The Trojan S330RL is the correct replacement UV lamp for the following systems:
The Trojan Sterilight S330RL Replacement Bulb - S2Q-PA fits several 3-4 gpm (gallon per minute) UV water disinfection units from Sterilight. This Sterilight UV bulb has a life of 9000 hours and features germicidal properties that kill germs and viruses. This S2Q-PA UV light replacement has a green bulb base and ceramic cap.
Trojan Sterilight S330RL Replacement Bulb - S2Q-PA specifications: