Australian Spa Parts

Waterway Button Air Injector - miniature sized - 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). White or grey coloured depending on supply. If colour is important you will need to specify when ordering.