The Cougars remain undefeated against American Athletic Conference competition after they overcame late fourth and fifth set deficits against the Pirates on Friday night at the Fertitta Center.
ECU was able to build an early lead to begin the match against Houston as they scored the first three points of the set.
The Cougars answered the strong start from the Pirates by knotting the score up at three but soon found themselves down by as many as seven points.
The Pirates outlasted the Cougars as they held on for the 25-21 set win.
Houston struggled with errors all game long.