Here's is the best plumbing tricks compilation on the web. These tricks are good for DIYers and residential/commercial plumbers.

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Amazon affiliate links to all the products I used in this video:
2000 Grit Wet or Dry Sandpaper: https://amzn.to/2tODDmp
Milwaukee HoleSaw Kit (28-Piece): https://amzn.to/2T8TF9Q
MagTorch Butane Soldering Torch: https://amzn.to/2tNMlRV
Food Coloring for toilet test: https://amzn.to/2Hd98i7
8" Channel Lock Adjustable Pliers: https://amzn.to/2tNzcZm
3/8" Piggy Back Valve: https://amzn.to/2EIXR7i
1/2" Compression Valve: https://amzn.to/2VynTzU

DISCLAIMER: Got2Learn is NOT responsible for any damage done to a property of which the plumbing wasn't done by a professional, I do not recommend doing your own plumbing if you are unsure about what you are doing, always hire a LICENSED contractor when doing any type of plumbing so you can be covered by insurances if something does happen, these videos are for entertainment purposes only!