High pressure descaling pumps 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, thus loosening tolerances 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 increasing greatly the time between rebuilds.