Bubbler+ 18 Concrete Air Injector Kit - White

Modular manifolded air injection kit with 6 x 3 port manifolds, risers and slip fit self aligning white injector cap - for concrete pool or spa installations

34mm diameter top 
3mm profile 
6mm diameter hole (surface area 28.26mm2) 

50mm manifolds 381mm long each section.
15mm risers 150mm long, spaced 115mm apart

18-36 injectors per installation dependant on make/model/performance of the air blower used, and water depth installed at.

Tested with Spa-King 1.5hp Peacemaker blower: 
up to 500mm depth - 36 injectors 
500-1000mm depth - 27 injectors

Note that most air blowers in the market do not perform to this level and likely restricted to 18 injectors.