I am disappointed to see the seal opened. I will install this in a few days and see if it works.

Contrary to many naysayers, I do believe this technology does something to help keep sediment from settling out of water. I installed a version of one of these from another vendor 4 years ago. I recently drained my hot water heater for the first time in 4 years, and there was almost no sediment in the discharge. I was stunned, and became a believer in this technology. I purchased this unit to run a more controlled test of the ability to keep my water system from getting sediment everywhere. I am hoping this version is a bit better than the one I have, as my washing machine soap build up in the drum could use some improvement.As far as this device goes, I took a peek inside. It's very simple, two integrated circuits. One converts the incoming 24V down to 5V. This one is marked with xl semi 7005A, which is a DC-DC step down controller chip. There are the appropriate components around the part to do the rest of the work. This 5V gets fed to another unmarked chip. The output of this chip drives two transistors, which in turn drive another transistor pair. The output then goes to one of the two wires coming out of the device. The second wire is the ground wire. There is no isolation between input and output on the internal circuit board.The two LEDs are an indication that 5V is working on the board, not necessarily an indication the whole board is working. I measured an AC voltage on the two wires of about 14V. I have a meter that claims to read frequency. With that meter, I see variation between 13.8 and 14.3 kHz. I would not put a lot of stock in those numbers, other than to say it does appear that the frequency of the signal changes.If I were still working, I would probably bring this to the lab and look at it with an oscope to see some waveforms. But since I'm retired, the measurements above will suffice for now.This circuit board made in China can't cost more than a few dollars to make in quantity. My particular unit has March 2023 printed on the board, and a sticker on the outside covering up some sort of marking that has an April 2023 date on this. So this has been sitting around for awhile. The packaging is nice, there are regulatory agency labels on the AC power plug, and some nice copper bands. Those contribute to the overall cost also. That said, the profit on this must be very high. I paid $135 on a black Friday deal, and now the price is up into the $170 range.Based on what I've seen in terms of lack of real problems cleaning water fixtures, shower glass, and the sediment in my water heater, I think this technology has some merit. I opted to purchase this one to "prove it" to myself. Yarna offers a 1 year guarantee. Before I purchased it, I sent an email to Yarna and got this response: "Thank you for reaching out and for your interest in the CWD24! All our water descaler systems/models have a 1-year money-back guarantee and a 1-year replacement warranty (the replacement warranty can be extended to 10 years when you register your unit on our YARNA site within 30 days of your purchase date. "I see a lot of people write things similar to this, but I'm planning to update after 10 or 11 months to report in more detail how this has, or hasn't, helped keep our appliances using water and bathrooms cleaner. If its not helping, then back it goes.

This product is designed to help specific plumbing systems, and it does very well when used in the correct application. Hard water, but not too hard. Reasonable minerals, not excessive. This applies to most wells but not all, and where you have very high levels you probably need a full softener. Also note there are two descaling systems that I can see, one that works for 50 feet (which is nothing) and one that works for 1.2 miles (the good one). Get the good one.We are on a rural well with moderate hardness and minerals in the water. 3K square foot house with well over 50 feet of plumbing. This descaler has pretty much eliminated the orange iron stains on bathroom toilets and shower and when there are water spots in sinks or on counters they wipe off easily where they used to take serious scrubbing. We have one stainless sink that always had scale buildup because the drain was not designed quite right and a bit of water pooled and did not drain. No more, the scale is far less and comes off with a light scrub where it used to take soaking in vinegar or Barkeeper's Friend overnight.Super easy to install, you do have to get AC power to it. I put it on the 1" incoming line from our well before it hit the pressure tank. We noticed an immediate difference after installation. Several months in and we have no discernible orange iron staining and substantial improvement on water spotting on glasses in the dishwasher and on countertops. I did not have room in the well closet for a full softener so this was a good solution to keep minerals in suspension rather than removing them.

It's probably just a placebo effect, it really does not work or do anything to prevent the buildup of minerals on heating elements.I use a distiller, it's 5 liters and heats up water to a boil. The buildup after only 5 liters is still huge and even soaking it in vinegar doesn't help that much, exactly the same as before installing the Yarna placebo unit. No difference whatsoever.Look at the photos and see how much minerals are stuck to the bottom of my distiller only after distilling 5 liters of water. I do 5 liters daily, and fully clean it up before each use.Now imagine the buildup in your hot water tank after thousands and thousand of liters of water, which doesn't take that long..Yes I've installed it properly and no, it's not doing anything. Yes it's going back to Amazon. It's a waste of money.

BOTTOM LINE:After 3 years... still working strong!Tremendous time-saver and money saver on continually replacing salt weekly to monthly! Customer support is fine also!My first interest in this were the reduction of unnecessary chemicals (salt), the cost and time savings as well as the technology. We have very hard water. The TDS (total dissolved solids) is extremely high. Lots of calcium precipitation with this or the salt-water treatments.Installation location on incoming city water pipe: We installed our Yarna unit before the house water shutoff valve and connected the cord to a standard wall outlet in the basement. We did not use an extension cord. We have unplugged and reinstalled the wrapping coils at least once as we wanted a tighter fit than we initially had.Hot Water Heater to Navien A2: We had an old 60 gallon hot water heater that we replaced with a Navien A2 unit after about 1.5 years of using the Yarna unit. Both are were in our basement installed just below the kitchen. The Navien has a pre-filter so after a year we had it serviced. There were some slivers of calcium buildup in the pre-filter which we removed. There has been no negative impact on the Navien A2 unit so it's working fine.Dishwasher: We have a Bosch dishwasher (15 years old?) that exhibited serious internal calcium (white) buildup on the bottom and sides after we decided to not use the salt-treated softwater approach. Distance from the Yarna unit is about 20' (basement to kitchen). Then we installed the Yarna CWD24 as our city water lines are 1" (CWD30 works for 2" max). After about a year or so, I noticed that the dishwasher deposits were coming off. Additionally, our dishes were looking better with less calcium on them. I eventually purchase the Bosch Dishwasher Quick Descaler (#00312918 - 2 pack). The first time I used it it really (!) cleaned the insides of the dishwasher. About 6 months later, I used it again and the insides are sparkling. So we have a 'new' dishwasher! ;-)Faucets: With such success on the dishwasher, we then went to our faucets (9 in the house - some chrome, some brass). I didn't do the hose connections on the outside. We put CLR in 50% strength on almost all faucets, some with 100% strength and let it soak over night to nearly a week! In all cases we had success. The only issue we still have would be related to where CLR can't get to but these are being taken care of via the Yarna unit's ability to 'soften/eliminate' the calcium buildup in the pipes.Shower heads: Same results with CLR but we were able to remove the shower heads and soak them.Toilets: Inside the water tanks we noticed the buildup and crusting of the calcium which is being neutralized still to this day. We did replace some of the water-closets workings but not all since the calcium made some parts 'hard' (flapper etc.). Some flappers had crust on them that eventually came off - somewhat encouraged by manually wiping these areas and stirring up the calcium deposits from the bottom of the tank to be flushed out. The actual bowl is cleaner also.Shower doors: After years of taking a shower without a softener and then using the Yarna unit we noticed that parts of the shower doors (glass and brass) were losing the calcium deposits (being washed off without any effort on my part). We then started using CLR (1.5" paint brush in a cottage cheese container) and then Kaboom to clean these doors even on cultured marble. I personally like CLR a bit better (used at 50% and Kaboom at 100%) but both work! Both have some 'slickness' to them but it's very minor when you're working in the shower/bath stalls. The shower doors, floor, brass etc all look 90% better but I'm still working on them. Crevices and screw heads take a bit more time.Water taste: Removes salty taste and makes water taste more 'normal'. This may be a personal preference.Cooking: Nothing changed except there's no calcium deposits that occur nor is there any residual 'salt' added.Health: Hard to determine but, with the Yarna unit, we're drinking water without the additives.I would easily rebuy! Actually thought about a 2nd one but I’m told it’s not needed. I don't know how long it will take to fully do our pipes. I don't know of any downsides unless you desire the salt and 'slicker' water.

There are a TON of reviews on this and by and large here is mine:- Simple to install, in fact it seems almost to easy but it just is- Has reduced the hard water spotting we used to have on the chrome fixtures (not eliminate them)- Water is NOT softer, which is what they tell you. It will smooth out the structure of the mineral so it will reduce the buildup and that is the goal with this device- I didn't want a salt brine to have to deal with nor the big bags of salt and the added expense of installation- Other users, at least 94% + like the system and of course there are those who have tried it and for some reason didn't work, but the percentage is simply too high to not give it a try.- Our home is central Canada, very hard water (and added nasty chemicals), so this was installed to help add life to our hot water system and reduce the mineral deposits on the fixtures, mission accomplished there.Cons:- Power cord could be longer, perhaps a 10' cord as it's super light and takes up little space in the package

We have had the Yarna CWD24 Water Descaler installed for about a few months now and have noticed a large decrease in the amount of sediment in our water kettle. It is a clear glass kettle and had deposits that had to be scraped off before. Now, there are still some noticeable white chalky sediments, but they wipe off with a paper towel. The longer the unit is installed, less sediment is showing. Also have noted the water in the shower feels softer. Spring especially gave us an odor with our well water and that has really gone away too. Very happy with these easy changes. Looks like it will keep improving our water as time goes on with the unit installed as we have an older home with older pipes. Installation was simple. Have tape handy to hold down the ends if you are installing alone! Very happy with this very affordable purchase and its effectiveness.

I'll admit, I was a bit skeptical as to what this might do for the skin and overall dryness that I suspect is caused by the hard water here in my town. However, now that this has been installed for over one month, I can say that some spots that were essentially drying out on my skin have reversed course and are no longer drying out! I also noticed that my laundry whites are a tiny bit whiter and more interestingly, I can smell the detergent and fabric softener scents remaining on my laundry more now. Essentially proving that my laundry products are working more effectively now! The overall buying experience was great, and at the new price point, it's a no brainer. Note - my water hardness is 20.7 grains per gallon - not sure how it will work with even harder water.