View Full Version : Loud clunk when humidifier turns off
rschmitty
02-16-2009, 04:53 AM
Recently I had a humidifier repaired, it needed a new solenoid. The humidifier never worked since we moved in but now that it is working, anytime it shuts off there is a loud clunk that can be heard around the house.
When I stand in front of the humidifier it doesnt sound as loud as I would have expected, seems like its coming from inside the pipes? Not sure how to describe it
Is this normal or is there something I can do or adjust?
[QUOTE=rschmitty;185027]Recently I had a humidifier repaired, it needed a new solenoid. The humidifier never worked since we moved in but not that it is working, anytime it shuts off there is a loud clunk that can be heard around the house.
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...."but not that its working."
Huh!! is this a typo or is it working or not?
can't make any sense out of the question
rschmitty
02-16-2009, 07:32 AM
oops.. 'now that its working'
sorry
jadnashua
02-16-2009, 09:57 AM
You may need to add a water hammer arrestor in-line. Solonoid valves open and close quickly. Opening isn't usually an issue, but closing can be - water has inertia...and it wants to keep moving. It will have to stop quickly when the valve closes, and this can cause things to move.
A hammer arrestor has a piston and a sealed air chamber or an air bladder (depends on the type). It needs to be installed close to the offending valve. But, it will be a long-term solution that should fix the problem. Sioux City, Watts, and others make them. They aren't particularly expensive ($10 or so), and should solve your problem, but they do require installation.
http://www.terrylove.com/forums/attachment.php?attachmentid=6666&stc=1&d=1235322421 (http://www.siouxchief.com/B_Product_Detail.cfm?GroupID=350300)