a source of fresh make up water can be provided to adjust conductivity conductivity is monitored in at least one of the modules conductivity of fluid in the discharged fabric articles is monitored make up water is added to one or more modules before if the conductivity of water in the discharged fabric articles exceeds a threshold value in one embodiment one of the modules is an empty pocket that is drained of fluid when rinsing with counterflowing liquid application_number US 201313971336 A description fig1 2 show a preferred embodiment of the apparatus of the present invention designated generally by 10 a in fig1 and 2 it should be understood that fig1 includes half fig1 a and 1b that assemble at match lines a a fig2 includes half fig2 a and 2b that assemble at match lines b b in fig1 there can be seen a textile washing apparatus 10 a which employs a tunnel washer 11 having an inlet end portion 12 and an outlet end portion 13 the inlet end portion 12 has a hopper 14 that enables the tunnel washer 11 to accept soiled linen or fabric articles 25 as indicated generally by arrow 16 in fig2 a discharge 15 from tunnel washer 11 enables laundered articles such as linen to be transferred from tunnel washer 11 to an extractor the removes water such as a press 19 from the press or extractor 19 the laundered articles can be moved using a shuttle 20 to a dryer.