Hi: All...I finally got around to using the RV spray/flush "WAND". Fits on the hose with an on/off valve and fits right up the pipe through the gate valve and into the grey tank. I took out 8- 5gal. buckets of the most
water and then flushed several more out. Now the monitor reads "E". This job is not for the squeemish...I can tell you!!!
Because the tank drain is attached to the end of the tank...it is probably better to use a block to raise the other trailer side when dumping. Thanks Jim!!! Alf
escape artist N.S. of Lake Erie