During the first remodel, I put in 4 holes at my Rohl farmhouse sink-PLP faucet, filtered water dispenser, and two air gaps (one for garbage disposal and one for light over the sink).I spaced them out as if I had 5 holes (filtered water, then air gap, PLP faucet in the center, and 2nd air gap on the far right).uring the first remodel, I put in 4 holes at my Rohl farmhouse sink-PLP faucet, filtered water dispenser, and two air gaps (one for garbage disposal and one for light over the sink).