I had one at one time. It was capped on one end and the other end was a cap with an offset hole downward to a pipe connection. Pretty sure the black corrugated pipe fit right into it like a pvc pipe would had. Dirt on the pipe held it in place. If not, we used an adapter from the pvc fitting to black pipe. Worked well. I bought it at Lowes quite a while ago. Google shows me the NDS Spee-D and it looks exactly like what I bought.
