My new house has one bathtub. There is no shower on the top of bathtub. Both hot and water flow through one outlet into the bath tub.
I want to add the shower. Can I connect the shower hose to the water/cold water tap outlet?
there are some Monoblock shower Tap Mixers out there - just change the single use bath tap for one of them. here's one Half price - https://www.qssupplies.co.uk/bathroom-furniture-shower-taps/142610.htm