | 00000000 | 000000 |
E | 25-28 | 6" | 10" | 22 | -20° | 200° | Insulated Backing | Clamp On | 000000 | 00000 |
E | 25-28 | 12" | 16" | 20 | -20° | 200° | Insulated Backing | Clamp On | 00000000 | 000000 |
E | 29-32 | 12" | 16" | 20 | -20° | 200° | Insulated Backing | Clamp On | 0000000 | 000000 |
E | 29-32 | 18" | 24" | 18 | -20° | 200° | Insulated Backing | Clamp On | 00000000 | 000000 |
E | 33-36 | 12" | 16" | 20 | -20° | 200° | Insulated Backing | Clamp On | 00000000 | 000000 |
Duct Access Panels
![](https://www.mcmaster.com/prerenderstable/mvPRE/contents/gfx/small/3978k42p1-h01a-digitals.png?ver=1433944148)
Also known as cleanouts, panels cover cutouts in duct to provide access for inspection and cleaning.
For technical drawings and 3-D models, click on a part number.
Quick-Disconnect Duct and Fittings
![](/prerenderstable/mvPRE/contents/gfx/imagecache/h01/h01a-quick-assembly-duct-connection-gil1548180352@halfx_635503701730000000.png?ver=imagenotfound)
Join duct and fittings with quick-release clamps for faster disassembly and cleanout than other duct systems.
Galvanized steel has good corrosion resistance.
For technical drawings and 3-D models, click on a part number.
![](/prerenderstable/mvPRE/contents/gfx/imagecache/176/1761k279_57da9629-6a1c-4005-96a6-bd9ff9537fec@halfx_1690994872.png?ver=imagenotfound)
Duct with access panel saves you from having to cut holes or add screws for a traditional cleanout door. The built-in panel slides back and forth, giving you easy access to the inside of the duct.
Opening | Galvanized Steel | |||||||
---|---|---|---|---|---|---|---|---|
Duct Size | ID | Lg. | Wd. | Lg. | Gauge | End Construction | Each | |
6 | 5 7/8" | 59 1/4" | 7" | 14" | 22 | Rolled | 00000000 | 0000000 |
7 | 6 7/8" | 59 1/16" | 7" | 14" | 22 | Rolled | 00000000 | 000000 |
8 | 7 7/8" | 59 1/16" | 7" | 14" | 22 | Rolled | 00000000 | 000000 |
9 | 8 7/8" | 58 3/4" | 7" | 14" | 22 | Rolled | 00000000 | 000000 |
10 | 9 7/8" | 58 3/4" | 7" | 14" | 22 | Rolled | 00000000 | 000000 |
12 | 12" | 58 3/4" | 7" | 14" | 22 | Rolled | 00000000 | 000000 |
14 | 13 15/16" | 58 3/4" | 7" | 14" | 20 | Rolled | 00000000 | 000000 |
16 | 15 15/16" | 58 3/4" | 7" | 14" | 20 | Rolled | 00000000 | 000000 |
18 | 17 15/16" | 58 3/4" | 7" | 14" | 20 | Rolled | 00000000 | 000000 |
20 | 19 15/16" | 58 3/4" | 7" | 14" | 20 | Rolled | 00000000 | 000000 |
22 | 22" | 58 3/4" | 7" | 14" | 20 | Rolled | 00000000 | 000000 |
24 | 23 15/16" | 58 3/4" | 7" | 14" | 20 | Rolled | 00000000 | 000000 |
Cleanout Plug Wrenches
![](/prerenderstable/mvPRE/contents/gfx/imagecache/240/2400k52-@halfx_637165782563101270.png?ver=imagenotfound)
![](/prerenderstable/mvPRE/contents/gfx/imagecache/240/2400k1p1-g01f-digital@halfx_636954364056574273.png?ver=imagenotfound)
Use this tool to install and remove recessed-head cleanout plugs.
Tip Lg. (Wd.) | Overall Lg. | Material | Color | Each | |
1 1/2" (1/2"), 1 1/4" (1 1/4"), 1" (1"), 1 1/8" (3/8"), 1 1/2" (1 1/2"), 7/8" (7/8") | 5 3/4" | Powder-Coated Iron | Red | 000000 | 000000 |