Please Note: This is a new DC transformer. These should not be used to replace your AC black transformers (part 46038) as it is incompatible with the old AC parts. Please check your manual if you’re unsure of your setup, or call us for advice.The air pump on your biOrb works very hard, 24 hours a day and like all mechanical parts will eventually wear out. You may notice that the pump becomes noisier or the bubbles less vigorous. At which point it may be time to replace your air pump. Replacing the air pump is simply a case of unplugging the old one and plugging in the new. Simple instructions are supplied. If your air pump stops working replace it as soon as you can to minimise interruption to the filtration. It is advisable to keep a spare air pump so that if it fails you can replace it straight away.Suitable for all DC run biOrbs running the power supply ‘biOrb 12 V DC Power Supply’ (part number 73114)Will not work with original biOrb AC Transformer (part number 46038)