A wide variety of corrosive resistant hose fittings available for connecting different pipe diameters (male to female).
 
BSPT X BSPP    
1/4"-1/8", 3/8"-1/8", 3/8"-1/4", 1/2"-1/4", 1/2"-3/8", 3/4"-3/8", 3/4"-1/2", 1"-1/2", 1"-3/4"