Pondmaster replacement ballast (transformer) for either the 10w stand-alone UV light or the Pressurized Filter 1000 gal. 

FOR: 

• Submersible Ultraviolet Clarifiers (10 WATT SUBMERSIBLE ULTRAVIOLET CLARIFIER) (#02910)
• ProLine Pressurized Filter Systems (PUV-1000 w/ 10 Watt UV Clarifier) (#05015)