If I were in your shoes even if I had to pay upfront an extra charge I'd have the guy install two separate lines. Installs upper management to me appears to be quite fair and reasonable and I'd present them with the bill for the upcharge and request a reimbursement immediately. I say this because it will be another day out of your life if you have to ask for an installer to come back to run the second line. I think Installs, Inc. will come through for you in the end.SSN671 said:the installer insists they have to follow the work order which requires use of a single line and diplexer. And, of course, the work order is from Installs, Inc.?!