DIY Gas Sep Combo

Installing new 20 & 12kw diesel NL gen-sets.
Because of limited room in my forward machinery space, I would like to build my own glass muffler-gas-sep units.
In searching the web for models to compare to, I think I can figure water depth (weight) vs in-let and out-let.
I just could use some reinforcement on the internal plumbing.

Anybody been here before?

 

Do you mean a wet exhaust muffler?

 

Well, yes. But a combo wet muffler with a next stage gas sep.
Here the water drains below the hull and the cooled exhaust gasses blow overboard.
A much quieter exhaust system.
Centec and others make them, just not accommodating to my area to install.
I want to make my own to fit the area I have. Could use a peek inside one to ensure I'm on a correct path.