We're sorry for your bad plumber experience, but we believe you are upset with the wrong guys. Please contact your plumber. For you to have found the O-rings in the packaging, the plumber had to intentionally remove them from the spout and choose to ignore the warnings. The O-rings are attached to the spout with a bright magenta tag that says in large bold print: 'IMPORTANT WARNING. O-rings MUST be used for proper installation. Failure to install the O-rings WILL cause the faucet to leak.' And again, in the installation instructions, in bold italic print: 'The O-rings MUST be used for proper installation. Failure to use the O-rings WILL cause the faucet to leak.'