top of page

LINE
ISOLATION

Pressure Connections, Line Stopping, Valve Insertions and Bypass Pumping

No Time to Waste? Click on one of the services below to get where you need to go quickly.

PROD HUS Line Isolation Vector Images.png

Tapping

2" - 24" CUTTING CAPABILITIES

All pipe types including PVC, Ductile Iron Pipe (DIP), Cast Iron Pipe, Steel, Asbestos Cement (AC) and more

Pressure Connections (Taps)

Hot Tapping, or Pressure Connection, is the process of making a connection to an existing pressurized or non-pressurized pipe without having to empty the pipe.

 

This is done by attaching a mechanical sleeve and gate valve to an existing water main and connecting a cutting machine that mechanically cuts a portion of the main (called a coupon) and retains it in the machine. This then allows the machine boring bar to come out of the main and the operator fully then closes the gate valve and successfully creates a new connection to the pipe.

Tapping

Holliday Utility Services provides hot tapping for creating new services or connections to existing distribution and transmission mains. We can provide all the necessary materials for the job, including AIS sleeves, and arrive at the job site with all necessary tools, equipment, and personnel to safely complete the job. We have successfully performed tapping for a variety of different pipe types including PVC, DIP, AC/Transite, C900/C909, and Steel. We have the ability to provide small diameter taps as well as large diameters up to 24".

Tapping Photo Gallery

See a collection of tapping images from the field including the pipe machine, pipe coupon and completed photo.

Line Stopping

Line stopping (or line plugging) isolates part of the pipe network to allow for work to be performed on the existing pipe. It serves as a control point for the system and works in both single directional and bi-directional water flow circumstances.

The means of line stopping involve inserting a mechanical or pneumatic plug (sometimes called a bladder) into the pipe. This is done by fastening a sleeve to the existing pipe and mounting a cutting machine on the sleeve with a sluice valve. The sluice valve is opened, exposing the cutting machine to the host pipe, and the cut is made under pressure, and the coupon is extracted. Once the coupon is pulled out, the sluice valve is closed the cutting machine is taken off, and a plugging machine is mounted. Once the plugging machine is mounted, the sluice valve is opened again, and the plug is inserted into the main and opened, thereby blocking the active flow in the pipe. This process can be held for hours or days depending on the application.

Stopping
Line Stopping Machine

Holliday Utility Services provides line stopping services for temporarily isolating existing distribution and transmission mains. We can provide all the necessary materials for the job, including AIS sleeves, and arrive at the job site with all the necessary tools, equipment, and personnel to safely complete the job. We have successfully performed tapping for a variety of different pipe types including PVC, DIP, AC/Transite, C900/C909, and Steel. We have the ability to provide small diameter taps as well as large diameters up to 24".

Line Stopping Photo Gallery

View our line stopping photo gallery to see how a line stop works.

Looking for something permanent instead?

Try a valve insertion. It takes less time and can be used multiple times, now or in the future, to maintain control of your pipeline.

image.png

Valve Insertions

Valve insertions gained in popularity over the last two decades with numerous types emerging in the marketplace. The goal of a valve insertion is to offer permanent and recurring control or isolation of a pipeline. 

The process for a valve insertion varies by manufacturer but Holliday Utility Services offers valve insertion from Mueller (The PermaSealTM Valve) and AVT (EZ Valve(r)Valve).

ValveInsert

For Valve Insertions, Sized 4" - 24," we offer EZ Valve

For Valve Insertions, Sized 4" - 12," we offer PermaSeal Valve

For more information on our valve insertions, visit our page below by clicking on the button.

HUS About us focus (2).jpg
bottom of page