The submerged pump housing and stainless steel rotor used to pump water and / or sewage feature durability and better performance than bo

Submersible pumps with stainless steel casing and impeller used to pump water and/or sewage have better durability and performance than cast iron pumps.. However, the cost of stainless steel pumps is twice that of cast iron pumps. What's up, what is your choice: pay more once or have to pay several times with maintenance problems? //////// Submersible pumps with stainless steel casing and rotor used to pump water and / or sewage have a better durability and performance than cast iron pumps. Meanwhile, the cost of stainless steel pumps is twice as much as cast-iron pumps. so, what’s your choice: paying more once or having to pay several times for maintenance problems?