Support for seperate pump

[deutzfahraustria]

Good afternoon,
would be possible to add a feature, for supporting seperate pumps like this: https://bilder.landwirt.com/0714/7d06ca5a4f35262f246d55c8135841ab.jpg
With them, you can fill barrels which haven't got a pump itself.
I thought about an tag like hoseSystem isPump="true"
at the moment you can only fill the pump (if it got capacity), but not empty it at the same time.
Also, if the barrel is already filled up, the pump doesn't fill up from the pit, but from the barrel.
Best regards