Hydroponic Water Chiller Fittings & Parts
Water chiller fittings, parts, and accessories cover the connections, control components, and service items needed to install, maintain, and extend hydroponic and process cooling chiller systems. This collection includes complete chiller units from EcoPlus and Active Aqua alongside recirculating chiller systems from Across International, plus DIY cold plunge starter kits that pair a chiller unit with a pump kit for cold water therapy applications. Replacement fittings, temperature probes, and control units are available for ongoing chiller maintenance without full unit replacement.
EcoPlus and Active Aqua Chiller Parts
EcoPlus and Active Aqua produce the most widely used hydroponic water chillers in the hobby and small-commercial grow market. The EcoPlus Commercial Chiller Electronic Control Unit (ETL listed) is the primary replacement control component for EcoPlus chiller systems -- a direct service part for units that have experienced control board failure. Active Aqua DIY Cold Plunge starter kits include the chiller, pump, and fittings needed to build a cold plunge setup. For replacement hose barbs, quick-connect fittings, and temperature probes for existing chiller units, check the individual listings for compatibility with your specific chiller model.
Across International Recirculating Chillers
Across International produces recirculating chillers for process cooling applications in laboratory and extraction environments -- different from hydroponic reservoir chillers in that they are designed for closed-loop process cooling rather than open reservoir temperature management. Available in capacities from 17L through 35L at temperature ranges from -10 degrees C to 25 degrees C. Browse all water chillers or see water pumps for compatible circulation. Expert support at 888-815-9763. Fast shipping.
Water Chiller Fittings & Parts FAQ
When does a hydroponic water chiller need replacement parts?
Hydroponic water chillers most commonly need service for three issues: hose fitting failures (barb fittings crack or develop leaks from repeated connection cycling or UV exposure), temperature probe replacement (probes can fail causing the control unit to display incorrect temperatures or run continuously), and control board/thermostat failure (most often after electrical surge events). For chiller units outside of warranty, replacement control units and temperature probes are more cost-effective than full unit replacement if the compressor and refrigeration circuit are functioning normally. Contact 888-815-9763 for help identifying the right replacement part for your specific chiller model.
What water temperature should a hydroponic chiller maintain?
Most hydroponic crops grow optimally with reservoir or irrigation water temperature between 65-72 degrees F (18-22 degrees C). Above 75 degrees F, dissolved oxygen in the water decreases significantly and beneficial microorganism populations that help prevent root disease become less active. Root pathogens like Pythium thrive in warm water above 72 degrees F. In warm growing environments where reservoir temperature rises above this range, a chiller maintaining 65-68 degrees F reservoir temperature prevents the conditions that lead to root zone health problems. Monitor actual reservoir temperature with a thermometer rather than relying on ambient room temperature as a proxy.
What size chiller do I need for my hydroponic reservoir?
Chiller sizing is typically expressed in BTU/hour or HP (horsepower) and must match both the reservoir volume and the ambient temperature differential. A general guideline: 1/10 HP handles approximately 25-50 gallons in a well-insulated environment; 1/4 HP handles 50-100 gallons; 1/2 HP handles 100-200 gallons. The larger the temperature differential between ambient room temperature and your target water temperature, the more cooling capacity you need. In hot environments (above 85 degrees F ambient) or large reservoirs, size up from the minimum recommendation. Use our cultivation support team at 888-815-9763 for specific sizing guidance for your setup.
