Really? If the 2 halves of the shower head are separated to clean and the large 8" o-ring is stretched and will no longer seal the 2 halves when mated, the
o-ring is not a replaceable part. You have got to be kidding!!?
Please tell me this is not true and that I don't have to fly to the manufacturer in China and retrieve the 50 cent part from the bin on the assembly floor.