Rheem® PREFERRED Water Softener

32,000 Grain Medium-Capacity System

The Rheem® PREFERRED™ 32,000 grain water softener provides households of up to 4 people with the highest-quality soft water you expect for your home. The built-in Rheem® Learning Technology learns your water usage patterns to optimize salt* and conserve water and energy. This means money savings for you. The Rheem® PREFERRED™ 32,000 grain water softener is a reliable, high-performing softener with all of the essential features and is designed, engineered and manufactured right here in the USA.

* For peak performance in your high-efficiency Rheem water softener, evaporated salt pellets or solar salt crystals with less than 1% impurities are recommended. We do not recommend using any kind of block salt in the Rheem water softeners. Learn more.

Water Softener Savings

Rheem® Learning Technology

Learns your home’s water usage patterns to optimize salt consumption, provide on-demand soft water for your home, and maximize overall softening efficiency.


Ideal for Households up to 4 people

Medium 32,000 grain capacity ensures soft water is available when you need it for average-sized households.

Optimal Water Pressure

High flow valve maintains water pressure in up to 1″ plumbing and homes with multiple bathrooms.

Easy Salt Loading

Large tank opening with hinged cover makes loading salt fast and easy.

Lasting Quality

Durable, high-impact salt storage with an internal double-lined mineral tank will not deteriorate, rust or corrode. The tanks are guaranteed for 10 years.

Low Salt Monitor

A blue status light flashes slowly to let you know when it’s time to add salt.

Eliminates Unsightly Stains

Removes clear water (Ferrous) iron that causes reddish-brown stains to form on toilets, showers and sinks.

Made in the USA

Rheem® Water Softeners are designed, engineered and manufactured right here in the USA

Backed with Industry-Leading Warranties

1-year on parts and labor (extendable to 5-years***), 3-years on electronics, 10-years on tanks.


*Based on findings from the Water Quality Association soft water benefits study.
**Based on the manufacturer’s internal laboratory testing.
***The 1-year can be extended to five years with the use of Rheem Cleaner – see warranty page for more information

Tech Specs

RHS32 Tech specs chart. These values and more appear in a textual form in a table below.
Model CodeRH32
Rated Softening Capacity (Grains @ Salt Dose)33,000 @ 14.1 lbs.
Rated Efficiency (Grains/Pound of Salt @ Minimum Salt Dose)4,940 @ 2.6 lbs.
Rated Service Flow Rate7.9 gallons per minute (gpm)
Amount of High Capacity Ion Exchange Resin0.88 cu. ft.
Pressure Drop at Rated Service Flow 14.9 pounds per square inch (psi)
Intermittent Flow Rate @ 30 psi11.8 gpm
Water Supply Max. Hardness105 grains per gallon (gpg)
Water Supply Max. Clear Water Iron8 parts per million (ppm)
Water Pressure Limits (min. / max.)20 – 125 psi
Water and Ambient Temperature Limits (min. / max.)40 – 120 °F
Minimum Water Supply Flow Rate3 gpm
Maximum Drain Flow Rate2.0 gpm
Dimensions:Height: 43-1/2″
Width: 15-1/4″
Depth: 20-1/2″

Extend Your Warranty and the Life of Your Softener

A little maintenance goes a long way to ensure your water softener maintains optimal performance. Adding Rheem® Water Softener Cleaner every four months can make all the difference. Plus, with regular use, you can extend your 1-year parts and labor warranty up to 5 years.

More About Rheem Softener Cleaner
Preferred Series Water Softener Cleanser Bottle

Owner Resources

Find answers to all of your water softener installation and maintenance questions

Rheem® PREFERRED™ Installation Guide

Need help installing your water softener? Follow this guide.

View Guide

Rheem® PREFERRED™ Product Manual

Use the product manual to learn everything you need to install, operate and maintain your softener.

View Product Manual