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[[<gallery>File:4.5bblpropup3.jpg|300px]]Diagram of the propagator. Below you File:4.5bblpropup2.jpg|You can see the 4 way SS T valve at the top of the fermenter allowing for a blow off tube, sterile transferring of yeast(the yeast has to be in a container with a tri-clover valve for this), and the hose coming from the kettle: [[File:4.5bblpropup25bblpropup.jpg|300px]] Below is the The valve set up. The top valve has the whirlpool connect, the middle has the diffusion stone behind the valve, and the bottom has an elbow with a valve: [[File:4.5bblpropup.jpg|300px]]</gallery>
converted "Justin Amaral's 4.5 BBL Propagator" to a gallery for faster loading times
Below is the draw up of the build out for this prop up tank. As you can see it uses quick disconnects but you can use tri-clover connects as well. It also uses a diffusion stone that connects into one of the ferrules allowing you to trickle in gases. The picture shows a diffusion stone directly into the fermenter but its since been adapted as shown in the other pictures below to allow the diffusion stone to be behind a valve so its only exposed when needed. It also uses a whirlpool connector that goes into the fermenter creating the whirlpool when the pump is on:
==Techniques==