Red Sea Reefer Sump Pump Return Outlet Nozzle Assembly Part # R42188
 
Fits
Reefer Nano,
Reefer 170, Reefer 170A
Reefer XL 200 
Reefer 250, Reefer 250 V3, Reefer 250 V3A, Reefer 250 G2,
Reefer 350, Reefer 350 V3, 
Reefer XL 425 
Reefer 450
Reefer XL 525