Quick answer
DIY winterization costs $30 to $60 in supplies plus 1 to 2 hours, and it's a reasonable job for a standard rig and an owner who follows a checklist. Professional winterization runs about $189 at your driveway or storage lot. The math turns on risk: a single missed line can cost $150 for a split fitting to several thousand for a burst line inside a wall, so the pro makes sense for complex rigs, first-timers, and anyone whose rig sits far away in storage.
This is a question we have an obvious interest in, so let’s handle it with actual numbers and tell you plainly when you should not pay us.
The real cost of DIY
Supplies: 2 to 3 gallons of pink RV antifreeze, a pump siphon kit or hand pump, and a bypass kit if your water heater lacks one. Call it $30 to $60 the first season and under $30 after. Time: 1 to 2 hours your first time, under an hour once it’s routine. If your rig lives at your house, you follow checklists well, and your plumbing is standard, DIY winterization is a completely reasonable job. Our step-by-step guide is the whole procedure; take it, use it, done.
The real cost of getting it wrong
Freeze damage has a brutal price curve. At the cheap end, a split low-point drain valve or faucet fitting: small parts, annoying fixes. In the middle, a cracked pump head or toilet valve: a few hundred installed. At the ugly end, a line that bursts inside a wall or under the floor, stays hidden all winter, and announces itself in April when the system is pressurized and the subfloor is already soaked: $1,000 to $5,000 and up, plus the trip you cancel while it’s in the shop.
One miss erases 10 to 20 years of DIY savings. That is the entire decision, and it’s why the question is not “can I do this” but “what are the odds I miss something, on my specific rig, this specific fall.”
When DIY is the right call
- Standard plumbing: one water heater, no residential fridge, no washer, no ice maker
- The rig is at your home, so access and timing are easy
- You’ve done it before, or you’ll genuinely follow the checklist line by line
- You remember the outside shower without being told
When the $189 is cheap
- Complex rigs. Residential fridges, ice makers, washers, dishwashers, macerators, and hydronic systems each add a failure point with its own procedure. This is where spring horror stories come from.
- First winterization on a new-to-you rig. You don’t yet know where its low points, bypasses, and quirks are. A documented first winterization becomes your map.
- The rig sits in storage across town. Driving out with a compressor and jugs, in the exact cold week everyone else is scrambling, is how “this weekend” becomes “after the freeze.” A technician who’s already at that storage lot is the fix. Whaleshine services rigs at the driveway, the campground, or the lot, priced upfront.
- You value the record. Every Whaleshine visit photo-documents each step into your rig’s service record, so next fall’s booking is one tap and spring’s de-winterization knows exactly what was done.
The verdict
Standard rig, home driveway, checklist discipline: DIY and keep the money. Anything complex, remote, or first-time: the pro visit from $189 is the cheapest insurance in RV ownership, and it’s backed by the Whaleshine Promise: if it’s not right, we make it right. Either way, do it two to three weeks before your area’s first freeze; the regional timing table is here.
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Common questions
What does DIY winterization cost?
Two to three gallons of RV antifreeze, a siphon or hand pump, and a water heater bypass kit if your rig lacks one: $30 to $60 the first year, less after, plus 1 to 2 hours.
What does freeze damage actually cost?
A split plastic fitting is a cheap part but often a shop visit. A cracked pump head runs a few hundred installed. A burst line inside a wall or floor, found in spring after soaking the structure, routinely runs $1,000 to $5,000 or more.
Which rigs should skip DIY?
Rigs with residential refrigerators, ice makers, washers, dishwashers, macerator toilets, or hydronic heating have extra water-bearing systems that each need their own procedure. Miss one and the savings are gone.
What's included in Whaleshine winterization?
Full drain, water heater bypass, antifreeze through every fixture including exterior ports, traps and toilet protected, extras like ice makers handled, and photos of every step in your service record. From $189, backed by the Whaleshine Promise: if it's not right, we make it right.
