Pressure Regulator Adapter (PRA) for disposable N2O or CO2 cylinder gas. We advise you only use it with our stainless steel whippers or stainless steel soda syphons. The PRA allows you to charge cream whippers or soda syphons from our disposable N2O or CO2 gas cylinders. This means it is a cost effective and time efficient alternative to cream or soda charger cartridges. One of our cylinders contains (depending on cylinder size) the equivalent amount of gas of around 80 charger cartridges. Becuase one cylinder is the equivalent of 80 cartridges it saves huge amount of time (and energy!) screwing individual cartridges onto the top of cream whippers or syphons to charge them with gas. It also gives cafe, bar or restaurant managers greater control of stock to prevent pilferage. Fill whippers and syphons with the exact amount of gas you require. Your device (ie a cream whipper or soda syphon) can be filled with exactly the amount of gas required using the PRA and this can have significant cost savings. Crucially it will ensure you actually get whipped cream coming out of the cream whipper after it is charged! The same applies to a soda syphon - you will get fizzy water instead of flat water! Gas charger cartridges contain 10ml of nitrous oxide/carbon dioxide gas at 50 bar pressure. When you charge your device it needs to be pressurised to 100psi for the whipper to produce whipped cream or the syphon to produce fizzy water. However achieving this pressure is dependent on several factors including: 1. The amount of cream or liquid in the device. If the user has measured out exactly 500ml for a 500ml device (or 1000ml for a 1 litre device) then a single charger cartridge (or 2 for a 1 litre) will pressurise the device correctly. However in a busy cafe, bar or kitchen this often isn't done. 2. If the whipper hasn't been washed after the last use residual foam (ie bubbles of gas) remain inside which can result in over pressurisation and cream spitting out of the whipper unde