oh Hell Nooo !
do not do that or u will get electrocuted
it should be place in dry surrounding. the input should be connected to a pump in yr sump via tubing or if u hv an external filter , connect the input to the output of the filter.
the output of the UV should transfer the disinfected water back to the sump or can also straight to the man tank.
most UV filters come with instructions please chk them.
for it to be effective , the flow should be slow but not too slow . pls searchup more for more info on the internet .