Line Stopping

What is Line Stopping?

When you can’t stop the flow in a line and need to do a repair without draining the system or causing a long shut down, a line stop works well. Line stopping is similar to hot tapping in that you will be tapping into a live line under pressure. You will then remove the hot tap machine and place a line stop machine onto the valve. A line stop machine has rubber bladders that act like line plugs that will expand after being lowered down into the pipe. Once the flow is stopped, the repair can be performed. Completion of the job has the line stop machine retracted, removed and shutting the value off. A completion plug setting tool is placed on the valve and screws a completion plug down into the outlet. You remove the plug setting tool, remove the valve and add a cap and your job is completed.

Subscribe in a reader

Line Stop Products


Eliminate Shut-downs and Draining the System!


Qualitech CopperStopper Line Stop


Go to to purchase the Qualitech CopperStopper

  • Exact Fit O.D. on Copper Tubing means no electrolysis and a sure fit on the pipe
  • Please call for pricing for size 6 x 5″


  • Panel: Type 304 (18-8) Stainless steel per ASTM A240
  • Gasket: Nitrile (Buna-N, NBR) Chek-O-Seal -40° F – +180° F bursts to 212° F
  • Lugs: Type 304 (18-8) Stainless steel per ASTM A240
  • Bolts: Type 304 (18-8) Stainless steel per ASTM A193 and A194
  • Hex Nuts: Furnished with fusion bonded coating to prevent seizing and galling
  • Outlet: Schedule 80 Type 304/304L Stainless Steel seamless, machined MIP
  • Brass Plug: Half-hard, SAE, CA-360 per ASTM B-16
  • Cap: Standard MI type
  • Working Pressure: Water and Sewer Maximum 150 PSI, Air Maximum 30 PSI
  • Produced in America

Leave a Reply

Your email address will not be published. Required fields are marked *

9 + = eleven

%d bloggers like this: