This British Standard specifies requirements for galvanized mild steel cisterns (in two grades, A and B), cistern covers, tanks (in two grades, A and B) and cylinders (in three grades, A, B and C). The capacities made are from 18 litres to 3364 litres in the cistern range, from 95 litres to 155 litres in the tank range and from 73 litres to 441 litres in the cylinder range.