Installing a Bathroom Drain Waste Vent System

Bathroom Drain Waste Vent System

Installing bathroom drain waste vent system may not be a work that you want to encounter with. But with the right equipments and steps, this job will be easy for you to handle on your own. This is a perfect project for people who want to save money on their house budget. So here are the steps on how to install the system.

You will need:

  1. Hand saw or power saw
  2. Latex Gloves
  3. Knife
  4. Pipe Cutters
  5. Felt Tip Pen
  6. 1 ½ ” To 4″ Pvc Pipes Depends On The Type Of Stack
  7. Pvc Tees
  8. Pvc Elbows
  9. Eye Protection
  10. Measuring Tape
  11. Forstner Bit To Match The Outside Diameter Of The Pipe


  1. The first thing that you want to do is the design plan. Every tub, sink, drains and toilet have to be vented to the outside through a vent stack. It is crucial to know the current location of the waste pipes if you are planning to add a new sink. DWV pipes are mostly made from PVC pipes. Cast iron or copper pipes are usually used in older homes.
  2. When you finish drawing your plans, file the plan and obtain a building permit you\’re your local government before starting the project. Check with your local township, town, county or city for any requirements. Before submitting the plan, work with the building inspectors as he/she will help you check any basic problems in the plan and correct them before any pipes are installed. This will help you save more time and money from re-working or removing the installation.
  3. Then, you have to measure accurately on how much straight pipes and fittings that you need. Search your equipment before going to the store. You can also purchase an extra PVC joint in case you need it. So in case you need to do correction, the parts are available. Measure all the cuts that will be required for the plan. You have to remember that the joints will result in being longer when added to the run.
  4. Next, make sure to leave a space for joining the pipes together when measuring out the lengths. If you add a coupling, about ½” extra clearance than the finished joint will require. Part of the pipes fits in the joint.
  5. De-burr the pipes on the inside and out after each cut using pocket knife or special de-burring tools. Re-cut the pipe and re-move the damaged section if there are any chips or cracks. Use the felt tipped marker or pencil to mark the pipe and joint. The pieces will line up when the joint is glued and cleaned. Then, start gluing the assembly together. Use a cleaner to clean the outside and the inside of the pipe. Coat the inside and outside of the coupling with PVC glue, make sure that glue covers the entire joint by making a ¼ turn when assembling the pipes.
  6. Align the joint and the pipe to the marks that you made earlier. Work from one direction to the other while remembering what pieces will be the last part to be joined together. Install temporary caps if your inspector needs to run a pressure test. Cut the caps off and hook the section to the main drainage system when the test is over. Leave the pipes to dry overnight or a day to make sure that every coupling is sealed completely.

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