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Re: Loud hammering noise with vibration on piper when the...
You're experiencing "water hammering" it's solvable too. You can buy anti-hammer add-ons which you can put under a nearby sink, or even on an outside hose bib. This will give the water pipes an air "shock absorber"... since air compresses it cushions the abrupt changes in the pressure where as if it's just water, it'll slam and hammer and vibrate... Try an anti hammer device added to you supply... you should be able to add it with out too much tearout. K
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When the valve filling the cistern shuts off it does so qu icky causing a rapid increase in pressure in the supply pipe this causes a bang in the piping called water hammer. There is a device called a hammer arrestor which,when installed will absorb the shock of the closing valve and eliminate the hammer. It is basically a spring loaded rubber diaphragm. A section of piping in which air was trapped used to be used as an arrestor but over time the air would dissolve into the water and would quit working the new spring loaded diaphragm type are best way to go.
Hope this helps.
Hey- most hammer is removed by simply replacing the water valve. Have solved this way many times. Exceptions required spring suppressors on lines to faucets. Valves run about 40-60$ and are easy to install. Let me know if this info helps- have more if needed- Thanks- Ed
Check the power to the valve actuator with a meter. If the power is not fluctuation (causing the valve to open and close quickly) then the problem is likely "water hammer" in the piping leading to the DW. Water hammer occurs when a fast flow of water turns a corner in the piping. The solution is too find where the pipe is vibrating and add support. Another way to eliminate water hammer is to install a shock tube on the pipe. It is filled with air and acts as a shock absorber when the water hammers. They are available at Home Depot, Lowes, plumbing supply places, etc. Another way to make a shock absorber is to install a tee in a horizontal part of the pipe with an 18 inch+ piece of pipe installed vertically and capped at the top. Air gets trapped in the vertical pipe and cushions the vibration. You might be able to do this in the space behind the DW before the pipe connects to the DW. The shock tube is smaller and does not have to be vertical so if space is an issue that may be the way to go.
1. You may have high water pressure, causing the internals of the fill valve to vibrate and that vibration wave being transferred to your water pipes causing a reverberation noise called hammering.
An easy fix for this would be to reduce the flow to the fill assy. by turning down the units supply valve from wide open to about half way open. A few more permanent solutions may include, The installation of a Water hammer damper device - installation of a PRV pressure reducing valve - Although not intended for this issue is an air charged bladder style expansion tank installed, this device has been proven to reduce water hammering.
2. Water pipes that are not properly secured, loose and allowed to shake when there is a sudden surge of flow pressure. Much like a garden hose flexes when the nozzle is quickly turned on. This issue is most common with CPVC (plastic) water lines due to their flexibility and will require many more secure points.
A fix for this is a bit more labor intensive, due to having to access the un-exposed water lines in walls and ceilings so as to inspect and/or re-secure them to their surrounding structures.
A tip for securing the pipes where they penetrate through wall studs is to inject an expanding foam product in to the studs penetration, hence when the foam expands and cures it will form a very snug fit.
Note: if ether of these are the case, the problem should not be allowed to continue, because water pipe leaks could occur at the solder or welded connections and/or at locations where the pipes are rubbing against an abrasive surfaces causing a rupture.
The vibrating sound you hear could be due to "water hammer" when the fill valve tries to close against high water line pressure. I had that problem and solved it by putting a small valve in the line to the ice maker and closing it little by little until the vibrating went away. You know, the banging could also be water hammer. It only happens at night when the entire neighborhood is asleep and the water pressure is at its highest. You need to check this out because water hammer can be very destructive to the plumbing and the valve.