In selecting equipment for a planned dive, the technical diver’s first concern will be his supply of breathing gas, based upon the requirements for a particular dive, as well as a suitable reserve for contingencies. Technical diving may involve extended bottom times, perhaps at relatively deep depths, with additional time spent underwater during mandatory decompression stops. Sometimes a diver will be able to meet his gas supply requirements with a single high-capacity cylinder, though more frequently he/she will opt for double cylinders. In addition to volume, double cylinders offer an advantage to the technical diver in terms of redundancy. (TDI)
Assembling your own scuba gear can be a very rewarding and satisfying experience, but it is important to remember that there is no substitute for a trained professional. Until you are very familiar with the process, it may be wise to seek the assistance of one when assembling your double cylinder setup.
Step 1: Making sure you have the correct materials
- 2x Matching Cylinders
- Tank Bands (appropriate for cylinder diameter)
- Isolation Manifold Crossbar
- Left & Right handed Valves
- A wrench / socket kit
- Bolt Kit
- Tape Measure
- Backplate, Harness, and Wing
Step 2: Preparing Your Scuba Cylinders
If the scuba cylinders you will be using aren’t new, you may need to do a few things to prepare them before moving forward. If your cylinders already have valves on them, they will need to be opened to ensure the cylinders are free of compressed gas and then removed. If there are any stickers that may lie between the bands and the cylinder, they must be removed as well. Be certain that your cylinders have been appropriately inspected by a certified professional and have a current hydrostatic test before moving forward. Be certain they are idential, not just in size and shape, but in weight as well.