fig1 a turning now to fig1 a flush valve 250 similar to fig1 is illustrated although the present device 250 has a single outlet conduit 36 located on outlet portion 252 valve 250 is suitable for use in many inboard type marine engines where valve 250 can be located on the suction side of a coolant pump not shown thus seawater 30 may be supplied through valve 250 to an engine 40 by rotating inlet portion 22 in the direction indicated by arrow 254 until the position 22 39 is reached as depicted in the hidden lines view of inlet portion 22 39 in this fig1 alternately freshwater 28 may be supplied to engine 40 by positioning valve 250 by rotating the inlet portion 22 39 in the direction of arrow 256 by an angle alpha u03b1 until the position of inlet portion 22 is reached as depicted in full lines in this fig1 the angle alpha u03b1 may be any convenient angle that provides adequate separation between inlet conduits 24 and 26 so as to avoid interference when connecting hoses thereto i prefer using an angle alpha of about ninety degrees 90 u00b0 as it is unnecessary in the present case to dispose of seawater 30 the seawater flow can simply be sealed off this is.