Large enough volume that when used with a Reverse Osmosis system you can turn it on and off based on water flowing or not without losing any disinfecting qualities. Instead of running it 24 hours a day.

Need to return . My plumber had me buy it by accident I do not need it I have left voicemail messages but no one returns my calls please call me so I can return it 707-513-7945. Thank you

The instructions are not very good. With some thinking, it can be properly installed.

package arrived well wrapped, all pieces were included but their were no instructions or owners manual. Watched you tube for information to install. Plugged it in all was fine until the ballast light started flashing red and the bulb was off after about 20 minutes. Tried the second ballast include and it did the same. unplugged for a while and retried.Bulb came on but did not last.