Resource Guide

Appliance Lifespan Calculator

A worksheet to estimate how hard water, scale, and sediment may be affecting your water-using appliances. Print and fill in by hand.

Use this worksheet to estimate how water quality may be affecting appliances that use hot water or run water through small valves, screens, or heating elements. This is not a guarantee of savings. It is a practical way to organize observations before a water test.

Step 1: Identify Your Water-Using Appliances

Appliance	Signs noticed	Repair/replacement concern
Water heater	Noise / sediment / slow recovery / leaks	$
Dishwasher	Spots / film / odors / clogged spray arms	$
Washing machine	Stiff towels / odor / residue / valve issues	$
Coffee maker / ice maker	Scale / slow flow / bad taste	$
Fixtures / showerheads	Clogging / white scale / weak spray	$

Step 2: Hard Water Risk Score

White scale on faucets, showerheads, or appliances
Dish spots or cloudy glassware
Water heater makes popping or rumbling noise
Soap or shampoo does not lather well
Laundry feels stiff or looks gray
Coffee maker, humidifier, dishwasher, or ice maker needs frequent cleaning

0-1 checked: low visible impact. 2-3 checked: worth testing. 4+ checked: strong signs of hard water or mineral buildup.

Why This Matters

Scale and sediment can reduce performance in water heating equipment. Research summarized by Pacific Northwest National Laboratory found that scale and sediment can insulate water heater surfaces and, in some conditions, affect efficiency and equipment life.

Maintenance, flushing, deliming, pretreatment, or softening may be appropriate depending on water chemistry and equipment type.

Step 3: Simple Cost Worksheet

Extra soaps, detergents, descalers, bottled water, or cleaning products

Water heater, dishwasher, washer, ice maker, or plumbing repairs

Time spent cleaning scale, spots, and stains

hours/year

Appliance replacement you want to delay or prevent

Sources and Tennessee Accuracy Notes

USGS - Hardness of Water.

Pacific Northwest National Laboratory - Impacts of Water Quality on Residential Water Heating.

EPA - Drinking Water Regulations and Contaminants / Secondary Standards.

Important Disclaimer

This worksheet is educational. For health-based drinking water decisions, use your local utility report, your local/state health department, or a state-certified laboratory. A free in-home screening can help identify common issues and guide the next step, but it is not the same as a certified lab analysis for every regulated parameter.

Ready to understand your water? Schedule a free in-home water test with Pure H2O.

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