Evie, they make the poly pipe in the same size as the bulk soaker hose along with the fittings. To turn certain areas off you can get an inline shut off valve. I would go with the .700 as that is the most common size in the irrigation world. I can give you a link if you would like to email me.

Thank you for responding to my post. The areas I would like to control would be in line, so I was just wondering if I could effectively supress the flow of water by preventing it from escaping the hose. For instance, I have 3 raised beds with walkways between them. That two feet of walkway between beds gets watered, which is a waste. Right now I'm using old pool railing as diverters, so the water goes into the bed.

You use .700 soaker hose, .700 polypipe and .700 fittings. You put the polypipe in the areas that you don't want water. Polypipe is solid flexable tubing used inbetween the soakerhose. It is the same size as the soakerhose, therefore fits in the fittings that the soakerhose fits in.