652-A Water Arrestor

Used these to replace the old type AAA Water hammer arresters. They stopped the water hammer at the wash machine that was going throughout the house. We needed the extra volume to compensate and eliminate the hammer effect. Well made. The piston works well and should last a long time. A good value for the money. It took numerous fittings to replace the old setup. But one of the previous reviewers showed a good way of accomplishing this and he had pictures.

Works great

I don't usually write product reviews. But, I am very impressed by these water hammer arrestors. When our sprinkler valves would shut off, the line between the kitchen sink and the ice maker in the fridge would rattle with some fury. The sprinkler valves are a long distance from the kitchen and I was worried about the potential for pipe damage. As our copper pipes are in the slab, a leak would be a pain to fix. Installing the 652-As took just a few minutes as I already had pipe Ts in the lines. I installed one in the front yard near the sprinkler valves and one in the back yard next to a sprinkler valve. After installing the 652-As, our water hammer issue completely disappeared and our pipes are silent when the sprinkler valves close. Only thing I regret is not installing these years ago.

My old house has the usual "air chamber" type water hammer arresting pipe extensions above every faucet and fixture. But I recently switched the house from a private well to the village water supply, and with this came much more water pressure and also greater flow. I started to have water hammer issues where I never had before, mainly in a few places that had automatic valves (e.g. the cloths washer and the outdoor faucet that has a timer that controls watering; in those places the valves close quickly. I was faced with upgrading my existing 'pipe extension' type air chambers in hopes of eliminating the water hammer, or switching to proper water hammer arrestors. These are devices that are essentially little shock absorbers that work on the water in a pipe, and which cannot be "water logged", and thus can be expected to work for a long time without attention or gradual degradation in performance. I decided that if I was going to cut into pipes and do soldering, that I would go for the better solution. I chose Sioux Chief because they seem to be one of the major manufacturers of these products. But I learned that while many stores (Home Depot, etc) carry these products, that they are actually supposed to be selected based on static water pressure and actual water flow at the location (faucet) in question. I bought (on Amazon) two inexpensive meters to measure pressure and flow...see my other reviews of those products. I reported my findings to Sioux Chief via their inquiry form, and their technical support advised on which model arrestor I should use for best performance in my situation. The 652-A arrestor reviewed here is the one they recommended for the outdoor faucet, while a different model was deemed best for the clothes washer. The arrestors of any given size can be purchased with various connections, such as basic soldering type (the small end of the arrestor is sized like a copper pipe end, and you solder directly to the arrestor), plus screw fittings and another kind of fitting that I had never seen before. I chose the regular screw fitting. My work involved cutting the existing copper pipe just above the "tee" where the existing air chamber pipe extended up from the faucet, and soldering on a pipe fitting of the correct size. Then I just screwed the new arrestor onto that fitting, and the job was done. I thought this was preferable to soldering directly onto the arrestor, since excess heat can possibly damage the internal plunger or O-rings or whatever. I don't solder pipes professionally and figured that I might heat the arrestor more than a professional plumber would. I also like being able to quickly remove and/or replace the arrestor without doing any more soldering. I have not noted any more water hammer since I installed these arrestors, so I think they are doing their job.

If you're redoing your bathroom, don't buy the dinky ones they have at the big box stores, get this larger size that can handle more fixtures. Also, I recommend the threaded connection like this one-- I'm 100% about copper plumbing over PEX and have been soldering forever, and I've blown out a few of the solder-connected (sweat) ones over the years.

Added this to my sprinkler system that uses an auto shut-off. My water hammer was so bad that it would make sounds inside of my refrigerator when the sprinklers turned off. Now it's so quiet I can't even tell when the sprinklers turn off.

I bought two of the Sioux water arrestors and installed them at the water shut off valves for our washing machine. They substantially improved the banging of our waterlines. Not complete elimination but a good improvement. Due to a leak at one of the hose connections (which had nothing to do with the arrestors) I had to remove both of them. This was after about a month of use. Upon inspection I noticed that the piston in one of the arrestors was all the way to the back of the cylinder. I tried to bring it forward but no dice. At that point I cut the arrestor apart. The plastic cup/piston was stuck in the back. Likely a seal was leaking and the air behind the piston escaped at which point the arrestor becomes useless. Very disappointed. Just a bit more than 30 days of use. Would not buy again.

the size is small before ordering make sure check the size. return you have to pay the return shipping. seller not very helpful.