Blog
Guides from Karlsen Plumbing, Inc.
Straight answers to the questions we hear most, written for our own customers.
September 17, 2026 · 3 min read
Watching Your New Home's Plumbing Rough-In Take Shape
A walk-through of what a plumbing rough-in actually is, written for the homeowner watching their own house get built.
September 17, 2026 · 3 min read
What a Backflow Preventer Test Actually Involves
What backflow means, where a preventer is typically required, and what happens during the annual test.
September 17, 2026 · 4 min read
The Warning Signs a Water Heater Gives Before It Floods a Basement
The signs a tank water heater gives before it fails, and what changes in a Racine basement when a home switches to tankless.
September 17, 2026 · 3 min read
How to Tell Your Sump Pump's Battery Backup Has Already Failed
What a battery backup actually does, why it tends to fail without warning, and how to check yours before the next power outage does.
September 17, 2026 · 4 min read
The Ten Minutes After a Pipe Bursts in a Racine Basement
A practical look at where cold-weather pipe failures start in Southeast Wisconsin homes, and how to limit the damage before help arrives.