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Thanks, but as Geoman suggested, wouldn't that actually reduce the pressure being sent to the washer nozzles? Surely some, if not most, fluid is being squirted right back into the reservoir?
My system is set up without this return hose to the reservoir. With a hose connected to the out nozzle of the pump, over the side of the fender, the pump works and water is squirted onto the road. Testing the hose to the washer nozzles with compressed air, there is good air stream from all 4 washer nozzles. Connecting all without that secondary return to the reservoir and the pump whirs away, but no water emerges from the washer nozzles. Physics was never my strong suit!
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