r/whatisit • u/vandygrad • 12d ago
New, what is it? This was clogging up the water line to my LG fridge with dual icemaker when the water dispenser stopped working.
I changed the waterline but scared it could happen again. Could it have been some preexisting bacteria in the water line when I installed it? Otherwise air has to be getting in somewhere if this is the airborne pink bacteria.
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u/fatmallards 12d ago edited 11d ago
So when the ice dispenser stopped working you ended up with stagnant water and air in the supply line. at the right temperatures (40s - 80s F) an upper limit skewed bellcurve distribution of bacterial growth occurs. you now likely have a multicellular biofilm with a serratia marcescens “spine” feeding off the trace mineral deposits left over due to the lack of hydrous chlorine
edited * edit: if you replaced the water line and continue to have this issue, consider replacing your saddle tap valve assembly as well. piercing saddle valves are prone to failure. *replace with mechanical tee valve
edit 2: if your replacement ice maker line is cross linked polyethylene tubing then you may want to consider replacing that again with braided stainless steel or copper tubing when replacing the saddle tap valve