4 inches is the standard spacing for the compact centerset faucets a single piece faucet needing either three holes for the hot and cold water valves and the drain popup or two holes with no popup.
Distance between faucet and soap dispenser.
The dish soap dispenser is 4 inches to the left i think they said and the air switch for the gd is 4 in to the right.
My faucet configuration goes this way left to right sprayer faucet water on off control soap dispenser.
It s closer to the cold water faucet which is normally used most when washing hands well i don t tend to use the hot water faucet to wash my hands.
Take note of the distance between touchless soap dispenser and faucets in avoid of accidents related distance between the center of round hole and sinks that could confirm the residual of soap dispenser to the bathroom sink.
For my other 30 sink i have a faucet soap dispenser air switch and i put them much much further apart.
My dispenser drips exactly down the inside edge of the sink.
They are all about 2 away from each other i think see picture.
It s typically 4 inches between handles or between the spout and the handle for bathroom faucets and 8 inches for kitchen fixtures.
4 6 or 8 inches are the standard spacings for mini widespread bathroom faucets which consist of three separate pieces all are three hole configurations allowing for the valves and the spout.
It s ok to think outside the box and not space your accessories evenly as in this design.
When more than one hole is required you ll find the required hole spacing in the product specifications or you can measure the distance between faucet s tailpieces yourself.
Here the faucet is centered on the sink the handle is 4 inches to the right of the faucet and both the soap dispenser and air switch are 8 to 9 inches from the faucet.
Ours faucet is centered on the sink since it s in the middle of the island it has a built in sprayer so we didn t need another hole for one.
As the other poster mentioned be sure it s close enough to the edge.