This is a BAC M/n J0909-B 22 S/n U065725601 This is a spray draft tower with Brass #22 nozzles. Even with monthly cleanings, including all three strainers, the nozzles clog with silt. Want to add a tower filtration system, anyone know of a source? Also how will it affect my warranty to drill into the tower to install a filter system? (tower is less than a year old) PS water treatment is good.