More is not always better.

I recently found a double trap under one sink (with a corrugated drain pipe thrown in for good measure) and a missing trap under another sink in the same house.
         
The double trap drastically slowed the drainage from the sink.  The sink that was missing the trap had that nasty sewer odor smell coming from it.

P-traps (or older S traps & drum traps) actually have a purpose under the sink or tub/shower or in a toilet.

That U shaped bend under the sink traps a plug of water in it that keeps nasty sewer gases from coming back up the pipe into the house.  Of course, it can also catch rings, earrings and other items that may be inadvertently dropped down the sink.

Two traps can allow a vacuum to form slowing or even completly stopping water from draining down the pipe.

It shouldn’t take the plumber too long to move the extra trap to the right sink.

No one likes to think of mice or rats being in the house.  (Well, except those rat loving friends of mine.  They love their little pets but that’s a different breed of rodent.)

It can be a little disconcerting when opening electrical panels and finding live mice inside.  Not quite so disconcerting is the one that’s been there for awhile, such as the one in the picture below.

That’s one of several reasons the openings in the electrical panels are supposed to be covered.

It doesn’t bother me quite so much when they are in the propane tank lid outside!

You know what a crack pipe is.  You know what a crap pipe is.

Ever seen a cracked crap pipe?

Yeah, I think it’s time to replace the crap pipe!