Whirlpool WDF770SAFZ Dimension Guide

Fingerprint-Resistant Stainless Steel Dishwasher with Sensor Cycle
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A new drain hose is supplied with your dishwasher. 

If drain hose is not long enough, use a new drain hose with a 

maximum length of 12 ft (3.7 m) that meets all current AHAM/

IAPMO test standards, is resistant to heat and detergent, and 

fits the 1" (25 mm) drain connector of the dishwasher. 
NOTE: Do not connect multiple drain hoses together.


Make sure to connect drain hose to waste tee or disposer 

inlet above drain trap in house plumbing and 20" (508 mm) 

minimum above the floor. It is recommended that the drain 

hose either be looped up and securely fastened to the 

underside of the counter or be connected to an air gap.


Make sure to use an air gap if the drain hose is connected 

to house plumbing lower than 20" (508 mm) above 

subfloor or floor.


If required, the air gap should be installed in accordance 

with the air gap installation instructions. When you are 

connecting the air gap, a rubber hose (not provided) will 

be needed to connect to the waste tee or disposer inlet.


Use 1/2" minimum I.D. drain line fittings.

Use of air gap

Air gap

Undercounter Dishwasher



This dishwasher has a water heating feature and also  

requires a connection to a hot water supply line.


A hot water line with 20 to 120 psi (138 to 862 kPa) 

water pressure can be verified by a licensed plumber.


120°F (49°C) water at dishwasher


■ 3

/8" O.D. copper tubing with compression fitting or flexible 

braided water supply line. See the “Tools and Parts” section 

at the front of the guide for part details and orders.
NOTE: 1/2" minimum plastic tubing is not recommended.


A 90° elbow with 3/4" hose connection with rubber washer. 


Do not solder within 6" (152 mm) of the water inlet valve.


If installed in new construction, make sure the house 

water supply lines have been flushed prior to connecting 

the dishwasher to remove any debris that may exist in 

the supply line.

NOTE: If replacing an existing dishwasher, it is recommended  

to install a new water line (see the “Tools and Parts” section at 

the front of the guide for part details) and drain hose (supplied) 

with the new dishwasher.



120-volt, 60 Hz, AC-only, 15- or 20-amp, fused 

electrical supply


Copper wire only


A maximum of 2 field wiring supply conductors 

(12 AWG largest size) plus 1 grounding conductor 

are permitted in the terminal box.

We Recommend:


A time-delay fuse or circuit breaker


A separate circuit

If Connecting Dishwasher with a Power Cord:


Use UL Listed power cord kit marked for 

use with dishwasher. See the “Tools and 

Parts” section at the front of the guide for 

part details and orders.


Plug into a grounded 3 prong outlet. Outlet must  

meet all local codes and ordinances.

If Connecting Dishwasher with Direct Wiring:


Use flexible, armored, or nonmetallic 

sheathed copper wire with grounding 

wire that meets the wiring requirements 

for your home and local codes and ordinances.


Use a UL Listed/CSA Approved metallic strain relief. 

See the “Tools and Parts” section at the front of the 

guide for part details and orders.

Because Whirlpool Corporation policy includes a continuous commitment 

to improve our products, we reserve the right to change materials and 

specifications without notice.

Dimensions are for planning purposes only. For complete details, see 

Installation Instructions packed with product. Specifications subject to 

change without notice.

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