Got 6 spigot mounted drip timers, all with back-flow preventers. The brass ones from HD make a humming or squealing noise whenever they run. Plastic ones don’t make noise, but they only last a summer. I only put plastic ones on the house spigots.
I was in the house early this AM, when I heard a humming from the master bath, over where the water-heater is located. Thought it was a leak. Went out and opened the exterior door and it was coming from under the water heater. So, heck, I go around the house for gloves, screw-gun, and stuff to pull the skirting off, and happen to walk by the spigot about 100′ from the house. It’s timer has kicked in and it’s running and humming. So I hit the shut off. Go back and silence in the heater cab. Turn it back on, hums in the house.
The vibration was being transmitted up from the timer, down the galvanized spigot, througn 100′ or so of 1″ PVC, up to the house connection.
I think the water pressure is up ’cause none of’em was making that noise yesterday.
Strange….
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I got a feeling, that you could install a simple water hammer arrestor, type deal, and solve the problem.
When you hear the Weird noise, can you turn on the water in a sink or something and see if it goes away?
Damn, this got moved!
Anyhooo, yes. If I turn on the tap or flush the toilet in the MB, the frequency increases, then gradually comes back to where it was. This ONLY happens when the drip is running. Otherwise, it's silent...like it should be. Figure the drop in pressure resonates with the pressure wave causing a Hesingburg-like sympathetic vibration in the water molecules that transmit a weak force to the PVC atomic matrix.
I should submit a paper to the IAEA to sidetrack any water-borne atomiic weapons apps to our enemies....
Dam, Dude you are tecknikal!I love the in depth analysis you give!Where did ya get your education from? I need to spend a day or more there!
Got it at Monkey Ward for a dollar-two-ninety-eight. They're outta business now, so you'll just have to stay ignernt. ;-)
Poorly machined/ polished out castings. Plastic is Inj. Mold and has fewer rough passages. Polish and port the guts on the brass and it'll sing the tune instead of hum the melody.
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So yer sayin' that Chinese brass is rougher than People's Plastic?
I sense a cultural bias... ;-)
I've found that if the flow through a faucet with a backflow preventer is too low, I get chattering. The shape of the internals in the timer may be making it worse. Try seeing if the noise goes away when something with a larger flow is connected in place of the drip system.
Thanks. Just strange that the plastic ones don't chatter. The drip timer w/o pressure regulator delivers about 40 PSI. No way I can change it.