The Float Valve Seals Effectively Under Very Low As Well As High Pressures Max 10 Bar. The Structure Of The Valve And Swirl Action Of The Water Reduces The Risk Of Blockage And Avoids Build Up Of Clogging Material Such As Sand Or Organic Material. Calcium Build Up Is Prevented. Durable Material. Metal Parts Are Made Out Of Stainless Steel 304. Plastic Parts Are Made Out Of Abs Plastic And The Seal Neoprene. In Case The Weighted Float Is Damaged The Valve Will Close And No Water Will Leak Out. The Valve Body And Seal Body Are Both Made From Abs Plastic And Screwed As Well As Glue Welded Together. No Tools Are Required For Adjustment.