How to Install a Soda Fountain

Step 3: Installing the Damn Tank

Take your double regulator (or primary regulator if you have two) to the local welding supply place when you get your CO2 tank. They should be able to give you the proper fittings and reducers to connect your regulator’s primary port to the tank itself. His local shop went so far as to connect & test it for him.

The wall behind the tank is a mirror, so don’t get confused 😉 Before putting the tank in its place, be sure to put two eye-bolts into the wall on either side of where the tank will sit. Then, use a small length of chain and some fastener hooks or clips. Secure the tank to the wall tight enough that, no matter how you tip it, its center of gravity will cause it to stand back upright. The idea is that if anything knocks or hits the tank, it won’t fall over and bust its tap, causing the tank to become a rocket (which is a very bad thing, and could cause injury/death.) If you need help with what is considered an appropriate fastening system, ask the welding people. As you can see in the picture below, that tank isn’t going anywhere.

A word on regulators; they pass the “primary” pressure, usually hundreds or thousands of psi, through their primary ports. They also “tap” that primary pressure to send a lower amount of pressure to their secondary ports.The gas exits the cylinder at way too high of a pressure; the regulator taps that high pressure to provide the lower pressure we need AND also passes the high pressure on to the other primary port. In a dual-regulator situation as shown in the picture (which is really just two regulators connected together with a threaded fitting), the high pressure gas (red) enters on the right-primary port of the first regulator. It is tapped to provide 100 psi to the carbonator feed (blue). BUT that high-pressure gas also simultaneously passes out the other primary port to the second regulator. That regulator taps the high-pressure feed to provide the syrup pumps with gas (55 psi). Finally, the high-pressure gas exits the primary port on the far left to hit the pressure gauge to give us a tank reading.

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If you are unclear as to how regulators work, TALK to the people at the welding supply place. Admit up front that you don’t know much about CO2 gas or regulators, and ask them for info. Also, look at your regulators. They will typically list on the back which are the primary and which are the secondary ports.

If you are going to setup a system with two single regulators, what you do is split the output of the first regulator with a brass T barb, then send one side to the carbonator, and the other to the second regulator, which steps the gas down yet again to the pressure needed by the syrup pumps. DO NOT use the primary pressure. The gas exiting the tank will burst the hose.The carbonator input pressure should be 95 to 100 PSI.

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For syrup kegs, the pressure should be about 30 PSI.

I have had conflicting reports about syrup pumps, however I looked at the system my local Pizza Hut was using and they run their syrup pumps at slightly less than 60 PSI, so that is the figure I am going to go with. Update: after getting my system working, I found that my pumps worked best at 55 psi. Whatever you do, look at the labels on the syrup pumps; they will list a maximum pressure. NEVER exceed this pressure.

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When you are ready, turn the screws (or handles) on your regulators to cut the pressure off completely (the regulator will have it printed on the unit which direction decreases the pressure). Once you have the regulators set to OFF, slowly turn on the CO2 cylinder’s main output. You should see the high pressure gauge show a reading of hundreds of psi. You can use a solution of soapy water to check for leaks. Or, turn the handle off again and let it sit overnight. If the regulators are truly shut off, the pressure gauge for the main tank should show the same reading in the morning as it did the day before. If it has moved visibly, then you have a small leak somewhere. This leak could drain your system of CO2 rather quickly over a period of days.

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When you connect your lower pressure gas lines, be sure to test those with soapy water as well. Nothing will be more annoying than getting everything setup and going and coming back the next day to find that all of your CO2 has leaked out.

Source: https://www.instructables.com/How-to-Install-a-soda-fountain/

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Hello, my name is ThienBao. I am a freelance developer specializing in various types of code.