Repairing neoprene, replacing zips, cleaning O-rings and swapping straps. Cylinder: mandatory annual visual inspection and hydrostatic test every 2-5 years. NEVER disassemble regulators at home.
DIY underwater maintenance (Brico-Sub) reflects an active community that repairs and modifies its own equipment: replacing batteries in dive computers, repairing Tizip zippers, modifying compressors, 3D-printing parts, DIY adapters, and projects such as building self-propelled underwater scooters from scratch. Divers value the economic savings and the satisfaction of self-sufficiency, though the debate about safety is always present.
Tasks any diver can tackle include repairing neoprene tears with specific adhesive, replacing zippers with commercial kits, cleaning O-rings, and replacing fin and mask straps. Basic cylinder maintenance includes rinsing, mandatory annual visual inspection, and periodic hydrostatic retesting (generally every 2–5 years). Disassembly of regulator internals, BCD inflators with pressurized components, or cylinder valves should never be attempted at home.