The D⁵™ version C(ompact)

Description

This page provides contruction details of the "Mark 3" version of the D⁵™ sidemount rebreather.

Details

* Mouthpiece
* Counterlung
* Scrubber
* Gas Feed
* Assembly

Mouthpiece

Shown here is the mouthpiece made by Forest Wilson as a copy of the original Fred Badier version. It is largely made out of PVC pipe. The hoses attach to the chassis of the rebreather via a 22 mm adapters which screw into the PolyPlumb connectors.

Counterlung

The counterlung is a simple 4 l Ortlieb water bag with two P-ports for oxygen meters.

This sits inside a rigid case with clips to hold the inlet and outlet pipes to the scubber/counterlung.

Scrubber

View down into the empty scrubber - a scrim covers the perforated distribution plate.

The scrubber is filled from the base with the cap of the sodalime container acting as a convenient cover for the dip tube to prevent it filling with sorbant.

View of filled scubber with green scrim covering sorbant bed and springloaded perforated distribution plate held on by pin through collar over the dip tube.

Gas Feed

The gas feed is a simple metering valve plus bypass for the oxygen and a manual diluent addition. Braided hose carries the gas to a 22 mm plug which sits in a T-piece on the inlet side of the scubber. This ensures that mixing of gases occurs in the stack before reaching the mouthpiece.

Assembly

This shows the general arrangement of the inlet (T-piece with flexible hose) and outlet (T-piece with collar to attach to counterlung and rigid upstand) to the scubber.

The chassis of the assembled rebreather with the attached gas feed and scubber enclosed in the counterlung case. The open ports may be capped for transport. The port with the counterlung shows the spiral wrap used as an anti-collapse feature in the counterlung.

All assembled without ppO₂ meters, off-board diluent and O₂ supplies.