Rotary Systems' entry level 001-Series swivel union is designed for the hose reel industry, where pressures may be high but rotational speeds and side loads are at a minimum. This economical swivel union uses a plated shaft and o-ring seals.Rotary Systems' entry level 001-Series swivel union is designed for the hose reel Rotary Systems' entry level 001-Series swivel union is designed for the hose reel industry, his economical swivel union uses a plated shaft and o-ring seals.