PVC pipes are widely used for plumbing, irrigation, and other purposes due to their durability, flexibility, and versatility. While threaded PVC pipes can be easily connected using fittings, non-threaded PVC pipes require a different approach when capping or closing them off.
Capping non-threaded PVC pipes is essential when you need to terminate a pipe run without connecting it to another pipe or fixture. This could be necessary in situations where an existing line needs to be closed off temporarily or permanently. In this article, we will discuss some effective ways about how to cap non threaded PVC pipe.
How to Cap Non Threaded PVC Pipe
Materials Needed
a. PVC pipe cap (same diameter as the pipe)
b. PVC primer
c. PVC cement
d. Measuring tape or ruler
e. Marker
f. Pipe cutter or hacksaw
g. Sandpaper or a deburring tool
h. Clean cloth or rag
i. Gloves and safety goggles
Prepare the PVC Pipe
Measure and Mark the Desired Length of the Pipe: Use a measuring tape or ruler to determine the exact length of the pipe. Make a clear mark on the pipe using a marker. Cut the Pipe Using a Pipe Cutter or Hacksaw: Secure the pipe to prevent it from moving while cutting. Carefully cut along the marked line using a pipe cutter or a hacksaw. Ensure the cut is straight and even.
Smooth the Cut Edge With Sandpaper or a Deburring Tool: There may be rough edges or burrs after cutting the pipe. Use sandpaper or a deburring tool to smooth the cut edge, ensuring a clean surface for the cap to adhere to.
Wipe the Pipe End Clean With a Cloth or Rag: Remove any dust or debris from the cut end of the pipe using a clean cloth or rag. This will help ensure a strong bond between the pipe and the cap.
Apply PVC Primer
Put on Gloves and Safety Goggles: PVC primer can be harmful if it comes into contact with your skin or eyes. Wear gloves and safety goggles to protect yourself.
Open the PVC Primer Container: Carefully open the container, following the manufacturer’s instructions.
Apply the Primer to the Outside End of the Pipe and the Inside of the Cap: Use the applicator brush provided with the primer to apply a thin, even layer to the outside end of the pipe and the inside of the cap. This will help clean and soften the PVC surfaces, ensuring a strong bond with the cement.
Allow the Primer to Dry for a Few Seconds: Wait for the primer to dry before proceeding to the next step. The primer should feel tacky but not wet.
Apply PVC Cement
Carefully open the container, following the manufacturer’s instructions. Apply a thin, even layer of cement to the primed areas on both the pipe and the cap: Use the applicator brush provided with the cement to apply a thin, even layer to the primed areas. The cement should cover the entire primed surface on both the pipe and the cap. Be sure not to apply too much cement, as this can cause the joint to weaken.
Attach the PVC Cap
Attaching the PVC cap to a non-threaded PVC pipe is a crucial step in creating a secure and watertight seal. To do this, first ensure that both the pipe end and the inside of the cap have been properly cleaned, primed, and coated with PVC cement. With the cement applied, carefully align the cap over the end of the pipe. Press the cap firmly onto the pipe while giving it a slight twist to ensure the even distribution of the cement and a secure connection.
Maintain pressure on the cap for 15–30 seconds, allowing the cement to bond the cap and pipe together. During this time, any excess cement that may have squeezed out of the joint can be wiped away with a clean cloth or rag. By following these steps, you can effectively attach the PVC cap to the non-threaded PVC pipe, ensuring a strong and watertight connection.
Allow the Cement to Cure
Allowing the cement to cure is essential for ensuring a strong, leak-proof seal between the PVC pipe and cap. After attaching the cap, let the cemented joint cure undisturbed for at least 15 minutes before handling the pipe. This initial cure time allows the cement to set and prevents the cap from shifting or detaching.
For optimal strength and a watertight seal, allow the joint to cure for a full 24 hours. During this time, avoid applying any pressure or stress to the joint, and keep the pipe dry, as exposure to water or moisture can weaken the bond between the pipe and cap.
By allowing the cement to cure properly, you can be confident in the durability and integrity of the connection between the non-threaded PVC pipe and the cap.
Test the Capped Pipe
After completing the process of capping the non-threaded PVC pipe, it is essential to test the capped pipe to ensure a secure and watertight seal. Begin by visually inspecting the joint where the cap meets the pipe. Check for any gaps or inconsistencies in the cement application, which could indicate a weak or incomplete seal. If you find any issues, you may need to repeat the capping process to ensure a proper seal.
Next, if the pipe is part of a plumbing system, you can perform a water pressure test to check for leaks. To do this, turn on the water supply and gradually increase the water pressure in the system. Observe the capped pipe closely for any signs of water leakage. If you notice any leaks, turn off the water supply, drain the system, and repeat the capping process to address the issue.
In some cases, you may want to perform an air pressure test instead of a water pressure test, especially if the pipe is part of a compressed air system or if water testing is not feasible.
To perform an air pressure test, connect an air compressor to the system and gradually increase the air pressure while monitoring the capped pipe for any signs of air leakage. If you detect any leaks, turn off the air supply, depressurize the system, and repeat the capping process to ensure a proper seal.
Frequently Asked Related Questions
What Are the Names of Pvc Fittings and Their Applications?
PVC pipe fittings come in various shapes and sizes, each designed for specific purposes. Here is a list of common PVC pipe fitting names and their uses:
- Coupling: Connects two pieces of PVC pipe of the same diameter.
- Reducing Coupling: Connects two pieces of PVC pipe with different diameters.
- Elbow (90-degree and 45-degree): Changes the direction of the PVC pipe at either a 90-degree or 45-degree angle.
- Tee: Connects three pieces of PVC pipe, forming a T-shape. It allows the flow to be split or combined.
- Reducing Tee: Similar to a regular tee, but with one or more of the connections designed for a smaller diameter pipe.
- Cross: Connects four pieces of PVC pipe, forming a cross shape. It allows the flow to be split or combined in multiple directions.
- Cap: Seals the end of a PVC pipe, preventing water or air from flowing through it.
- Plug: Similar to a cap, but designed to fit inside the pipe instead of over it.
- Union: Connects two pieces of PVC pipe and allows for easy disconnection and reconnection without cutting the pipe.
- Reducer: A reducer is used to connect pipes of different diameters. It has two ends with different sizes, allowing for a smooth transition between the two pipe sizes.
- Union: A union is a fitting that allows for easy disconnection and reconnection of pipes without cutting or altering the pipe. It consists of three parts: a nut, a female end, and a male end.
- Wye: A wye fitting is used to create a branch in a pipe system at a 45-degree angle. It is similar to a tee but has a more gradual curve, which helps reduce turbulence and pressure loss in the system.
- Cross: A cross fitting has four openings, allowing for the connection of four pipes. It is used to create a junction where two pipes intersect at a 90-degree angle.
- Saddle Tee: A saddle tee is a clamp-on fitting that allows for the connection of a new pipe to an existing pipe without cutting or altering the existing pipe. It is often used for adding a branch to a pipe system.
- Repair Coupling: A repair coupling is used to fix a damaged or leaking pipe. It consists of two halves that can be placed around the damaged section of the pipe and tightened to create a watertight seal.
These are just a few examples of the many PVC pipe fittings available. Each fitting serves a specific purpose in creating a functional and efficient pipe system.
These are just a few examples of the many PVC pipe fittings available. Each fitting serves a specific purpose in creating a functional and efficient pipe system.
