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1. A valve comprising: a valve housing, the valve housing including an inner surface that defines a chamber, chamber walls that segregate the chamber into subchambers that provide a portion of a fluid path through the valve housing, and valve ports, each valve port communicating with the chamber; a diverter disposed in the chamber, the diverter having a diverter outer diameter and being configured to control fluid flow through the valve housing, the diverter including a shaft that extends through an opening in the valve housing, the shaft being rotatable about a rotational axis; and a seal assembly disposed in the chamber so as to be aligned along the rotational axis with the diverter, the seal assembly configured to provide a fluid-tight seal between the diverter and the valve housing, wherein in at least one rotational orientation of the diverter with respect to the valve housing, the diverter is configured to a) divert fluid flow circumferentially along a first circumferential fluid path portion between a first subchamber disposed between the rotational axis and the sidewall and a second subchamber disposed between the rotational axis and the sidewall, and b) divert fluid flow circumferentially along a second circumferential fluid path portion between a third subchamber disposed between the rotational axis and the sidewall and a fourth subchamber disposed between the rotational axis and the sidewall; wherein the first circumferential fluid path portion and the second circumferential fluid flow path portion are concentric.
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