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Single Stage Regulator with Adjustable Pressure

Know Your Regulator

Single Stage CO2 Regulator layout
A: Mains cable.
B: Needle valve adjuster; varies the CO2 dose. Turn anticlockwise to increase flow, clockwise to decrease flow.
C: Needle valve output (push-fit).
D: Solenoid valve. Plug into a timer plug or pH controller to only dose CO2 at specified times and durations.
E: Working output pressure gauge.
F: Cylinder pressure gauge.
G: Pressure adjuster knob (clockwise increase pressure, anticlockwise decrease pressure).
H: Nut: must be tightened using wrench / spanner.

Video


Step-by-Step

Tighten dual stage regulator to CO2 cylinder
Step 1) Tighten the regulator to your CO2 cylinder using a spanner or wrench. Do not hold the regulator while tightening; allow it to freely rotate. If you hold the regulator while tightening the nut, then the friction between the nut and the stem can cause the stem to turn anticlockwise and unscrew from the main body of the regulator, which will result in a leak.
Set output pressure of dual stage regulator
Step 2) Set the output pressure to minimum by turning the pressure adjuster knob fully anticlockwise.
Open Pisco needle valve flow controller
Step 3) Close the needle valve by turning fully clockwise.
Switch CO2 solenoid on
Step 4) Plug the solenoid into a mains socket and switch on.
Open flow of gas from CO2 cylinder
Step 5) Open the flow of gas from your CO2 cylinder.
Pressure gauge showing cylinder pressure
Step 6) The cylinder presure gauge (A) will now indicate the pressure of the cylinder. Turn the pressure adjuster clockwise until the output pressure gauge (B) reads 40PSI, which is a good starting point for a single diffuser installation.
Close Pisco valve flow controller
Step 7) With the bubble counter attached, turn the needle valve anticlockwise to achieve the desired bubble rate. 1 bubble per second is suitable for a 150L aquarium - adjust your dosing in accordance to this, i.e. 2 bubbles per second for 300L aquarium.


Removing Tubing or Bubble Counter from the Pisco Valve

Removing pisco valve If you need to remove the bubble counter / tubing from the Pisco valve use an object (scissors blade in this case) to press down on the collar of the Pisco valve, while at the same time gently pulling the bubble counter / tubing away out of the valve.

Check for Leaks

It is recommend that each time you reconnect the regulator to the CO2 supply that you check for leaks. Identifying a leak from the outset is a much more desirable result than discovering there is a leak only when a substantial amount (or all) of your CO2 cylinder has leaked.

The easiest way to check for leaks is to cover all of the joins with soap suds, and look for any sign of bubbling, and also listen for a 'hissing' sound. If your regulator has a solenoid it is recommend you switch the electricity supply off prior to applying soap suds. Please also try to only use the soap suds themselves, and as little water as possible.

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