Apex XTX50 and XTX40 - which first stage to choose?

[Centrals]

Thanks for that.

When you say that the DST is dry sealed turrent, do you mean that the 4 lp ports are not sealed?

In terms of environmental sealing to avoid contamination, do I need all ports sealed?

All the unused ports(H or L) are sealed with O-ring.
Environmental sealed is referred to:
Technical Information

 

[Cdncoldwater]

Thanks for that.

When you say that the DST is dry sealed turrent, do you mean that the 4 lp ports are not sealed?

In terms of environmental sealing to avoid contamination, do I need all ports sealed?

Your ports are sealed with either a hose, transmitter or a plug.

 

[buddhasummer]

 

[buddhasummer]

 

[buddhasummer]

Message me with your email address and I'll send you service manuals so you can see in details.

 

[buddhasummer]

 

[Centrals]

The 5th port is referred to the addition of an extra LP port to the top/bottom of the regulator(depend on orientation).
However, it is highly unlikely that anyone would put the 5th port facing upward so it is always pointing straight down.
You have to ask yourself if you prefer one of your LP hoses(primary or secondary) routing this way.
Primary: the hose attach to the 2nd stage which you breathing off.
Secondary: alternative air source.

DST or FSR(must have 2 HP ports)?
FSR.

UST is half the price(non-environmental sealed, not recommended for cold water ie below 10C).

If money is tight, UST or buy two and keep the other one as spare.

 

[Tiago Machado]

So let's if I got everything right:

FSR
Pros:
- Replaceable Head high pressure orifice
- 2 HP Ports
- Environmentally Sealed
Cons:
- No Turret
- Only 4 LP Ports - does it mean we can't connect a dry suit?

DST
Pros:
- Swivel Turret
- 2 HP ports
- 5th LP port option
- Environmentally Sealed
Cons:
- Not replaceable head high pressure orifice

DS4
Pros:
- Environmentally Sealed
Cons:
- No Turret
- Not replaceable head high pressure orifice
- No option for 5h LP Port
- One HP Port

UST
- Not environmentally sealed, turret, 2 HP ports

Is that it?

 

[grf88]

The DST is environmentally sealed.

 

[Tiago Machado]

The DST is environmentally sealed.

Corrected.