This well pressure tank is perfect for boosting well water in harsh environments -60 to 60 . It prevents negative pressure under vacuum and automatically stops when water is full. Suitable for campus agricultural & industrial water. Specification: material: stainless steel product model: 250l product size: 50x135cm 19.7X53.1In applicable to: schools factories households irrigation packing list: stainless steel pressure tank*1pcs pressure button*1pcs pressure gauge*1pcs safe valve*1pcs 2-in-1 air replenishment check valve*1pcs sewage outlet elbow*1pcs raw material belt*2pcs water outlet joint*1pcs outlet ball valve*1pcs drain outlet ball valve*1pcs note: due to different lighting and screen settings the item color may be slightly different from the picture. Due to different manual measurements please allow a 1-2cm difference in size.