I have water hammer arresters for my washing machine like in the image.
The pressure at my place is about 83 PSI (no pressure reducing valve, no expansion tank, no check valve in the main). These arresters were installed by the previous owner, probably 7 years ago.
The washing machine makes a very loud banging when in use. The only way that I have found to work around the issue is to open the valves just a little bit (it is like 90% closed).
I wonder if it is that the water arresters are damaged and need to be replaced. If so, how to replace them? Am I supposed to replace the whole plastic box, or can I replace individual arresters? There doesn't seem to be enough clearance in the box to unscrew the arresters and get new ones in.
Best Answer
Those are arresters with threaded connection and they are replaceable. Check your plumbing supplier.
You might need to remove the valves from the box in order to replace the arresters. I'm not sure the box is tall enough to take them out while leaving the valves in place. Sioux Chief makes a few other boxes like this that are taller; might be why.