Email from legacy manufacturing rep 4 days ago.
Thank you for contacting Legacy Manufacturing. You are correct, the only difference between the regular garden hose and the pro hose are the fittings. Unfortunately, the pro fittings are only manufactured for the 5/8” hose. The custom hose centers work for both water and air, but the only hose offered in water would be the 5/8” hose. I apologize for the inconvenience.
Please let me know if you have questions.
Customer Sales Specialist
6509 Partners Ave.
Marion, IA 52302
O:319-373-7305 ext. 141