The main plastic tap on the deep utility sink next to the washing machine started spraying a steady mist of water out of the side of the housing whenever the valves opened up. The mineral buildup inside the aerator had completely choked the line, creating too much backpressure for the old plastic threads to hold. Picked up a basic brass laundry faucet assembly at the store to fix the line before the next load of laundry went in.
The old mounting nuts underneath the basin utility lip were completely seized up from years of soapy water exposure. Trying to get a wrench into that narrow plastic gap behind the tub wall was a total geometric puzzle because the washing machine drain hose was right in the way. I had to use a pair of locking pliers to aggressively grip the plastic collar, slowly twisting the slick piece millimeter by millimeter until the old intake pipes finally broke loose from the threads.
Connecting the new flexible braided lines onto the main copper house supply valves caused the real delay. The old shut-off valves were slightly corroded on the intake seats, so the water kept dripping steadily even when the knob was cranked all the way down to the off position. I had to wrap the brass threads in about eight layers of heavy duty Teflon tape and tighten the compression nuts down with a socket wrench until the weeping finally stopped.
The new brass fixture is securely bolted to the utility tub rim now and the hot and cold handles turn smoothly with one finger. The water flows out in a clean, heavy stream without any spraying from the casing seams, and the connections underneath the basin are completely dry. The laundry room water hookup is fully fixed.