9 kg LPG Gas Cylinder / Bottle Grey

Mounting & installation 

• Caravan Gas Bottle
  Must be mounted in a dedicated LPG locker or external draw bar, vented to outside, and installed by a licensed gas fitter (or at least meet caravan/RV furniture & gas installation standards).

• Hardware Gas Bottle 
  Often just a swap/exchange bottle or smaller cylinder for BBQ/camping. Generally used upright in open outdoor settings, possibly less stringent mounting.

Bottle type & size 

• Caravan Gas Bottle
  Can include larger capacity (e.g., 9 kg, 4 kg) and sometimes “Grade 2” cylinders for caravan use, or specialised composite bottles to reduce weight.  
  
  
• Hardware Gas Bottle 
  Typically, smaller/kits for BBQ or camping, e.g., 4 kg, 8.5 kg exchange bottles from Bunnings.  

 Valve/fitting type

• Caravan Gas Bottle
  Often uses regulator, pigtail hose, correct fittings for caravan installation (e.g., 3/8″ SAE or 3/8″ BSP LH depending). Must meet RV/camper regulations.
• Hardware Gas Bottle 
  The swap bottles may use standard valve types like LCC27 or bayonet style typical for domestic BBQ/portable use.

 Use‐case / appliance load 

• Caravan Gas Bottle
  Designed to supply multiple appliances (fridge, water heater, cooktop) while travelling. Must be secure to road-vibration, etc.
• Hardware Gas Bottle 
  Often just for a BBQ or camping stove, lighter duty, maybe less robust mounting/installation required.

 Safety & compliance

•  Caravan Gas Bottle
  Because movement, vibration, mounting on vehicle/trailer, must comply with vehicle & gas installation regulations (venting, mounting, securing etc). 
• Hardware Gas Bottle 
  While still needing to be safe, perhaps less complex mounting, more straightforward domestic use.

 Exchange/ownership model 

• Caravan Gas Bottle
  With caravans you might own the cylinder and refill it (or exchange), but you must ensure correct grade, mounting, etc.
• Hardware Gas Bottle 
  With Hardware “Swap’n’Go” type you often exchange the bottle for a refill; you might not own the cylinder long-term.

 Cost & convenience 

• Caravan Gas Bottle
  Installation/fit-out may cost more due to mounting, regulators, hose, securing, venting.
• Hardware Gas Bottle 
  More convenient for casual usage, widely available via retail stores, cheaper install upfront.

 Colour

• Caravan Gas Bottle
  Grey In Colour – Aesthetically blends in with modern Caravans. 
• Hardware Gas Bottle 
  Cream – Not Appealing on modern caravans.

A "grade 2 gas bottle" refers to a gas cylinder with a durable, higher-quality coating designed for extended use, particularly in demanding environments like commercial or marine applications. The "Grade 2" designation describes the surface finish, which is typically achieved by abrasive blasting, a base coat, and a zinc-rich topcoat for superior corrosion resistance. These are distinct from the standard "Grade 4" or domestic cylinders, offering greater longevity.