Using a basin wrench snug the mounting nut until the spout is secure. On Dec 3 2017. Delta Multichoice Universal Tub And Shower Valve Body Rough In Kit R10000 Unbx The Home Depot Oil Rubbed Bronze Bathroom Tub Spout Oil Rubbed Bronze Bathroom Faucets Cut out the existing o-ring on the breech piece and replace with the one supplied with your new taps before putting the new spout on. How to replace basin spout . Use the basin wrench to loosen the nut attaching the hoses to the faucet. Last updated posted 2014-Jul-15 216 pm AEST posted 2014-Jul-15 216 pm AEST User 639052 17221 posts. Push on the new spout and re-tighten locknut beneath basin. Problem replacing old hand basin spout. Alsoif you had been loosening the faucet double check underneath to be sure it isnt leaking. Lubricate the orings on the existing breech piece nipple with tap lubricant or even olive oil. You may have one two or even three nuts. Put the new faucet in position placing the appropriate valves...