By Prerna Kapoor, CLHMS | REAL Brokerage | April 12, 2026
April in Colorado is when your plumbing and irrigation system find out how well they survived the winter. And trust me, the answer isn’t always great.
Every spring, I talk with homeowners who discover a burst pipe, a sprinkler head that’s geysering into the neighbor’s yard, or a sump pump that quietly stopped working sometime around February. These issues aren’t just inconvenient. They’re expensive. And in a market where the median home price in the Denver metro sits at $590,000, protecting your investment starts with the systems behind the walls.
Why April Is the Critical Month
Colorado’s freeze-thaw cycle is brutal on plumbing. We can get snow in April (and sometimes May), but daytime temperatures regularly hit the 60s and 70s. That rapid temperature swing stresses pipes, especially in crawl spaces and exterior walls where insulation may be thin.
Irrigation systems get it even worse. If your sprinkler system wasn’t properly blown out last fall, there’s a good chance you have cracked pipes, broken heads, or a damaged backflow preventer sitting underground right now. You just don’t know it yet because you haven’t turned the water on.
The Colorado State University Extension recommends waiting until the risk of hard freeze has passed before activating your irrigation system. For the Denver metro and southern suburbs like Parker, Lone Tree, and Castle Pines, that’s typically mid-to-late April. But you should be inspecting everything before you flip that switch.
Indoor Plumbing Checklist
Check every faucet and valve. Turn on each faucet in your home, including ones you rarely use like the laundry room sink or the basement bathroom. Listen for unusual sounds, check water pressure, and look under sinks for drips or moisture. Slow leaks from winter damage often show up as staining on the cabinet floor or a musty smell.
Inspect your water heater. Sediment builds up over winter, and Colorado’s hard water makes it worse. Flush your water heater by attaching a hose to the drain valve and letting it run until the water is clear. This takes about 10 minutes and can extend your water heater’s life by years. If your unit is more than 10 years old, this is the time to have a professional look at it.
Test your sump pump. If you have a sump pump (common in homes with basements here in Parker and Highlands Ranch), pour a bucket of water into the pit and make sure the pump activates. Spring snowmelt and rain can overwhelm a non-functioning sump pump fast, and basement flooding is one of the most expensive repairs a homeowner can face.
Look at exposed pipes in the crawl space or basement. Check for cracks, corrosion, or green discoloration on copper pipes. If you have older galvanized pipes, look for rust spots and flaking. These are signs of wear that get worse with each freeze cycle.
Check your water pressure. You can buy a water pressure gauge at any hardware store for about $10. Screw it onto a hose bib and turn on the water. Normal pressure is 40-60 PSI. If you’re above 80 PSI, you need a pressure regulator. High pressure is one of the top causes of premature pipe failure in Colorado homes, and many homeowners don’t know their pressure is too high until something breaks.
Outdoor Irrigation Checklist
Don’t turn on your system yet if we haven’t passed the last freeze. In the Denver metro, the average last freeze date is around April 28. Turning on your irrigation too early risks refreezing water in the lines, which can crack PVC pipes underground. It’s the most common irrigation mistake I see Colorado homeowners make.
Inspect your backflow preventer. This is the device (usually near your house) that keeps irrigation water from flowing back into your drinking water supply. Check for visible cracks, leaks, or damage. Colorado requires annual backflow testing, and most municipalities in the Denver metro, including Parker, Aurora, and Lone Tree, require a certified test before you activate your system for the season.
Walk every zone before you run it. Turn on each irrigation zone one at a time and walk the entire area. Look for broken heads, heads that aren’t popping up, heads spraying the sidewalk instead of the lawn, and any spots where water is pooling or bubbling up from underground. This is where you’ll find winter damage.
Check your controller and programming. Make sure your irrigation controller is set for spring watering, not the summer schedule. Colorado’s watering restrictions vary by municipality. In Parker, for example, residential watering is limited to three days per week and you can’t water between 10 AM and 6 PM from May through October. Program your controller now so you’re not scrambling when enforcement starts.
Inspect drip irrigation lines. If you have drip irrigation for garden beds or xeric plantings (which is increasingly common in Colorado as homeowners shift toward water-wise landscaping), check all emitters for clogs. Colorado’s mineral-heavy water tends to clog drip emitters over time. A quick vinegar soak can clear minor blockages.
The Cost of Ignoring This Checklist
A burst pipe repair in Colorado averages $500-$1,500 depending on location and severity. Water damage remediation can run $3,000-$10,000 or more. A full irrigation system repair after winter damage typically costs $200-$800, but if a cracked mainline floods your yard or erodes your foundation, you’re looking at much bigger numbers.
Here’s the thing most people don’t think about: plumbing and irrigation issues can also affect your home’s value when it comes time to sell. Home inspectors in Colorado check plumbing systems carefully, and buyers in Parker, Centennial, and Highlands Ranch are paying attention to maintenance history. A well-maintained home with documentation of annual inspections and upkeep commands a better price than one with deferred maintenance.
When to Call a Professional
You can handle most of this checklist yourself over a Saturday morning. But call a licensed plumber if you find any of the following: active leaks you can’t isolate, water pressure above 80 PSI with no regulator installed, a water heater that’s making banging or popping noises, or discolored water coming from hot water taps.
For irrigation, call a certified technician if your backflow preventer shows any damage, if you find underground leaks (water bubbling up when the system is on), or if your system pressure has dropped significantly from last season. Most irrigation companies in the Denver metro get booked solid by mid-April, so schedule your spring startup now if you haven’t already.
A Quick Note on Colorado Water Conservation
While we’re talking about irrigation, it’s worth mentioning that Colorado’s water situation is real. The Colorado River compact, reservoir levels, and Front Range population growth all point to increasing water costs and tighter restrictions in the coming years. Investing in a smart irrigation controller (brands like Rachio and Hunter Hydrawise are popular here) can cut your water use by 30-50% by adjusting watering based on local weather data.
Some Colorado water districts even offer rebates for smart controllers and turf replacement. The Parker Water and Sanitation District, for instance, offers rebates for converting traditional turf to water-wise landscaping. Check your local water district’s website for current programs.
Your April Action Plan
This weekend, grab a flashlight and a notepad. Walk through your home checking every faucet, valve, and exposed pipe. Then head outside and visually inspect your irrigation system before you even think about turning it on. Make a list of anything that needs attention and get it handled before May hits.
Your home is your biggest investment. A couple hours of inspection now can save you thousands later. And if you’re thinking about selling this spring or summer, a well-documented maintenance history is one of the most underrated ways to boost buyer confidence.
Need a referral for a trusted plumber or irrigation technician in Parker, Aurora, Lone Tree, or anywhere in the south Denver metro? I’m happy to share my list. Just give me a call.
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Prerna Kapoor is a REALTOR® and Certified Luxury Home Marketing Specialist (CLHMS) with REAL Brokerage, specializing in residential real estate across Parker, Aurora, Lone Tree, Castle Pines, Highlands Ranch, Cherry Creek, Greenwood Village, and Centennial. She is fluent in English, Hindi, and Japanese (native) and is recognized as an International Sterling Society Award winner (2023, 2024, 2025). Prerna holds the RENE (Real Estate Negotiation Expert), PSA (Pricing Strategy Advisor), and ABR (Accredited Buyer’s Representative) designations.
