what is this?

I've seen this set up at multiple houses.  what are they making?  Its obviously something some what popular concedering how often I've seen it.

Zany2020-10-18T08:04:00Z

If you sneaked into someone's house to take the pic, I'm more concerned about what you are doing! 

00

y2020-10-16T12:36:36Z

Meth lab?  I have no idea

11

Spock (rhp)2020-10-16T11:49:06Z

looks like it might be a cabinet hiding a RO whole house water filter or something with other water treatment function

02

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