Pondmaster replacement ballast (transformer) for either the 20w stand-alone UV light or the Pressurized Filter 2000 gal.

FOR: 

• Submersible Ultraviolet Clarifiers (20 WATT SUBMERSIBLE ULTRAVIOLET CLARIFIER) (#02920)
• ProLine Pressurized Filter Systems (PUV-2000 w/ 20 Watt UV Clarifier) (#05025)