A stub-out is the exposed portion of a pipe installed during a plumbing, electrical or gas rough-in that is ready for connection to a fixture or device.
What is a plumbing stub out?
The pipes that go to the toilets, sinks, showers and drains--as well as any pipes that vent to the roof--must be in place and tested before the walls are added. The process of laying these pipes, and putting protective plugs or caps to keep building debris out, is called a plumbing stub out.
What is a stub in Electrical Engineering?
What is an electrical stub? In microwave and radio-frequency engineering, a stub or resonant stub is a length of transmission line or waveguide that is connected at one end only. Therefore, stubs are most commonly used in UHF or microwave circuits in which the wavelengths are short enough that the stub is conveniently small.
What is a stub in a microwave?
In microwave and radio-frequency engineering, a stub or resonant stub is a length of transmission line or waveguide that is connected at one end only. The free end of the stub is either left open-circuit, or short-circuited (as is always the case for waveguides).
What is the purpose of stubs in stripline circuit?
In a stripline circuit, a stub may be placed just before an output connector to compensate for small mismatches due to the device's output load or the connector itself. Stubs can be used to match a load impedance to the transmission line characteristic impedance.
What is meant by stub out?
to stop the end of something, such as a cigar, from burning by pressing it against something else.
What is a copper stub out used for?
Copper stub-out used during the rough-in plumbing phase for pressure testing. Allows stop valves to be installed during the trim-out phase.
How do I install a stub out?
1:272:30HOW TO STUB OUT PureFlow PEX | Viega - YouTubeYouTubeStart of suggested clipEnd of suggested clipSelect the desired location to terminate the distribution lines. Using either a horizontal wood 2x4MoreSelect the desired location to terminate the distribution lines. Using either a horizontal wood 2x4 or vigas stub out bracket. Create a support for the pure flow PEX tubing to stub out insert.
What is a stub out location?
A “stub-out” location is any location where the plumbing terminates at a fixture such as a toilet, shower, or sink faucet.
How do you use a stub out clamp?
1:473:27PEXRITE - YouTubeYouTubeStart of suggested clipEnd of suggested clipFrom the back to tighten twist and push the back nut of the 701. In a clockwise. Direction. The 701MoreFrom the back to tighten twist and push the back nut of the 701. In a clockwise. Direction. The 701 clamp secures your stub out with no soldering. The pecs right turn out number 704.
What is a stub pipe?
What is Stub-In? In case of a Stub-In, A larger hole is drilled in the Header or Run Pipe and branch pipe whose end is contoured similar to the inside diameter (ID) of the Header is fitted inside the hole.
How far should a stub out extend through a finished wall?
Like the supply stub-outs, the drain stub-out extends from a fitting -- usually a sanitary tee -- to a point 3 or 4 inches beyond the wall.
What is a PEX copper stub out?
Stub out elbows primarily used when installing PEX pipe for plumbing applications and are used to stub out of the wall and allow for further connection of outlet stop valves and plumbing fixtures.
How long is a stub out?
Connecting Stub-Outs in Finish Phase Plumbers have different preferences when it comes to the ideal length, according to a discussion at Plbg.com, but most make them from 3 to 6 inches long.
What is the pipe that comes out of the wall?
The plumbing vent, also known as a vent stack, helps regulate the air pressure in your plumbing system. Just as drain pipes remove water and waste from your home, the plumbing vent pipe – also known as a plumbing air vent – removes gas and odors.
How do you stub out a toilet?
Insert the line through the bottom plate on the wall, approximately 8 inches to the left of the toilet's center line. Connect this supply line at the water line attached to the sink. Use a 90-degree elbow or stub-out fitting to insert the water line into the surface plane of the wall.
What is a drain stub out?
The plumbing stub-outs are the end result of the rough-in phase of plumbing a residential or commercial building. They are usually installed while the walls are still uncovered; and after the drywall work and painting is complete, a plumber comes back and hooks them up to the plumbing fixtures.
What is a stub in a transmission line?
A stub is a short-circuited section of a transmission line connected in parallel to the main transmission line. A stub of appropriate length is placed at some distance from the load such that the impedance seen beyond the stub is equal to the characteristic impedance. What is double stub matching?
What is a stub in microwave?
In microwave and radio-frequency engineering, a stub or resonant stub is a length of transmission line or waveguide that is connected at one end only. Therefore, stubs are most commonly used in UHF or microwave circuits in which the wavelengths are short enough that the stub is conveniently small. Click to see full answer.
What is a stub in microwave?
In microwave and radio-frequency engineering, a stub or resonant stub is a length of transmission line or waveguide that is connected at one end only. The free end of the stub is either left open-circuit, or short-circuited (as is always the case for waveguides).
What is a radial stub?
Radial stubs are a planar component that consists of a sector of a circle rather than a constant-width line. They are used with planar transmission lines when a low impedance stub is required. Low characteristic impedance lines require a wide line. With a wide line the junction of the stub with the main line is not at a well defined point. Radial stubs overcome this difficulty by narrowing to a point at the junction. Filter circuits using stubs often use them in pairs, one connected to each side of the main line. A pair of radial stubs so connected is called a butterfly stub or a bowtie stub.
Why are stubs used in UHF?
Therefore, stubs are most commonly used in UHF or microwave circuits in which the wavelengths are short enough that the stub is conveniently small. They are often used to replace discrete capacitors and inductors, because at UHF and microwave frequencies lumped components perform poorly due to parasitic reactance.
Why do you need a stub on a stripline?
In a stripline circuit, a stub may be placed just before an output connector to compensate for small mismatches due to the device's output load or the connector itself. Stubs can be used to match a load impedance to the transmission line characteristic impedance. The stub is positioned a distance from the load.
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Overview
In microwave and radio-frequency engineering, a stub or resonant stub is a length of transmission line or waveguide that is connected at one end only. The free end of the stub is either left open-circuit, or short-circuited (as is always the case for waveguides). Neglecting transmission line losses, the input impedance of the stub is purely reactive; either capacitive or inductive, depending on the electrical l…
Open circuited stub
The input impedance of a lossless open circuit stub is given by
It follows that depending on whether is positive or negative, the stub will be capacitive or inductive, respectively.
The length of an open circuit stub to act as an inductor L at an angular frequency of is:
The length of an open circuit stub to act as a capacitor C at the same frequency is:
Resonant stub
Stubs are often used as resonant circuits in oscillators and distributed element filters. An open circuit stub of length will have a capacitive impedance at low frequency when . Above this frequency the impedance is inductive. At precisely the stub presents a short circuit. This is qualitatively the same behaviour as a series resonant circuit. For a lossless line the phase change constant is proportional to frequency,
Stub matching
Stubs can be used to match a load impedance to the transmission line characteristic impedance. The stub is positioned a distance from the load. This distance is chosen so that at that point the resistive part of the load impedance is made equal to the resistive part of the characteristic impedance by impedance transformer action of the length of the main line. The length of the stub is chos…
Radial stub
Radial stubs are a planar component that consists of a sector of a circle rather than a constant-width line. They are used with planar transmission lines when a low impedance stub is required. Low characteristic impedance lines require a wide line. With a wide line the junction of the stub with the main line is not at a well defined point. Radial stubs overcome this difficulty by narrowing to a poin…
See also
• Quarter wave impedance transformer