As in chemical siphon? If that's what you're referring to, it's pretty simple to do. Look on the 'pictures' page of my website, top right hand corner. You'll see the water coming into the machine, it then goes to the water box. Between the water box and the pump there is a gate valve inline. You'll see the blue handle sticking out the left hand side of the machine. After that gate valve is where a T is for your chemical jug line. What you're doing is slightly cutting off the flow of water to the pump from the water box and forcing the pump to draw water elsewhere. In this case, it's drawing solution from your solution jug. You can get a gate valve and T at any hardware store.