By pass valves will be on the HOT and COLD lines connected to the water heater. For the pump, turn it on a listen for the sound....that's how I found mine behind a false panel below the pantry. For antifreeze, I rigged up a suction hose that connected to the pump line coming from TEE under the FW tank. Removed pump line from the TEE, add my length of tubing to the pump intake line, put the tube in a bucket filled with 2.5 gals of AF and started turning on taps till the pink comes out. Hope this helps.
2018 Cherokee 304BS.
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