High pressure pumps such as those used for descaling or deep well injection can be severely damaged by suspended solids in the supply water. Refurbishing is a very expensive process. Very tight tolerances between moving parts allow these pumps to develop very high pressures. Grit, sand and other debris erodes surfaces, loosening tolerances and leading to inability to reach desired pressures. Orival filters used on the supply water to these pumps remove damaging sand and grit, protecting pumps and greatly increasing the time between rebuilds.