Below is the downloadable Double Diaphragm curve. The Double Diaphragm water pump is a rugged, mobile wellpoint trash pump and an ideal dewatering solution for any contractor looking to get the job done quickly and efficiently. These incredibly versatile diaphragm water pumps are useful in numerous applications, including operations that deal with slurries, mud, sewage, and other thick liquids. Their construction offers the greatest value, durability, reliability, and service life in the industry. Please note – All curves shown are water horsepower curves. Consult MWI for details.