APOLLO A5110/A5610 PART # 13 :
Upper port adapter. 1 of 2 pieces as pictured on Left. See also part#AP5217
Connect your air hose to the upper port of your Apollo 5000 Series Spray Gun. Simply remove the blanking cap and add the upper port insert. You can now attach your hose to the top of your spray gun, thereby increasing your air cap pressure and enabling you to put the hose over your shoulder.