1) Flat, round seals 2) Laundromat appliances 3) Laundromat lineup 4) Leak preventers 5) Load-bearing things 6) Parts of faucets 7) Rings in joints 8) Seats for heads of bolts 9) Tap seals 10) They have loads of work to do 11) They might be next to nuts 1) Lavers 
Washers is British slang for copper coins.