0.5mb drop on tightness test - Should I be worried?

[Old Account]

Is it a degree in plumbing or any degree?

Strictly plumbing, gas,oil, solar, heat pumps, literally everything about plumbing and heating

 

[firemant]

It depends on the job doesn’t it. In regards to a plumber you cannot run a company without having the degree.

Ah. So now it is a Degree, not a Masters. And only certain business'?
TBH, I am still not convinced.. This mentions what is required, and mentions plumbing. Nowhere does it mention degrees:

How to become a freelancer or self-employed in Germany - TransferWise