Used Tunze 5000.02 replacement metering pump for Tunze Osmolator. Low-voltage 3–12V DC pump, used only for a short period and in good condition. The Tunze 5000.02 Replacement Metering Pump is a genuine replacement pump designed for use with the Tunze Osmolator automatic top-off system. Operating on a low-voltage 3–12V DC supply, it delivers reliable water transfer to help maintain stable water levels in your aquarium. This listing is for the replacement metering pump only and is ideal for replacing a worn or faulty pump without purchasing a complete Osmolator unit. The pump has been used for only a short period and remains in good working condition. Key Features Genuine Tunze replacement metering pump Designed for the Tunze Osmolator system Model: 5000.02 Operates on 3–12V DC low-voltage power Suitable for use with 4mm hose Maximum head height of 3.6 metres Used for a short period and in good working condition Replacement pump only – Osmolator unit not included This replacement pump offers a straightforward way to restore the performance of your Tunze Osmolator, providing dependable operation for automatic top-off systems. Specifications Brand: Tunze Model: 5000.02 Power supply: 3–12V DC Compatible hose size: 4mm Flow rate: 100 l/h at 0.9m head 80 l/h at 1.4m head 58 l/h at 1.9m head Maximum head height: 3.6 metres Condition: Used for a short period, fully working Includes: Replacement metering pump only (Osmolator not included)