The nut cannot be tightened hard against the soft packing

Pumps that contain gland packing will usually be constructed with a small well and piping at the gland to lead the leak water away from the pump so as to ensure that the water will not damage the bearings, housing or foundation. This can really mess up the pump area if there is a choke at the drain piping that prevents the leaked water from flowing away.
The pump gland nuts may need to be tightened every now and then due to slight loosening after some time of operation.
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