The All Pond Solutions 36w SSUV clarifier utilizes an efficient stainless steel build that is up to 30% more effective than comparable plastic products and its reflective body increases the effectiveness of UVC clarification by 50% or more. This new stainless steel design is extra tough and durable to make for long-lasting use and crystal clear pond water. With many improvements over other models, the SSUV stainless steel pond steriliser has a built-in advanced thermal protection feature, which automatically shuts the unit down if in danger of overheating. Once the unit has cooled down to normal temperature it will restart and continue to operate.* Designed for large ponds the SSUV includes a one in / one out system for water delivery and exit. Included is an array of attachments to fit either flexible hose or BSP pipe fittings. The UV clarifier also has a transparent panel enabling you to check that the UV is fully operational at all times. Accessing the quartz sleeve for maintenance and replacement is made easy. Simply turn the ballast counter-clockwise and gently pull the ballast apart from the UV case. IMPORTANT: Before opening up SSUV unit, ensure the system is off at the mains and you turn off the power to your pump / external filter. UV bulbs and quartz sleeves are very fragile - handle with care. Each unit comes with a 2-year warranty for extra peace of mind.