Warning. Everything that you read here about the rebreather is my personal opinion!General infoFXccr is a chestmount close circuit rebreather produced by Iqsub, Czech Republic. CE certified. FXccr is great for traveling, recreational, and light technical and cave diving. For deep diving, it is a great oxygen rebreather for a deco stage, especially if you have a habitat (I normally use it for this purpose for my diving). It is very comfortable to sit in the bell and breath through the rebreather. The rebreather has BOV. To do gas breaks or to switch to OC bailout you just need to turn the valve.The depth range technically is unlimited and it is the same reliable machine as its sidemount Flex and backmount Xccr brothers. The body of the rebreather is from delrin, a "bag" is from cordura. It is robust and very light. I am an instructor of FXccr and a certified technician for Portugal and Spain. 

The size and the weight The height of the rebreather is 30 cm. The length is 34 cm, the width is 15 cm. It is very small and convenient for diving, carrying in a cave and travelling. The weight of the rebreather in travelling condition without a tank and sofnolime is around 10kg, the machine is ready to dive with 2L steel tank and scrubber 2.2 kg with sofnolime weights 16 kg only! That’s amazing! 

The breathing hoses and connectorsThe connectors of the breathing tubes are patented by Iqsub. Their feature is you are not able to make a mistake and connect a hose to the wrong connection and to connect the hoses (or counterlungs). You need to make just one turn and after a click, it is held with 100% guarantee that even with rotation of the hoses they can not be disconnected by itself. The white button blocks the rotation till you manually with your finger press it. The breathing hoses are made from rubber. You can change them to any other hoses, for example, to Cooper hoses.

The BOVThe BOV has a handle to switch your breath from bailout tank to the closed circuit. The handle goes as the clock goes in parallel with your face. There is a HUD connector on the BOV with an adjustable position of the HUD. 

The counterlungsTo imagine the size of the counterlungs from practice - you need around one and a half exhales to empty them. It is more than enough to always have enough volume of gas. With the full of gas counterlungs the machine with a 2L steel oxygen tank swimming on the surface. It is very comfortable. The rebreather swims around you during the time when you put all another gear on yourself. The counterlungs have a water trap which prevents the water goes to the canister.The exhale counterlung has an adjustable dump valve which releases the redundant gas automatically.

Mccr and eCCR
FXccr is eCCR. I have not heard that someone installed a needle valve for the rebreather to convert it to mccr, but it is easy to do. IQsub produces a very nice needle valve inserted in the MAV O2. The needle valve always gives you a constant mass flow of around 1L of O2 per minute.

The head and electronicsFXccr has Shearwater electronics. There are two independent motherboards in the head. One is for shearwater controller (computer) Petrel 3 and another one is for HUD (display). It is like two heads in one head. They get the data independently from three cells and provide you the data about ppO2. The controller counts Deco time. The reliability of Shearwater is top. It is proved by mass production with thousands of computers per year. 

The canister and scrubberThe scrubber has a volume for 2.2 kg of sofnolime. Many rebs have the same capacity, as an example JJ and SF2. The canister has a water trap.

MAVs, Gas connection.There are two MAVs. For Oxygen and Diluent. You can connect any gas to the rebreather before or during your dive. Most of the divers use a 2L oxygen bottle on the body of the rebreather.If you need you can use only off-board gas connected through any type of the connectors through MAVs of the rebreather. Normally it is not a problem in most touristic places to find and rent any type of 2L bottle for O2 with any type of the valve, but if you have difficulties with it, no problem, dive with off-board oxygen. This flexibility with gas supplies is very comfortable. From the factory, you have QC6 connector on the MAV for diluent, but without any problem, you can add one more connector QC6 or 4, or any other one on the MAV for oxygen supply. It is more comfortable and versatile in carrying the stuff to the water in a cave. 

ADVADV has the same appearance as the second stage of the Apeks reg. The same simplicity and reliability. It the very easy to a just and make the service. From the factory, the ADV is adjusted for the quite soft work which is the best for fast descending. You never have a lack of diluent when you go down. When you go up sometimes it is good to use a shut-off valve to prevent injecting diluent when you are in deco stops and even 0.5 m down can drop your ppO2 because the ADV gives you a portion of the gas. You can easily readjust the ADV and make it work with less sensitivity. No problem.

TravelingIt is very comfortable to carry FXccr in a regular suitcase. Just put it assembled and fly to your diving destination. It is safe. Also, you can disassemble the rebreather on the parts and put them separately. The transportation weight is around 10 kg. The weight of the rebreather which is ready to dive with 2.2 kg of sofnolime is around 16 kg with a 2L steel tank.

WashingYou can easily disconnect the counterlungs, the breathing hoses, and BOW and wash and dry everything separately. To disassemble everything takes 5 minutes. There are holders for the counterlungs to hang them and dry quickly.

Download manual for Flex2, click here

FXccr chestmount, passing the restriction in nomount:

FXccr on a depth of 92 meters. FXccr, the dpv and the drysuit are mine on my student, that is why you see “Anton” everywhere: