Originally Posted by tawoo
No filter that I see and no, it was not a "poor defenseless pump" It is a pump that was straight from hell when coming on in the middle of the night for no reason.
There is always a reason for something to happen. Even if that reason is the damned thing itself is faulty.
I've noticed the pump will run in short bursts:
- About a minute after we stop using hot water.
- Several time over 3 hours after the water heater is turned off.
As the water cools off in the lines or tank it contracts.
** Search some more for the filter or a kinked line. ** Get in where the pump is located with some really good light.