What Size Water Softener Do You Need – Here’s How to Calculate It Water Softener Information By Mike / June 3, 2019 Share Tweet Pin Share Share What Size Water Softener Do You Need – Here’s How to Calculate It3.4 (67.5%) 8 vote[s] Now that you are interested in knowing the size of water softener you need for your home, certainly you already know the benefits of having a water softener installed in your home. Water that has been passed through a water softener has got various benefits which include it being safe for drinking, cooking, washing, and bathing. Water that has been passed through the softener has got all its mineral content removed effectively. Now that’s great if you know these benefits of having a water softener. 7 Steps to Size a Water Softener – Selecting the Right System for Your Needs! It is also important for you to be familiar with the various options you have when choosing a water softener. As you will probably find out, water softener selection is not a case of one-size-fits-all process. Find out in this piece what you need to know when you are considering the kind of water softener that is a right fit for your home: You will first have to determine the gains you will get from the softener First even before you attempt to determine the right fit of a water softener for your house, it will be prudent upon you to first determine just how hard your water is. The industry standard for measuring the water hardness is looking at the magnesium and calcium content of the water which is often measured in grains per gallon (GPG). If the water coming to your house is distributed by the local authority in your area, you can call them to find about the GPG level of the water. Alternatively, you can as well purchase do-it-yourself water quality test kits which are always readily available at a number of home improvement stores. There are certain instances when the water hardness level is displayed in milligrams per liter instead of grains per gallon, in this case, you can divide the result by 17.1 in order to get the GPG number. Establish the amount of water that you use in the house The other thing that you will need to find out about is the amount of water that you use in your household. You could take a look at your water meter and try to find the number of cubic meters you use for a specified time, like weekly or even daily. By knowing the amount of water that is used in your household per day, it will be so easy for you to estimate per person usage per day. You could also simply multiply the number of people living in your house by 75 gallons of water per day. Calculating the daily softening requirement This can be computed by multiplying your daily water use by the water hardness. This number is all about your daily softening requirement please have a look at this example: Hardness: 10 grains per gallon. If the daily water use is: 4 people X 75 gallons per day = 300 gallons per day To get the daily softening requirement = 10 grains per gallon X 300 gallons per day = 3000 grains per day. Going by the example shown above, the water softener will be eliminating 3000 grains per day. Please note that softeners are sized to regenerate at least once every week. Calculating your required total grain capacity A water softener can only work to remove so much hardness grains before it has to regenerate and this is got something to do with how the softening process works. At some point in time, all the resin beads inside the softener’s tank will get saturated and this makes them unable to bind with calcium and magnesium ions anymore. Regeneration basically is washing out and draining away the minerals that are accumulated in the tank and recharging the resin bed potassium and sodium. Most experts advice about regenerating the water softener every six or seven days. When this is done the softening efficiency is achieved as well as low wastewater produced. The resin bed is also conserved by protecting against iron sediment. If for instance, you multiply your daily softening requirement of 3,600 grains per seven days you will get a softening capacity of 25,200 grains: 3,600 hardness grains per day X 7 days is equal to 25,200 grains per week. Selecting a water softener to match your specifications Once you have figured out your water usage and the estimated water softening requirement for your household, it then becomes easy for you to select a softener that meets your needs and requirements. We just pointed out above that good water softeners are usually sized to regenerate once every week. Why is this so? When it is sized to regenerate once per week, it works optimum to ensure that the resin bed is kept fresh. It also won’t exert excessive wear and tear on the valve. It is vital to note that a water softener’s valve has got moving parts which only move when it regenerates. When the softener regenerates once a week it helps to keep water consumption low. When the softener regenerates, it uses approximately 50 gallons of water. Considering Efficiency Sincerely speaking if you are to regenerate a water softener’s resin bed to 100 percent efficacy it would require a very high amount of salt. On the flip side though is that partial regeneration is easy and even much more efficient. Take for instance: if you are to fully regenerate a 33,000-grain unit, you will need up to 14.1 LBS of salt. A similar model of water softener will require at least 2.6 LBS of salt to regenerate 13,000 grains. This means that with 8.3 LBS of salt, it could be possible to regenerate up to 27,600 grains. In simple words, even though a 33,000-grain system can remove 33,000 hardness grains from water in a two-regeneration cycle, it would require a very huge amount of salt to achieve this. So basically only recharging an approximate of 40% of the softening bed will still help get the job done for you at a fair amount of salt.