The Blue-White Industries A-014N-6A is a 3/8" x 3/8" anti-siphon valve with .5 - .25 male pipe threading. It is a genuine Blue-White product.
Tube Assembly A-100N (-4T) 1/4" OD Norprene 3/8" OD Tube Compression fitting
Price: $64.45
Flow Indicator, for Rainbow offline chlorinators
Price: $20.49
Floating Dispenser, Deluxe 1" Tab Dispensing Floater
Price: $3.99
Chlorinator in-line model 320
Price: $172.18-$526.40