Can I install my tub filler on the tub wall or actual back wall?

Yes. Certain Kingston Brass wall-mount tub fillers have a long-enough spout reach that will reach the tub. Other models have shorter spout reaches that are a great fit when mounted to the interior shower wall. We recommend working with a professional plumber when installing a tub filler; because in a bathroom design the bathtub and tub faucet configurations depend on a variety of factors.