Toilet Benefits and Costs
So how much does a new toilet cost? Toilets start below $50 and go up from there. You can probably spend over $1,000 for a toilet if you really want to. Studies have shown, though, that there is little correlation between what a toilet costs and its flush performance. Therefore, a good quality toilet that will perform well can be purchased for as little as $75. If you choose to hire a plumber to install, the toilet installation will typically cost between $40 and $120. For information on selecting toilets and a list of available brands and models, visit www.terrylove.com.
Toilet Cost-Benefit Calculator
The savings you will achieve with a new toilet will depend primarily on the toilet that you are replacing. Obviously, if your old toilet uses 7 gallons per flush (gpf), you will get more water and wastewater savings than if your old toilet uses 3.5 gallons per flush. Since research has shown that the average flush volume of toilets in the U.S. is just about 3.5 gpf let’s use that as our baseline.
To calculate the benefits of installing a new toilet you need to know how much you pay for water and wastewater service. You can usually find this information on a copy of a recent water bill. It is also important to determine if you are billed in thousands of gallons (kgal) or hundreds of cubic feet (HCF). If you need to convert between HCF and kgal you can use these conversions:
1 kgal (1000 gallons) = 1.34 HCF = 134 cubic feet
Please understand that the costs and savings calculated below are simple estimates. Your actual savings may be different. Also for the sake of simplicity we are not taking into account the time value of money as well as other standard elements of cost-benefit analysis.
Step 1. Calculate Your Expected Annual Water Savings
1A. Savings in Gallons per Year
1B. Savings in Cubic Feet per Year
Step 2. Calculate Your Expected Annual Water and Wastewater Cost Savings
2A. Cost Savings (gallons)
2B. Cost Savings (cubic feet)
Step 3. Calculate The Cost of Replacing All Your Old (pre-1994) Toilets
3. Number of Toilets to Be Replaced x [Cost of new toilet + Cost of Installation] = Total Installed Cost
Step 4. Calculate the Payback Period
4. Total installed cost / Annual water and wastewater cost savings = Payback period (years).