Need to shut off water to the house to replace worn rubber parts in a faucet. Never seen a main valve like that. It has a upper lever which has about 5 degree of free play either way (moved by finger's strength) and a lower tab which is fixed to the housing. Tried to turn the upper lever counter clockwise by hand, and by a wrench (gently, did not want to break anything) but it did not budge. If you know how to turn this off, please let me know. Much appreciated!
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