Title: The best scuba regulator - Chicago Tribune
Headings: The best scuba regulator
The best scuba regulator
How scuba regulators work
Considerations when choosing scuba regulators
Price
FAQ
Q. Do I need to buy first- and second-stage regulators from the same company?
Q. Do my regulators need regular maintenance?
Scuba regulators we recommend

Content: Our top pick is the outstanding Scubapro MK25 EVO/A700 Diving Regulator System, a combination that provides safety and easy breathing for experienced divers wherever they go and whatever conditions they encounter. How scuba regulators work
Scuba regulators are divided into first stage — which takes tank pressure down from a couple thousand pounds per square inch (psi) to around 140 psi — and second stage, the mouthpiece, which offers fine pressure adjustment for comfortable breathing. You may also have an octopus, or a standby second regulator for emergencies. Advertisement
The first-stage regulator is more complex. They are either diaphragm or piston operated. Diaphragms are more complicated but are actually cheaper to make. They’re often preferred for cold waters. Piston models are more expensive because although simpler they need to be made with greater precision. Piston regulators can handle higher air flow than those with a diaphragm. It can be important for professionals, though makes little difference to most leisure divers.