The Trojan S463RL is the correct replacement UV lamp for the following systems:
The Trojan Sterilight S463RL Replacement Bulb - S5Q-PA is a replacement UV lamp for several Sterilight UV filtration systems, including 6 gpm units. This Sterilight UV bulb features a lamp life of 9000 hours and is specially constructed with germicidal technology that help kill germs and viruses. This S2Q-PA UV light replacement has a green bulb base and ceramic cap.
Trojan Sterilight S463RL Replacement Bulb - S5Q-PA specifications: