Tackling a Pipe Coating Job

“ I’m not sure how to layout the coating process in an apartment. The apartment is all on one floor of a building and has 2 bathrooms, a laundry room, and a kitchen. There’s one main vent stack and most of the piping is under the floor with the stack, the bathroom sinks, the kitchen sink, and the laundry drain the only lines coming up out of the floor. The bathrooms are back to back and the kitchen and laundry all share the common vent. The risers for the bath and kitchen sinks are 2” to the wall with a 1 ½” p-trap connector. There are tub/shower combos in each bath as well as a water closet in each bath.  Do I coat each line segment separately or can I coat multiple diameters in fewer pulls?”

This is a great project for a two-man crew to tackle. This project can be completed in an 8-hour window. Here’s the best way to attack the job. One crew member can prepare the space by laying out protective tarps throughout the work area. The second person can pull both water closets, disconnect the p-traps between the wall and the sinks, and remove the drain screens from the tub/shower combos. To minimize sewer gas, rags may be stuffed in each opening.

Video inspection of the pipes is next. Recording lengths and diameters and cleaning can be started after the first lines are inspected by one crew member. The second crew member can finish inspecting and recording pipe diameters and distances. Once complete with inspection, the first crewman can continue cleaning pipe while the second crew member can lay out the amount of resin for each segment of pipe and record the needed resin weights. He can then follow the crew member’s cleaning pipe by applying the coating to the cleaned pipe.

The applicator will follow the cleaning crew member through the lines. If the first line cleaned is the stack, then that will be the first line coated. There are a couple of options here. One option would be to coat from the attic if an attic space or from the roof.

When there is a diameter change in a line segment to be coated, you would coat the farthest from the entry point first. If you have 10’ of 3” pipe that is accessed through a 2” pipe that is 7’, you would mount the brushes for the 3” pipe, push through the 2” segment, and coat the 3” first followed by a brush size change to coat the 7” of 2” pipe. Each coat will apply approximately 0.5mm of material with a 5-minute wait between coats. 

After applying the estimated material, the operator can weigh the containers to see if the minimum amount of resin has been applied to that segment. Once verified the operator can move to the next segment. The person cleaning the lines ahead of the applicator will obviously finish before the coating process. They can begin resetting fixtures and reconnecting the p-traps to the lines cleaned and coated and remove protective tarps to return the space to full service.

The unit can be occupied immediately after completing the job well within the 8-hour window. For more information contact us at +1-888-354-6464 or email info@pipeliningsupply.com.

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