The AT20 regulator is no longer available with the Unsealed Swivel Turret (UST) 1st stage. This is now supplied with the US4 1st stage. The AT20/US4 regulator has been designed for warm water diving. Just because it is warm water equipment does not mean it is of low quality. The AT20/US4 is a very good breathing regulator featuring our venturi control and it is also balanced.    

The first stage has 4 medium pressure ports but now without the swivel turret which is shown in the UST picture across. The medium pressure ports on the US4 first stage are on the body of the 1st stage itself. It now has only one high pressure port as opposed to two on the UST version. This regulator has been finished with as much care and attention to detail as any of our regulators, but is most suitable for warm water resort diving. A good quality, warm water regulator at a very good price.
If you require our improved version of the AT20 regulator which featured the UST 1st stage then please see the XTX20 regulator.    

First Stage

• No Swivel turret
• 4 medium pressure ports, 4 x 3/8" UNF
• 1 high pressure port, 1 x 7/16" UNF
• Polished silver chrome finish
• Balanced for good performance

Second Stage

• Pneumatically balanced system - reduces breathing effort
• Integrated Venturi Control
• Extremely efficient exhaust valve
• Compact integrated exhaust
• 25% lighter than TX models
• Comfo Bite mouthpiece - for comfort and to reduce jaw fatigue