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Mar . 25, 2024 10:45 Back to list

How to Transition From HDPE to PVC Pipes china transition coupling hdpe to pvc

If you need to connect a high density polyethylene (HDPE) pipe to a polyvinyl chloride (PVC) pipe, you need to use a transition fitting to ensure a leak-proof seal between the two pieces of plastic pipe. Different types of plastic expand and contract at different rates. A transition fitting allows each pipe to expand and contract at its own rate and keeps a seal between the two.

 

DN150 HDPE pipes for irrigation

 

Step 1

Cut the end of the HDPE and the PVC pipe at 90-degree angles with a hacksaw or miter saw to ensure a flat face on the end of each pipe.

 

Step 2

Debur the cut ends of the pipe with a razor blade or a deburring tool. A bur is the material left on the pipe after you cut it with a saw. This material could break off and get caught in a pump or drain at some point so it is important to remove it.

 

Step 3

Slide the transition fitting onto the HDPE pipe.

Step 4

Slide the HDPE pipe over the end of the PVC pipe. It is important that the inside diameter (ID) of the HDPE pipe be as close to the outside diameter (OD) of the PVC pipe as possible. This creates a butt fusion joint between the two pipes.

 

Step 5

Slide the transition fitting over the HDPE and PVC pipe and center it between the two pieces. Tighten each end of the fitting with a pipe wrench.

 
 
 
 

How to Connect Cast Iron to PVC

 
 
 

If you begin a remodeling or repair project in an older home, you may find that the plumbing lines are made form cast iron. Newly constructed homes have now switched over to using PVC plumbing pipes, which are more cost effective and easier to work with. With the right tools and a special coupling, you can easily connect this newer technology to the older cast iron pipes.

 

Step 1

Turn off any water source that may be feeding the pipes you wish to join. Remove any surrounding obstructions from the cast iron pipe, such as insulation, so you can gain the best access to it while working.

Step 2

Cut the existing cast iron pipe if necessary. If you have a leaky or burst section of pipe and need to switch over to PVC, you will have to cut the existing pipe. This can be done by using a pipe cutter made specifically for cutting pipe. A faster option is to use a reciprocating saw, also known as a "Sawzall."

 

Step 3

Connect one side of your no-hub coupling connector to the cast iron pipe. A no-hub connector is the standard coupler to join PVC and cast iron pipes. They are available in many sizes, so make sure you purchase the one best suited for your particular needs.

Step 4

Tighten the bolts on the cast iron pipe end of the coupling. This tightening clamp will accept either a socket wrench or a Phillips screwdriver.

 

Step 5

Insert the PVC pipe into the other side of the no-hub coupling. Make sure you insert it all the way, so the end is as flush with the cast iron pipe as possible. A small gap or mismatch is not an issue. Tighten the clamp on this end as well, and make sure everything feels tight and secure. Your pipes are now properly joined.



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