What is the past tense of rod?

'Rod" can be an action. "We have to rod this conduit to see if we can place a cable in it." So i guess you could say: "Did you rod the conduit?" or "We did rod the conduit."

I am not sure about saying it like this though. "The rod attempt for that conduit came back as blocked." I know where I work we just say we rodded the conduit even though "rodded" is not a real Word.