Cylinders are filled on site at our premises in Clyde Street and can generally be filled with air (21% O2) and Nitrox 32% while you wait.
AIR is $10.00 per fill or buy a concession card of 10 fills for $75 during October and November - Normally $85.
(save $35, that's 3.3 fills for free for October and November!!!).
Enriched Air Nitrox fills for Enriched Air Nitrox certified divers.
Enriched Air Nitrox to 32% is $16 per fill or buy an EANx concession card of 10 for $150.
Enriched Air Nitrox to 40% is $18 per fill.
We are able to offer a quicker turnaround time for our Nitrox customers than in the past with our brand new dedicated compressor. Our qualified Gas Blender must be on site.
We are also in the process of trialing our Oxygen Booster system for O2 clean partial pressure filling.
O2 is $0.03 per Litre plus a $5 fill charge for Partial Pressure Blending.
Pure Air: Our air is tested quarterly by NZUA, a third party EPA sanctioned test body in line with the Worksafe regulations to ensure we comply and supply you with air safe for breathing underwater. Our compressor's air filtration systems exceed the minimum requirements, giving you air that you can trust and ensure we help your cylinders last for years.
Scuba cylinders and valves each have a working pressure, we have to fill to the lowest of these pressures. In New Zealand all our cylinders have to have a LAB number or an ISO number, our valves need a burst disc. This means overseas cylinders usually cannot be used.
We do prefer you give us more time to fill your cylinders as the process creates heat. If you give us an hour or so, the gas in your cylinder can cool down, so when you come to collect it, we can top it up to the cylinders and valves working pressure rating.
Why does this happen? As gas is transfered into your cylinder, the gas molecules are moving around quite fast and create friction as they bounce off of each other and the internal walls of the cylinder, this creates heat and therefore a higher pressure. Allow the gas in your cylinder to sit for an hour and the molecules slow down and cool down, the result is a drop in pressure in your cylinder. So a tank filled to 207 bar may drop to about 180 bar after an hour or so.
Now you go for a dive and the water is colder than the air temperature, the pressure in the cylinder will drop even more before you even breathe it. So your 207 bar at 20 degrees C may drop to 190 bar in 18 degrees C water.
Please note that any tank that is completely empty will have to be opened and inspected at the owner's cost before filling for safety reasons. There is a labour charge of $5 for this.