First off, I'm a amature at this hobby. I'm in my 3rd year as a member of The Subcommittee. Therefore, everybody knows where I'm coming from.... I have been doing some internet hunting for a water pump for my OTW Type VIIc U-boat (the hull is completed). I found a Surflo RV/Marine pump OEM 100-000-21. It is rated at 2.1 bars (30 PSI) @ 12 volts. The size is 4.8" L, and less than 2" W/H. I think it would fit into a 3.5" WTC. It will be a tight fit with the intake and outlet ports opposite at the pump head (2.6" tip to tip). I was going to use a pressure switch to stop the flood and a Check valve on the pump intake. I haven't figured out how to control blowing the ballast yet. I could use another valve and simply dump the ballast, or set-up a control circuit to reversing the water pump.
1. Is this water pump OK to use?
2. Suggestions on controls?
3. I'm willing to learn!
"A man's got to know his limitations"
Harry Callahan SFPD