The 1211/1301 blend does not require a six year maintenance, hydrostatic testing, or recharging. The units should be visually inspected to ensure the extinguisher is fully charged and operable. Fullness is determined by weighing or "hefting" the unit. See name plate instructions for further details.
Dry chemical fire extinguishers tend to settle and "brick up" over time due to moisture and gravity, and this in turn sets up a dangerous situation whereby much of the powder-extinguishing agent is unable to be propelled from the cylinder.
H3R has hundreds of system cylinders of varying sizes in inventory, which is advantageous because it is often difficult to procure kits to rebuild your cylinders. At H3R, if you purchase the Halon, in many cases, we provide the cylinder at no charge.