Plumbing and HVAC rules in Connecticut

Plumbing contractors in Connecticut hold an unlimited (P-1) or limited plumbing and piping contractor license from the Department of Consumer Protection's Plumbing and Piping Work Board, and workers hold journeyperson licenses.^{1, 2, 3}

Heating and cooling contractors in Connecticut hold an unlimited (S-1) or limited heating, piping and cooling license, or a limited warm air, air conditioning and refrigeration (D-1) license, from the Department of Consumer Protection. Workers hold journeyperson licenses.⁴

Connecticut's plumbing code is the 2021 International Plumbing Code, part of the 2022 Connecticut State Building Code in effect since October 1, 2022, with no local amendments.⁵ Connecticut's mechanical code is the 2021 International Mechanical Code, part of the same state building code.⁵

Ask your local building department whether replacing a water heater, furnace or AC needs a permit where you live.

If your home has a backflow preventer, your water utility can tell you whether it needs testing and who can test it.