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Debbie, probably water hammer, but your pipes may not be supported/attached properly. Have a good plumber or a knowledgeable friend take a look to see if pipes hang loosely and can be attached more securely. If pipes are secure and supported properly and noise is still there a water hammer will have to be installed. Check the attached links,instruction and guides they may enable you to cure the noise from pipes on your own. Good luck.
"I hope this helped you out, if so let me know by pressing the helpful button. Check out some of my other posts if you need more tips and info." Noisy Water Pipe Hammering Tips Plumbing Maintenance and Repairs How to Quiet Noisy Water Pipes How To Fix Pipes Water hammer noise and the cures
This is known as "water hammer" noise or the result of an explosive rush of water moving through your pipes with such force that a shock wave is created and leads to a banging noise that repeats itself. Sometimes this is called plumbers knock. There is nothing you can do about that other than change the pressure externally to reduce the rush.
noise in water pipes is called water hammer and is when the water flow pulsates from an inconsistent flow. Water has mass and when stopped suddenly there is a pressure build up which moves any loose pipes. It can be fixed by putting more securing or mounting saddles on the pipe to hold it steady or you can get a pressure accumulator and it takes up the pressure build up and stops the noise. It is most prevalent when sudden stop taps are used such as ceramic taps or stop cocks and less so when you have to screw down the tap to shut off the water.
indicates that you have ceramic 1/4 or 1/2 turn inserts in the taps
These taps are very quick action taps and the water flowing is stopped immediately resulting in water hammer
The air chambers you have installed ( accumulators ) may be working but the pipes will suffer the water hammer all the way back to the utility tap on the foot path
Find out the utility pressure to the house and then you may have to install a pressure regulator on the inlet pipe to reduce that pressure to stop the water hammer
first check for loose pipes the you might want to add a damper on the pipe to absorb the hammering just t in a piece of pipe and make it go higher than the pipe with the noise and put a cap on topp of that
shower heads are fitted with a 'flow limiter' which is no more than a washer under the sealing gasket where the 'head' fits to the supply pipe.un-screw shower head from pipe,remove 'limiter' reinstall & enjoy.
Check all the bolts and fastenings for the heat shrouds around the exhaust manifold to make sure they are there (and firm). If you can undo them without snapping them, take the shrouds off to check for gravel trapped in that area. It could also be a failing cat converter, but a lot less likely. My next step would be to remove the rocker cover and have a look......
Ensure that the water pump is turned off then locate the water pump in your RV. Typical locations are under the dinette, under the bed, or in a cabinet near the sink. If you can't find it, turn on a faucet and locate the noise coming from the pump (this should be really easy!). A typical water pump will be secured by 4 screws. Remove these 4 screws and slip a rubber mouse pad under the pump. Re-secure the pump being careful to not over tighten the screws. Using a mouse pad will help absorb the vibrations from the pump to the floor. Next, we will locate the rattling water pipes. Turn on the pump. Have a friend open and close any faucet while you try and locate where the clanging noise is coming from. Typical areas are where the cold water pipe passes through or runs along a cabinet wall. In this case, the cabinet acts like a sounding board and creates a lot of noise. Take some 1/2" foam pipe insulation and wrap the pipe where it rattles against the cabinet or flooring. It should slip right over and not require any securing to the pipe. But a little duct tape on each end of the insulation wouldn't hurt. Repeat this step until you have insulated all rattling pipes. Sometimes the water pump can rapid cycle on and off (cycling ON/OFF in less than 2 seconds) during low flow conditions. This can cause pulsations in the water system and create noise. To determine if adjustment is necessary, turn a faucet ON to lower than average flow of water. The pump should cycle, but its "OFF time" must be 2 seconds or longer. If the cycling is correct, no adjustment is necessary. If the pump is cycling rapidly, increase the setting by turning the adjustment screw (see image) clockwise (1 turn MAX.) until the pump operates for 1 sec. with at least 2 sec. "OFF time".
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