Overboard Discharge connected to Bilge Pump Discharge?

[vesper]

hi,  while replacing the original bilge pump, I decided to replace the hose from the pump to the thru hull on the port side,  and discovered a "T" fitting with another discharge connected to it.  I assumed that was the connection to the head - sink/shower sump pump, but during another project discovered that is pumped thru a thru haull on the stbd side.  so what is "Teeed" into the bilge discharge line at the thru hull?

thanks,

Greg Pabst
Baltimore
"Vesper" #246

[RayNWanda]

Over the years these boats have all been modified and changed. You will probably have to trace the line to find out.