Quartz Sleeve for SITA UV 400 Series, Domed End, article 3897-0621. Fits: SITA 400 series. The quartz sleeve isolates the lamp from the water and passes the germicidal UV into the chamber. It fouls with hardness, iron and manganese deposits and is cleaned or replaced when the UV intensity reading cannot be recovered. Check overall length, outside diameter and whether one end is domed (closed) before ordering, and replace the sealing O-rings whenever the sleeve is removed. SITA HDPE series data: high-density polyethylene chamber for seawater and corrosive liquids, 1-980 m3/h, low-pressure high-efficiency or amalgam lamps with 9,000-16,000 h lamp life, 6 bar. Spare part for UV disinfection systems of S.I.T.A. srl, Genoa, Italy, which builds low-pressure, amalgam and medium-pressure UV units for drinking water, food and beverage, aquaculture, swimming pool, marine and wastewater duty (series AL, LCD / Rack LCD, AM, IT, 440, HDPE, SBT, SMP, SSD, TOC, GR and Pool).