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Service wash covers for cleaning split and cassette AC indoor units — they catch dirty water and condensate during coil cleaning and drain it via a hose into a bucket. For HVAC/R installers and service techs doing maintenance without dismounting the unit.
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An AC wash cover is a waterproof apron (typically PVC or coated polyester) fitted under a wall-mounted split unit or onto a ceiling cassette. While you clean the evaporator coil with a pressure sprayer or chemical foam, the cover traps the contaminated water, dust and mould and channels it through a drain spout and hose into a container. It lets you service the unit in place, without taking it off the wall or flooding the customer's room.
Choose by working width (typically 700–1100 mm for wall splits) against the length of the unit casing, and by mounting type — separate versions exist for wall units, ceiling cassettes (600×600 / 840×840 mm) and floor-standing units. Check the fixing method (elastic, drawstring, hook-and-loop, clamps), the drain spout diameter for a standard 1"–1.5" hose, the material thickness and weight (resistance to cleaning chemicals and UV for outdoor work), and whether the kit includes a drain hose and bucket.