Every fall, like clockwork, we start getting calls:
“Hey Bob, do I really need to winterize my sprinkler system?”
And every spring, we start getting different calls:
“Bob, water’s bubbling out of my yard and I don’t know why.”
Same system. Different outcome. The difference? Winterization.
If you own a sprinkler system in Maryland — from Bowie to Crofton, Mitchellville to Upper Marlboro — skipping winterization could cost you $600 or more in repairs. But more than that, it can wreck your yard, damage your home’s infrastructure, and throw your spring into chaos.
Let me walk you through what happens when winterization gets skipped… and how to make sure it never happens to you.
What Is Winterization, Anyway?
Winterization is the process of: – Shutting down your irrigation system – Blowing out water from all the pipes, valves, and heads – Protecting exposed components (like backflow preventers) – Turning off or programming your controller for the off-season
It typically happens in late October to mid-November, depending on when the first frost hits.
Think of it like draining a garden hose — if you leave water in it during a freeze, it cracks. Now imagine that on a system with 1,000 feet of underground pipe, 6 valves, and 40+ sprinkler heads.
What Happens If You Don’t Winterize?
1. Frozen Pipes = Cracked Pipes
When water freezes inside irrigation lines, it expands. That expansion cracks pipes underground. But because they’re buried, you won’t know until: – A zone loses pressure – Water starts bubbling out of your yard – You see a surprise soggy spot or sinkhole
Repair cost: $300–$800 depending on pipe depth and accessibility.
2. Broken Backflow Preventers
Your backflow is the above-ground unit (often near the foundation) that protects your drinking water from contamination. These are highly vulnerable to freezing.
In Crofton, we saw a backflow split in half over one weekend cold snap. The repair? $650.
3. Blown Heads and Risers
Sprinkler heads retain a bit of water in the riser. When it freezes, it can crack the riser or break internal seals. The result? Flooding, sputtering, or no spray.
Repair cost: $30–$75 per head — and most systems have 20–60 heads.
4. Valve Damage
Valves can crack at seams or fail internally after freeze-thaw cycles.
In Bowie, one zone stayed on all day due to a cracked valve body. The customer’s March water bill? $313.
Valve replacement cost: $150–$300 per zone.
5. Silent Damage That Creeps Up Later
Sometimes, pipes or valves are compromised but don’t fail immediately. Then mid-season, you lose pressure or a zone stops working.
One Davidsonville homeowner spent $1,400 on spring repairs after skipping winterization twice. He’s on our service plan now.
What Does Winterization Cost?
At TLC, we offer full-service winterization starting at $125–$175 depending on: – System size (number of zones) – Location and access – Backflow requirements
That includes: – System shut-off and controller prep – Full air compressor blowout (we use commercial compressors with the right CFM) – Backflow draining and insulation – Valve checks and inspection – End-of-season notes (head replacements, adjustments for spring)
Compare that to these common repair costs: | Repair Type | Typical Cost | |———————|—————-| | Pipe repair | $300–$800 | | Backflow replacement| $500–$700 | | Valve replacement | $150–$300 each | | Head replacement | $30–$75 each | | Labor-only diagnostics | $125+ |
Total average spring repair after skipping winterization: $600–$1,400
FAQs — Bob Carr’s No-Nonsense Answers
Q: Can I winterize it myself?
Maybe. But only if you have the right compressor (minimum 80–100 CFM), a proper hose fitting, and the confidence to do it without leaving residual water. Otherwise, a “partial blowout” is worse than nothing.
Q: Do I have to do it every year?
Yes. Even one skipped season is enough to cause major damage.
Q: What if I have a self-draining system?
Great! But we still recommend professional inspection. Not all water drains — especially in sloped yards or if heads are installed deeper than the pipe.
Q: When is the best time?
October to mid-November — before hard freezes. We recommend scheduling early to get your spot.
Q: What if it already froze and I didn’t winterize?
Turn the system off. Don’t run it. Call us for a full system diagnostic before spring.
Real Homeowner Stories (That Could’ve Been Avoided)
🏡 Mitchellville — “I Thought I Could Wait”
First freeze hit early November. Backflow split. Pipe cracked under the driveway. Final repair cost: $1,700.
🏡 Bowie — DIY Gone Wrong
Homeowner rented a compressor from a big box store. Wrong fittings, wrong pressure, missed 2 zones. One valve cracked underground. $950 in repairs.
🏡 Crofton — On the Service Plan
TLC client since 2017. 6 zones. Zero winter issues. “Bob’s team shows up, gets it done, and I don’t have to think about it.”
🏡 Upper Marlboro — “Never Again”
Skipped winterization once. Paid $480 to fix three heads and a cracked riser. “Now I call TLC every fall like clockwork.”
Trust Signals — What the Industry Data Tells Us
According to the Irrigation Association and EPA: – Winterization prevents an average of $872/year in avoidable repair costs – Systems with regular maintenance last 2x longer than those without – Only 42% of sprinkler system owners schedule winterization annually — and most of the others regret it
At TLC, we: – Winterize over 1,000 systems per year in Maryland – Maintain a 96% renewal rate on service plans – Have replaced over 150 backflows in the last 10 years — almost all due to freeze damage from skipped winterization
Why Homeowners Keep Coming Back
We’ve served families in: – Bowie — HOA communities with strict lawn standards – Mitchellville — custom systems with flower bed zones – Crofton — small lawns with high tech controllers – Davidsonville — multi-acre lots with multiple zones and dual backflows
And we’ve heard it all: > “I forgot.” > “It didn’t freeze last year.” > “I thought someone else did it.” > “I didn’t think it was that important.”
But we’ve never had a homeowner regret winterizing. Not once.
Bob’s Final Word
I’ve been doing this long enough to know — most problems in spring start with what didn’t happen in the fall.
Winterization takes less than an hour. But it protects thousands of dollars of landscaping and infrastructure.
So if you’re wondering whether it’s worth it? Let me put it this way:
You can either pay $125 now… or $600+ later.
And if you’re in Bowie, Crofton, Mitchellville, Davidsonville, Upper Marlboro, or anywhere in the Maryland metro — give us a call before the first frost hits.
Because when you ask, Bob answers.