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.

Specifications

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

Cold water compatible

Warm water use only

Balanced first stage

Swivel turret first stage

Forged first stage

Dry sealed first stage

Unsealed first stage

Number of first stage HP ports

Number of first stage MP ports

A clamp yoke version available

DIN version available

Removable seat in first stage

Angled first stage ports

Lightweight metal core first stage

Predominantly metal first stage

Left and right hand first stage

Digital display

Regular Apeks size second stage

Small micro size second stage

Neutrally buoyant second stage

Balanced second stage

Venturi control

Diver adjustable breathing resistance

Technician adjustable second stage

Wide exhaust as standard

Option to attach wide exhaust

Reversible second stage

Metal in front cover

Lightweight second stage

Re-usable mouthpiece clip

Nitrox M26 version available

Coloured regulators

Free foldable sports bag

Hose protectors

Comfort swivel hose connection

Lightweight ultraflexible hose

Hard wearing protective finish

Designed for twin set use

Suitable for twin set diving

Suitable for extreme diving

Recommended for technical diving

Recommended for extreme diving

Associated information...

Apeks Lightweight Flexible Hoses

Anti-Bacterial Mouthpiece

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