Waterway Button Air Injector - White or Gray. Used to replace many types of other air injectors, particularly in Chinese spas with chrome or brass air injectors.

• 19mm diameter head
• 9mm hole required
• 1/4" straight barb suits 1/4" / 6mm tubing in difference to all other injectors suiting 3/8" / 9mm tubing

Can be used as an air injector (although 1/4" manifolds are not available, however 3/8"B x 1/4"B reducer adaptors are) or commonly used as an airbleed return fitting on LA Spas and others to allow release of air from pumps and heater when filling (usually mounted in the filter housing).