I live in a condo building on the top (6th) floor. I would like to improve the water pressure in my showers. I am nit using any fancy exponent like body sprays etc. I only have shower heads with hand held shower. The pressure is somewhat low, I though it would change with replacing the shower heads but it didn’t. The plumber who installed fixtures recommended to instal the water pressure pump. Could anyone suggest from your own experience what is the good one and will work in the 3 bedroom place, I have 2 bathrooms one of which has a shower with 2 separate heads never used at the same time.