Sludge Gun application for line set cleaning/conversion from R-22 to R-410A animation Post author:Staff Post published:May 2, 2018 Post category:Inside Hydro-Balance Tags: line conversion, line-set, r-410A, retrofit You Might Also Like Easy Steps … Fresh Indoor Air April 15, 2021 Cleaning Roof AC Units April 15, 2021 Different Types of Coil Cleaners January 2, 1995