Elbows
Elbows change the direction of a pipe run without altering its size, covering material options from ABS drain lines to copper, brass, black steel, and galvanized steel supply and gas piping. MegaPress elbows extend press-fit convenience to steel and stainless piping systems.
Matching elbow material to the pipe system it connects to keeps the joint compatible with the rest of the run, since mixing incompatible metals can lead to galvanic corrosion over time. Press-fit elbows have become a common choice where torch work is restricted or impractical on the job site.
Subcategories
- ABS DWV Elbows: ABS DWV elbows are used in drain, waste, and vent lines where a black plastic drainage system is already in place. They solvent weld to ABS pipe and are sized to standard DWV diameters.
- Black Elbows: Black elbows fit black steel pipe systems, commonly found in gas lines and some older heating systems. They thread onto pipe and come in standard 45 and 90 degree angles.
- Brass Elbows: Brass elbows offer corrosion resistance in water supply and some gas applications where a metal fitting is preferred over plastic. They thread onto pipe and hold up well in exposed or high-moisture locations.
- Copper Elbows: Copper elbows are a rough-in staple for water supply lines, sized to standard copper tube diameters and joined by soldering or, in press-fit versions, by a press tool. They remain one of the most stocked fittings on a plumbing truck.
- Galvanized Elbows: Galvanized elbows fit galvanized steel pipe systems still found in older buildings and some water supply retrofits. They thread onto pipe and resist corrosion better than plain black steel in wet environments.
- MegaPress Elbows: MegaPress elbows are a press-fit style for steel and stainless piping that eliminate the need for threading or welding, letting a technician complete a joint with a press tool in a fraction of the time a threaded connection takes.
Buying Guide
Confirm pipe material first. An elbow has to match the pipe it will join, whether that is copper, PVC, ABS, steel, or PEX, since mixing materials at a joint without the correct transition fitting leads to a poor seal.
Check the angle needed for the run. Ninety degree elbows handle most direction changes, but a 45 degree elbow produces less flow restriction and is often preferred on longer drain or supply runs where every bit of flow matters.
Match the joining method to the tools already on the truck. Press-fit elbows speed up installation where a press tool is already in use, while soldered or threaded elbows remain the standard where that equipment is not on hand.
Consider wall thickness and pressure rating for Elbows used in supply or gas lines, since a fitting rated for drainage service is not necessarily rated for the pressures found in a potable water or gas system.
Stock a range of standard sizes rather than ordering one at a time. Ninety degree elbows in the common half inch, three quarter inch, and one inch sizes cover the bulk of residential rough-in work, and having them on the truck avoids a mid-job supply run.
Frequently Asked Questions
What is the difference between a 45 degree and a 90 degree elbow?
A 90 degree elbow makes a sharp right-angle turn and is used where space is tight, while a 45 degree elbow makes a gentler turn that restricts flow less, which is often preferred on longer drain and vent runs.
Can a copper elbow be joined to a PVC pipe directly?
Copper and PVC cannot be joined directly at an elbow fitting, and a proper transition fitting rated for both materials is needed to make that connection watertight.
Are press-fit elbows as reliable as soldered copper elbows?
Press-fit elbows are widely used in professional plumbing and mechanical work when installed with the correct press tool and jaw size, and many manufacturers back them with the same service life expectations as soldered joints.
Do black steel elbows work on both gas and water lines?
Black steel elbows are most commonly used on gas lines and some heating systems, and local code should be checked before using them on a potable water line, since galvanized or other approved materials are often required there instead.
How is elbow size measured for ordering?
Elbow size is measured by the nominal pipe diameter it fits, not the outer dimension of the fitting itself, so matching the elbow to the pipe's nominal size listed on the existing run is the safest way to order the right part.
Resources
Subcategories
- ABS DWV Elbows: ABS DWV elbows are used in drain, waste, and vent lines where a black plastic drainage system is already in place. They solvent weld to ABS pipe and are sized to standard DWV diameters.
- Black Elbows: Black elbows fit black steel pipe systems, commonly found in gas lines and some older heating systems. They thread onto pipe and come in standard 45 and 90 degree angles.
- Brass Elbows: Brass elbows offer corrosion resistance in water supply and some gas applications where a metal fitting is preferred over plastic. They thread onto pipe and hold up well in exposed or high-moisture locations.
- Copper Elbows: Copper elbows are a rough-in staple for water supply lines, sized to standard copper tube diameters and joined by soldering or, in press-fit versions, by a press tool. They remain one of the most stocked fittings on a plumbing truck.
- Galvanized Elbows: Galvanized elbows fit galvanized steel pipe systems still found in older buildings and some water supply retrofits. They thread onto pipe and resist corrosion better than plain black steel in wet environments.
- MegaPress Elbows: MegaPress elbows are a press-fit style for steel and stainless piping that eliminate the need for threading or welding, letting a technician complete a joint with a press tool in a fraction of the time a threaded connection takes.
Buying Guide
Confirm pipe material first. An elbow has to match the pipe it will join, whether that is copper, PVC, ABS, steel, or PEX, since mixing materials at a joint without the correct transition fitting leads to a poor seal.
Check the angle needed for the run. Ninety degree elbows handle most direction changes, but a 45 degree elbow produces less flow restriction and is often preferred on longer drain or supply runs where every bit of flow matters.
Match the joining method to the tools already on the truck. Press-fit elbows speed up installation where a press tool is already in use, while soldered or threaded elbows remain the standard where that equipment is not on hand.
Consider wall thickness and pressure rating for Elbows used in supply or gas lines, since a fitting rated for drainage service is not necessarily rated for the pressures found in a potable water or gas system.
Stock a range of standard sizes rather than ordering one at a time. Ninety degree elbows in the common half inch, three quarter inch, and one inch sizes cover the bulk of residential rough-in work, and having them on the truck avoids a mid-job supply run.
Frequently Asked Questions
What is the difference between a 45 degree and a 90 degree elbow?
A 90 degree elbow makes a sharp right-angle turn and is used where space is tight, while a 45 degree elbow makes a gentler turn that restricts flow less, which is often preferred on longer drain and vent runs.
Can a copper elbow be joined to a PVC pipe directly?
Copper and PVC cannot be joined directly at an elbow fitting, and a proper transition fitting rated for both materials is needed to make that connection watertight.
Are press-fit elbows as reliable as soldered copper elbows?
Press-fit elbows are widely used in professional plumbing and mechanical work when installed with the correct press tool and jaw size, and many manufacturers back them with the same service life expectations as soldered joints.
Do black steel elbows work on both gas and water lines?
Black steel elbows are most commonly used on gas lines and some heating systems, and local code should be checked before using them on a potable water line, since galvanized or other approved materials are often required there instead.
How is elbow size measured for ordering?
Elbow size is measured by the nominal pipe diameter it fits, not the outer dimension of the fitting itself, so matching the elbow to the pipe's nominal size listed on the existing run is the safest way to order the right part.