A work vehicle comprising: a commodity source ; a delivery system configured to receive a commodity from the commodity source and distribute the commodity substantially vertically downward between a plurality of delivery runs , the delivery system including at least one commodity manifold that includes: a first run structure with a first run passage ; a second run structure with a second run passage ; and a manifold regulator with a body having a first end and a second end and being rotatable about a substantially vertical rotation axis between a first position and a second position, the body at least partly defining a channel configured to receive and distribute the commodity, the channel having an inlet and an outlet and extending continuously through the body from the first end to the second end along a channel axis that is substantially straight, the inlet in communication with the commodity source in the first position and the second position, the outlet in communication with the first run passage and disconnected from the second run passage in the first position, the outlet in communication with the second run passage and disconnected from the first run passage in the second position. a commodity source ; a delivery system configured to receive a commodity from the commodity source and distribute the commodity substantially vertically downward between a plurality of delivery runs , the delivery system including at least one commodity manifold that includes: a first run structure with a first run passage ; a second run structure with a second run passage ; and a manifold regulator with a body having a first end and a second end and being rotatable about a substantially vertical rotation axis between a first position and a second position, the body at least partly defining a channel configured to receive and distribute the commodity, the channel having an inlet and an outlet and extending continuously through the body from the first end to the second end along a channel axis that is substantially straight, the inlet in communication with the commodity source in the first position and the second position, the outlet in communication with the first run passage and disconnected from the second run passage in the first position, the outlet in communication with the second run passage and disconnected from the first run passage in the second position. a first run structure with a first run passage ; a second run structure with a second run passage ; and a manifold regulator with a body having a first end and a second end and being rotatable about a substantially vertical rotation axis between a first position and a second position, the body at least partly defining a channel configured to receive and distribute the commodity, the channel having an inlet and an outlet and extending continuously through the body from the first end to the second end along a channel axis that is substantially straight, the inlet in communication with the commodity source in the first position and the second position, the outlet in communication with the first run passage and disconnected from the second run passage in the first position, the outlet in communication with the second run passage and disconnected from the first run passage in the second position. <EOS>