A multifunctional valve assembly comprising: a first portion; and a second portion, wherein the first portion includes a first 3-way valve functionality for selectively controlling flow of a first fluid; the second portion includes a second 3-way valve functionality for selectively controlling flow of a second fluid; wherein the multifunctional valve assembly further includes a common motor associated with the first and second portions and and operative to drive both of the first and second portions and to operate in first, second and third operational modes, and wherein the multifunctional valve assembly further includes a valve housing, a first sleeve rotatably disposed in the valve housing, the first sleeve including a first sleeve portion and a second sleeve portion that rotate together about an axis, the first sleeve portion adapted to control flow of the first fluid through the valve housing and the second sleeve portion adapted to control flow of the second fluid through the valve housing, wherein the first sleeve is an inner sleeve, and wherein the valve assembly further comprises an outer sleeve circumferentially surrounding the first sleeve, wherein the outer sleeve is rotationally fixed relative to the valve housing and the inner sleeve is rotatable relative to the outer sleeve characterized in that the valve assembly further comprises a one-piece tubular gasket carried on an outside of the outer sleeve and thereby rotationally fixed relative to the valve housing, the tubular gasket sealing the valve housing relative to each of the outer sleeve and the first sleeve portion and the second sleeve portion of the first sleeve. a first portion; and a second portion, wherein the first portion includes a first 3-way valve functionality for selectively controlling flow of a first fluid; the second portion includes a second 3-way valve functionality for selectively controlling flow of a second fluid; wherein the multifunctional valve assembly further includes a common motor associated with the first and second portions and and operative to drive both of the first and second portions and to operate in first, second and third operational modes, and wherein the multifunctional valve assembly further includes a valve housing, a first sleeve rotatably disposed in the valve housing, the first sleeve including a first sleeve portion and a second sleeve portion that rotate together about an axis, the first sleeve portion adapted to control flow of the first fluid through the valve housing and the second sleeve portion adapted to control flow of the second fluid through the valve housing, wherein the first sleeve is an inner sleeve, and wherein the valve assembly further comprises an outer sleeve circumferentially surrounding the first sleeve, wherein the outer sleeve is rotationally fixed relative to the valve housing and the inner sleeve is rotatable relative to the outer sleeve characterized in that the valve assembly further comprises a one-piece tubular gasket carried on an outside of the outer sleeve and thereby rotationally fixed relative to the valve housing, the tubular gasket sealing the valve housing relative to each of the outer sleeve and the first sleeve portion and the second sleeve portion of the first sleeve.