Blue Diamond Product Documents
Keep your Blue Diamond ET-120 air pump running at peak performance with this genuine maintenance kit. Designed to fit all ET-120 model air pumps, the kit includes the replacement service parts needed to refresh your pump and restore reliable airflow to hydroponic reservoirs, aeration systems, and pond setups.
Blue Diamond recommends performing maintenance every 18 months, and routine servicing with this kit helps extend pump life, maintain consistent output, and avoid the unexpected downtime that stresses plants dependent on steady oxygenation. Servicing your own pump is a quick, economical alternative to replacement, keeping a proven workhorse in your system for years.