Backflow Enclosures in Carrboro, NC

An above-ground backflow assembly in Carrboro spends every winter exposed, and a single hard freeze on an unprotected RPZ can split the body overnight. An insulated, ASSE 1060-rated enclosure is the inexpensive fix — it keeps the assembly above freezing, drains relief discharge, and locks against tampering. Whether yours sits in a Lake Hogan Farms yard or behind a shop near Carr Mill, the right enclosure protects the certification you already paid for.

And winter in Orange County brings real freezes. A reduced-pressure zone assembly is mostly brass and water, with a relief valve that vents to atmosphere. When the temperature drops into the teens overnight, an unprotected unit can freeze solid, crack the body, or pop the relief and dump water across the yard by morning. The repair almost always costs more than the enclosure would have.

What we install — and why it matters here

An insulated, ASSE 1060-rated enclosure (often called a hot box) wraps the assembly in a drainable, freeze-protected shell. We size it to your specific RPZ or double-check valve, set it level on a proper pad, and route drainage so the relief discharge has somewhere to go. Just as important, we leave the test cocks and shutoffs accessible so your required annual test does not mean tearing the cover off. For older Claremont and Plantation Acres properties where the assembly was added years after the house, we also check that the install height and clearances still meet code before we button it up.

Carrboro’s water comes from OWASA, the Orange Water and Sewer Authority — the community-owned utility that serves both Carrboro and Chapel Hill. If you have a backflow prevention assembly on your property, OWASA sets the testing requirements you have to meet.

By default, OWASA requires annual testing of backflow assemblies. Irrigation systems with no chemical feed and no booster pump may qualify for testing every three years instead, but that is the exception, not the rule. A certified tester must perform the test, and OWASA sets the current window for reporting results — we confirm it and file for you.

Here is how the enclosure fits in: a freeze-protected hot box keeps your assembly intact through winter so it actually passes that test, rather than failing because a relief valve split in February. When we install or service an enclosure, we make sure the assembly stays accessible for the annual test, and when we perform the test ourselves, we handle the reporting to OWASA for you.