A single frozen pipe can shut down a production line, flood a classroom, or ruin warehouse inventory. In Southeast Wisconsin, where overnight lows regularly drop well below zero, commercial plumbing freeze protection isn't optional – it's a core part of preparing any facility for winter.
At BREDAN Mechanical Systems, our certified pipe fitters and plumbing team help commercial and industrial facilities identify vulnerable piping and put freeze protection in place before the season's first hard freeze. Here is where to focus.
Identify Vulnerable Areas
Freeze damage usually happens in predictable places:
- Piping in exterior walls, soffits, and above loading dock doors
- Unheated mechanical rooms, stairwells, and vestibules
- Fire protection and domestic water lines in parking structures
- Piping near outdoor air intakes and louvers
- Rooftop and exterior equipment connections
A walkthrough in the fall – before temperatures drop – is the most effective way to locate these risk points.
Backflow Preventer Protection
Backflow preventers are especially vulnerable because they contain small passages and check valves that crack easily when frozen.
- Drain and remove or insulate seasonal backflow assemblies serving irrigation systems
- Install insulated enclosures or heat trace on exterior assemblies that remain in service
- Confirm annual backflow testing is complete and documented for your municipality
Insulation and Heat Trace
Pipe Insulation
Inspect insulation for gaps, compression, and moisture damage. Wet or missing insulation offers little protection and can hide corrosion.
Heat Trace Systems
- Test heat trace circuits and verify controllers and thermostats function
- Check for damaged cable, failed connections, or tripped breakers
- Confirm alarm and monitoring points report to your building automation system
Exterior Fixtures and Hose Bibs
- Shut off and drain exterior hose bibs, wall hydrants, and irrigation lines
- Verify frost-free hydrants are installed with proper slope
- Disconnect hoses so water does not remain trapped in the valve body
Drains and Sanitary Systems
Freezing affects drainage too. Roof drains, area drains, and condensate lines can freeze and back up, causing roof ponding or interior leaks.
- Clear roof and area drains of leaves and debris after fall leaf drop
- Inspect heat trace on condensate lines from rooftop equipment
- Verify trap primers keep floor drain traps filled in rarely used areas
Building Operations Matter
Freeze events often begin with an HVAC issue: an outdoor air damper stuck open, a unit heater that fails to light, or setback temperatures set too low in perimeter spaces. Coordinating plumbing freeze protection with your fall HVAC tune-up gives you a complete picture of winter readiness.
Have a Plan for When It Happens
Even well-protected buildings can experience a freeze. Make sure facility staff know where main shutoff valves are located, keep emergency contact numbers posted, and have a mechanical contractor on call who can respond quickly.
Commercial Plumbing & Piping Services in Southeast Wisconsin
BREDAN Mechanical Systems provides commercial plumbing, process piping, and freeze protection services for facilities across Waukesha, Milwaukee, Kenosha, Racine, Washington, Ozaukee, and Jefferson counties. Contact our team to schedule a fall freeze-risk walkthrough of your building.
