How To Look At A House

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What is the code minimum size of a dishwasher water supply line?

Wednesday, September 14, 2022

The Florida Plumbing Code (Table 604.5), along with the International Plumbing Code (IPC), specify a minimum 1/2” supply line to a dishwasher. So the 1/4” poly supply line shown above is not acceptable.

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Here’s links to some of our other articles about dishwashers:

When was GFCI-protection for kitchen dishwasher receptacle outlet first required? 

 Can a dishwasher be wired to a kitchen counter small appliance receptacle circuit?

 • Can a dishwasher drain hose be connected after the sink trap (to the trap arm)? 

• How far away from the sink can I install a dishwasher?

What is a "high drain loop" or "air gap" in a dishwasher drain hose? 

• Does a home inspector check the dishwasher? 

• Is a dishwasher a plumbing fixture? 

 What is the average life expectancy of a dishwasher?

• Does code require a water shut-off valve for dishwashers? 

• What is the code minimum size of a dishwasher water supply line?


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