well im pretty close to pressurized now since i have my regulator and diffuser . question.. i know the diffuser has the ceramic disc but can it only be used with a pressurized system? im thinking yes since i cant even blow thru the thing,and it did nothing with my hagen hooked up except build alot of back pressure in the cannister. maybe i didnt let it build enough pressure. when i unscrewed the top it released alot more pressure than normal. but after removing and checking i couldnt even get close to blowing through the thing..thanks