The Aqua-Pure APUV10 Ballast R is the correct replacement ballast for the following UV systems:
The Aqua-Pure APUV5 UV Replacement Ballast fits several ultraviolet filter systems from Aqua-Pure, including the APUV1, APUV2, APUV5, and APUV8 models. The APUV10 ballast delivers high performance with less heat, and does not require you to shut off your system because it handle power supply variances with ease. This Aqua-Pure ballast is a genuine OEM replacement part.
Aqua-Pure APUV5 UV Replacement Ballast specifications: