The QS-212 Sterilight UV quartz sleeve is used with the SQ-PA system. Minerals in your water will coat the quartz sleeve over time with use, this coating must we cleaned off to prevent a reduction in filtration performance. When the quartz sleeve can not be cleaned then it must be replaced. Specs End type: Open Ended ID: 0.79" or 20mm ± .2mm OD: 0.91" or 23mm ± .2mm Length: 10" or 254mm ± 3.5mm
