The early Boeing 707-120 and Douglas DC8-10 (and USAF B52s and KC-135s) with P&W JT3C turbojets also had the feature, and were collectively known as "Water Wagons". Usage generated smoke far denser than anything from a Trident or One-Eleven.
Boeing 707-123 - American Airlines | Aviation Photo #0541868 | Airliners.net