Intermatic 40 Amp 240-Volt Electric Water Heater Time Switch-WH40DL3 at The Home Depot
Free shipping


Model # WH40DL3

Internet # 203557614

Store SKU # 700794

40 Amp 240-Volt Electric Water Heater Time Switch

Intermatic 40 Amp 240-Volt Electric Water Heater Time Switch

This item has been discontinued.
The Home Depot no longer carries this specific product.

$54.00 / each


Model # WH40DL3

Internet # 203557614

Store SKU # 700794

The WH40 Mechanical Water Heater Time Switch regulates electric water heaters. Utilities in many areas of the country offer two electric rates for residential or commercial customers. One rate has the regular daytime rate, the other is the 'off-peak' rate. This 'off-peak' rate provides customers with lower priced electricity during the nighttime and weekend periods. This time switch allows the customer to shift electricity use into the 'off-peak' time periods in an attempt to save utility costs.

  • Double pole, single throw
  • Convenient external override switch
  • NEMA 1 rated indoor steel enclosure
  • CSA Listed
  • For use in residential, commercial, industrial, military, and school applications
  • Additional sets of trippers are available - #156T1978A

Info & Guides

You will need Adobe® Acrobat® Reader to view PDF documents. Download a free copy from the Adobe Web site.


Amperage (amps)  40  Assembled Depth (in.)  3 in 
Assembled Height (in.)  7.8 in  Assembled Width (in.)  5 in 
Certifications and Listings  1-UL Listed,CSA Certified  Color Family  Gray 
Color/Finish  Gray  Electrical Features  Programmable 
Electrical Product Type  Timer  Indoor/Outdoor  Indoor 
Manufacturer Warranty  1 year  Returnable  90-Day 
Style  Dial  Timer Type  Industrial Timer Switch 
Voltage (volts)  240  Wattage (watts)  10000 


Rated 4.3 out of 5 by 20 reviewers.
Rated 5 out of 5 by Easy DIY project I know electricity is life threatening for those that do not know how to manage it, but with the instructions and guidance of multiple videos you can do it yourself and save at least 100-200$ on labor October 14, 2014
Rated 4 out of 5 by Good Nice and easy to install. Heavy and toff. Average price October 1, 2014
Rated 5 out of 5 by timer nice product, should save on electric haveing it on at only non peak hours September 2, 2014
Rated 5 out of 5 by Timer was easy to install and program Bought this timer to replace a timer that was 20 years old. It was made by the same company that manufactured the new one. The old one was almost worn out so since it gave so many years with no problems I stuck with the same thing. The new one was easy to install and program and runs very quite. This one also has a view port so you can see the motor turning and the override switch is now mounted outside the door so you don't have to open the door to override the timer. So far it is working great. Saving me money on my power bill as well. May 6, 2014
Rated 5 out of 5 by Does just what it's supposed to do It is easy to install if you can do the most basic wiring. The on-off functions are activated by screw-on pointers that mount easily and firmly. There's an external lever if you need to temporarily override the presets. We have our water heater set to turn on for a few hours each morning and each evening. I am taking it on faith that it saves power, though. I have no comparative data to show that it is truly effective. January 7, 2014
2 3 >>


Standard Shipping includes delivery by small parcel service. Processing time varies by product.

If product is eligible for shipping to AK, HI and US Territories additional transit time and remote surcharges may apply.