Product Review

Tune up kit for Aprilaire 4793 550 series humidifiers (part # 4793).  this tune-up kit Works for whole house small bypass humidifiers - models 550, 550a and 558. This kit contains everything you need to maintain your Aprilaire humidifier.  the kit includes: #10 water panel (qty) 4226 - feed tube assembly with 4184 nozzle (nozzle snaps into distribution Tray) 4231 - yellow orifice (comes nested in feed tube) 4004 - inline strainer (included in feed tube envelope) compression nut and ferule (included in feed tube envelope) 4217- scale control insert 4218- water distribution Tray 4184 - nozzle.