Question about Hardware & Accessories
Just had a plumber run the lines for a bar sink. Now my Grundfos UP10-16 B5/ATLC 1/33 Horsepower UP10 Comfort Series Recirculating Pump is not working properly, hot water takes a long time to reach the faucet. Is this due to air in the lines? If so, how should I correct this issue?
Air in the return line could be causing the problem. To purge the line will depend on whether or not any shut off valves or drain valves are installed in the line. If there is a shut off valve in the line and a drain valve or hose bibb ahead of or towards the return line shutting off the valve and draining the line through the hose bibb should purge any air out. With out knowing the actual piping layout it is difficult to explain how to purge the line also make sure the pump wasn't shut off or kunplugged when the work was done and not plugged back in or any valves were shut off. Hope this helps.
Posted on Dec 31, 2013
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Posted on Jan 02, 2017
If your grunfos pump is clogged with hard water sediment, then it probably needs replacement.
You can try soaking it in CLR for a while, but I doubt it can be salvaged.
Sediment adheres to surfaces and there is no way to get inside the pump and scrub it out with a tooth brush.
You might benefit from replacing pump with the type that has a timer. That might save a bit of money. Or you can add a timer to the ordinary grundfos. If pump works fewer hours, it shouldn't clog up as quickly (or so the theory says)
And your water system might benefit by flushing your water heater each 6 months to prevent sediment from forming in the water heater.
Posted on Oct 21, 2010
Turn on the hot water at the farthest faucet from the water heater. Once hot water is at that sink immediately go check other taps in the home. If you have to wait more then 10 seconds for hot water at other taps then you have a branched system.
Posted on Dec 01, 2010
Following link shows links to grundfos and grundfos manuals.
1) My grundfos stopped working because sediment clogged the pump, and the motor slowed.
When motors slow, they get hot and burn up.
I ask my friend who rewinds motors how to fix it, he said in the old days, they rewound every motor, but today they throw valuable scrap into landfill, and then buy new motors from China.
I told him not to retire, but go to school and teach kids how to rewind motors, and then took apart the grundfos line and cleaned it out with CLR, but it never worked again.
2) If timer stops working, but pump still works, you can buy cheap plug-in timer and connect grundfos to the cheap timer
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Posted on Jan 23, 2011
SOURCE: Same problem as another writer
If the pump is hot, the motor has overheated and will stop working. There's no cure for motor at this point. Be sure to de-lime and de-scale re-circulation pumps occasionally.
Return pump and exchange for new. Sounds like you already diagnosed the problem correctly.
Posted on Apr 10, 2011
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