Hi Marc, re your questions: ".....how can i tell if the pressure is reduced right though..there is no guage....ie to 30 psi what is the right pressure for rotary pump... i have seen other setups with numeric guage..do i need this..." If you have a semi commmercial or commercial machine requiring plumbing then it's all the same spec (re pressure limiting & filtering) as noted for Kevin above. Try to forget "psi" most of us converted to kPa a long time ago and now have difficulty converting back...hehehe! You need to reduce down to a line (incoming) pressure between say 350 to 500 kpa, we work to 350. The WATER pressure guages (fitted to most but not all machines) measure only 2 things. One is the in line pressure "at rest" (which is the pressure as reduced by the limiting valve e.g. 350kPa / 3.5 bars / 3.5 atmospheres pressure as viewed on whatever is the scale of the guage), and the other is the line pressure of the water while the pump is pumping to make coffee, which will be in the region of 8 to 10 bars / atm. This (the guage) basically tells you whether a) the limiting valve has failed or b) the pump is failing or has failed or c) there is a mains water failure or d) you (or I or someone) forgot to turn the tap on hehe! If you dont have the guage (as in Bo-ema & some other machines), you can ignore what the inline "brewing" pressure is (because you cannot read it on the guage that is not there), and happily go about brewing your espresso dependent only on the other variables that apply for you to mae a good one! In any case if a water pump fails or the mains water has not been turned on, it is quite obvious. ".....also where do i get new filters in melbourne when i need them,,,,ie how much and where,,,,and how often,??....." Dont know Melb, but you will normally buy replacement cartridges from wherever you buy the filter system. I suggest going to a specialist. Hope this helps, FC.
