Configuration of a Stage
Here you can find a description how to configurate a stage (tank and regulator) and how to correctly mark it. For stagebottles only aluminium bottles are used, because they are nearly neutral in the water and easier to balance. Most common are sizes like 80 cuft or 40 cuft, but 7 liters, 10 liters or 12 liters are used as well. Like common at DIR configuration it is important not to use metal to metal connections which can´t be undone underwater to mount your stage.
Stage rigging kit (shopping list)
First you take the cord double. At the upper end you fix the first boltsnap with a simple knot (half hitch). The knot should hold the boltsnap about the beginning of the shoulder of the bottle. After that you slide the hosepipe on the cord.
At the end of the hosepipe you make another knot (half hitch). Then you put the second boltsnap on the cord and fix the ends of the cord with a clove hitch. The space between the clove hitch and the half hitch should be as wide as the hoseclamp. The ends of the cord are melted together to avoid loosening.
Overall length of the ready assembled rigging kit is about 55 cm for a 40 cuft bottle and about 58 cm for an 80 cuft.
If that´s too much work for you, you can buy it as a ready set at your local DIR dealer.
At last you fix the rigging kit at the bottle. You put the loop around the valve at the bottle neck, tighten it downwards and fix it with the hoseclamp
Make sure to lide the long and short tubical webbing on the hoseclamp before closing it. The first piece of inner tubing is slided over the rigging kit. The second one is below the hoseclamp as redundancy.
Every stage is marked with the initials of the diver and the MOD (maximum operation depth) of the gas. The markings are in a position for the divepartner to read and check the MOD.
Best to use for the markings is acrylic laquer. The patterns can be bought at your local hardware store.
The stage regulator is equipped with a lp hose of about 100 cm length. The gauge has a 15 cm hp hose and is held in position with cave line (see picture).