Technician in red shirt and cap working on pool equipment by the poolside with tools and parts box nearby.

Pool Closing & Winterization in Denver

Denver's first hard freezeusually arrives in early October — and higher elevations get there sooner. Ourcertified team blows out your lines, winterizes your equipment, and securesyour cover before the temperature does the deciding for you.

Book Your Closing Date

Call Us Now

303-431-8501

ServingDenver since 1982 · Certified technicians · Itemized quotes · Confirmed appointment windows

A $650 Closing or a Costly Repair

When water freezes inside yourplumbing lines, it expands with enough force to crack PVC, split pump housings,and fracture heater manifolds. The damage almost never shows up in October. Itshows up in May, when you open the pool and find you're not just repairing aline — you're excavating a deck to reach it.A proper closing removes thatrisk entirely. It's the cheapest insurance in pool ownership, and it only worksif it happens before the first hard freeze, not after.

Plumber wearing a blue hard hat and gloves tightening a pipe with a wrench in a mechanical room.

Cracked Plumbing Lines

Cracked plumbing lines Water left in underground lines expands and splits them — often under concrete or decking, where repair means demolition.

Damaged Pump and Filter

Trapped water freezes inside the housing. Pumps, filters, and heaters crack from the inside out.
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A Spring You'll Pay For

Freeze damage is the single most common and most expensive spring repair we're called out for.

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Residential Pool Closing Packages

Straightforward pricing for pools under 20,000 gallons. Larger pools and properties with spas get a custom quote — call us and we'll walk your property.

Recommended

Premium Closing

$650

Residential pools under 20,000 gallons

Our complete winterization. Every line cleared, every component protected, nothing left to chance through a Colorado winter.

Full water level adjustment for winter
Winter chemical treatment and balancing
Complete line blow-out — all returns, skimmers, and main drain
Winter plugs installed in all fittings
Pump, filter, and heater drained and winterized
Equipment shut down and mechanical room inspected
Winter cover installed and secured
Freeze-risk inspection with written report

Why we recommend Premium: the main drain and deep plumbing lines are where freeze damage does the most expensive harm, and they're exactly what gets skipped in a basic closing.

Book Premium Closing

Pools over 20,000 gallons, properties with spas, and commercial or HOA pools: call 303-431-8501 for a custom quote.

How your closing works

1

Book your date. Call or submit the form. We confirm a date and an appointment window in writing — no all-day waiting.

2

We walk the property. The technician reviews your equipment, layout, and any known issues before starting.

3

Water and chemistry. Level adjusted for winter, then treated and balanced to protect surfaces through the off-season.

4

Lines cleared and plugged. Every line blown out with compressed air and sealed with winter plugs — the step that actually prevents freeze damage.

5

Equipment winterized. Pump, filter, and heater drained, shut down, and inspected.

6

Cover secured. Winter cover installed and checked, plus a written freeze-risk report on anything we noticed.

Technician performing autumn pool maintenance

Covered pool during autumn with mountain views

When should you close a Denver pool?

Late September through October, in most of the metro. You want water temperatures consistently below 65°F — cold enough that algae stops growing — but the closing done before the first hard freeze.

Foothills and higher-elevation properties in Jefferson, Boulder, and Gilpin counties run one to three weeks earlier than the flats. If you're west of the metro, don't use your neighbor in Aurora as a guide.

October books up

October is our busiest stretch of the fall. Booking in September usually means picking your date instead of taking what's left.

Check Available Dates

What Our Customers Are Saying

“Thank you for installing a motor on the weekend so our guests could enjoy our pool. Your service is superb and we are VERY GRATEFUL.”

Dave & Lynn — Resident, Denver Metro Area

“You have been great and so easy to work with this summer and made our pool time great. We look forward to many more summers with Neptune Pools.”

Gary & Danette — Resident, Denver Metro Area

“Thanks so much for the help with the heater. The B-day party was great and the pool, nice and warm.”

Jill — Resident, Denver Metro Area

Closing pools across the Denver metro and the Front Range

Denver, Arapahoe, Jefferson, Douglas, Adams, Broomfield, and Boulder counties. Not sure if you're in range? Call 303-431-8501 — we'll tell you straight.

Call 303-431-8501

Frequently asked questions

When should I close my pool in Denver?

Late September through October for most of the metro. The target is water consistently under 65°F but closed before the first hard freeze. Higher-elevation properties should plan one to three weeks earlier.

What happens if I don't winterize?

Water left in plumbing lines freezes and expands, cracking pipes, pump housings, and heater components. Because much of that plumbing runs under decking, repairs often mean breaking concrete. It's consistently the most expensive avoidable repair we see each spring.

How long does a pool closing take?

Most residential closings take two to four hours depending on pool size, equipment, and layout.

Do I need to be home?

No, as long as we have access to the pool area and equipment. We'll confirm access details when you book and send a written summary afterward.

What's the difference between Premium and Standard?

Premium includes a complete line blow-out covering the main drain and deep plumbing lines, plus a written freeze-risk inspection. Standard covers returns and skimmers. If you've had freeze damage before, or you don't know your pool's plumbing history, choose Premium.

Do maintenance plan members get a discount?

Yes. Gold members save 15% on openings and closings, Silver 10%, and Bronze 5%.

Can you close a commercial or HOA pool?

Yes. We manage closings for HOAs, apartment communities, and commercial properties across the metro. Call for a property walkthrough and written proposal.

Book your pool closing before the first freeze

Fill out the form and we'll confirm your date within one business day. Or call 303-431-8501 and book it now.

Book Your Closing Date Call 303-431-8501

Neptune Pools · 1135 S Forest St, Denver, CO 80246 · 303-431-8501 · info@neptunepools.net

Not Sure What’s Wrong? We’ll Figure It Out

Share your symptoms — our technicians will diagnose and recommend the best fix.

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303-431-8501

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