Aqua-Pure Whole House Scale Inhibition Replacement Water Cartridge AP431

We have several different 3M Aquapure products in our home and this AP431 whole house scale reducer is one of them. Initially you need to buy the kit as it comes with the special "T" fitting. Afterwards you can just buy the cartridges itself periodically. Side note, it's not a bad idea to stock up on these as the prices have gone up significantly since we started buying these about right (8) or so years ago. We got it primarily to protect our appliances such as our tankless water heater, shower heads, kitchen faucet and washer. So far we have zero issues to date! What also might be helping is our whole house water filtration system which takes care of sediment, rust, etc. at the source. Please see my attached photos of the cartridge as well as installed photo. **Last pro-tip** - since the cartridge threads are plastic, it's very easy to cross-thread the cartridge and chew up the threads. An old trick I learned for any screw fitting is to reverse it in first (left-loosey) until you feel the first thread "seat". This trick always ensures you engage the female threads for a perfect, trouble-free install!

A contractor installed a Rheem tankless hot water heater in my house. I love it. When I called a plumber to service/flush it out 3 years after the initial installation, he advised me to get this filter which I did & he installed. Now it seems I can go every 5-6 years between service/flushings. And we have pretty good water in my area of NorCal.

Easy to install and since we have city water, we replace once a year when we have the boiler serviced. The company we choose uses the same part and charges quadruple the costs to replace it. It's a no brainer to purchase it ourselves and have the tech install it.

I replaced a instant hot-water tankless systems and during the process, I had the plumber install the connection for the Aqua-Pure filter system directly before the instant hot water system. I replace the filter every six months as recommend. I am well water and have extremely hard water with lots of iron. I use a RainSoft water treatment system, but it seems that some chemicals make it through anyway, and I still get scaling. I have found the Aqua-Pure Scale Inhibition does make a difference, cutting down significantly on the chemicals that do sneak through the RainSoft system. I can see the difference between my two showers that are on the instant hot water system and the one shower I have that is on a traditional hot water heater. So, in that regard, I am very pleased with the performance. I would give it five stars except that switching out the filters is frustrating. I purchased the specific in-line connector for this filter, and yet, with each replacement filter, I struggle to get the filter seated so that I can screw it in properly. My plumber installed a swivel system so that I can turn the pipe to make the installation easier. However, I always end up having to take a knife and shave some of the top of the filter screw threads (plastic) in order to get it to seat properly and screw in. Once I do so, it screws in easily, and I have never had a leak.

I love the fact that it takes tons of garbage out of my water...use it to preserve my tankless water heater. However it is plastic and it threads onto a piece of metal. My plumber advises and I found out, carefully lining up the filter is required to not cross thread. When I put this in for the first time it kept feeling and looking as though I was cross threading it, as it tilted. But with some effort and pushing up on the filter when screwing it in, the thing was in fact seated properly. If you are faint of heart, pay someone to do it.

They r great quality good I’ve purchase second time

Works great and easy to replace it in the metal tee.

I was replacing my water tank every year because of leaks before I started using this. Since I started using it, we've gone 4 years without a leak, knock on wood. Anecdotal evidence, to be sure, but I'd say this is worth a try if your tank keeps leaking. You will need the adapter before you can use it. It's listed on the same page and comes with one cartridge included. We installed this directly before the hot water tank, after the rest of the cold water spits off. That means less total water going though it, and I imagine the cartridge will last longer this way. It says to replace it every 6 months, but our household are low water users, so we have been replacing it about once a year. After a year, I can shake it and still hear the chips inside, but I don't know if that means there is still active ingredient left. It's worth a try if you are at your wits end replacing water tanks. It seems to be working for us.

Great product. Works great

Fácil de instalar, no he podido comprobar que tan bien funciona, pero mi calentador de paso funciona a la perfección y lo pienso seguir usando. Siento que las malas opiniones del producto son en lugares en donde el agua es muy dura. En Monterrey, México funciona bien. Lo único que me extraña son las variaciones tan grandes en el precio del producto. El primero me costo como 4 veces mas que estos últimos. Espero que no sea por fecha de caducidad.

Me reduce estar limpiando mi monomando, no quita por completo pero alarga el tiempo en que se tapan o hay que desarmar y limpiar, dependiendo de la dureza del agua debes cambiarlo antes de los 6 meses

This actually works great at reducing scale buildup. Use it on my RV water inlet

Tengo un calentador de agua instantáneo y esto funciona muy bien para proteger mi unidad. Lo cambio cada 6 meses para obtener los mejores resultados.