Question
What Length of Heated Hose Do You Need?
Measure the path from the spigot to the water inlet as the hose will actually lie, then buy the shortest heated hose that covers it. With a heated hose, extra length is not a harmless reserve: the PIRIT manual forbids leaving a plugged-in hose coiled, so every surplus foot has to be laid out, and the wattage grows with the length.
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Straight answer
Buy the shortest hose that reaches. Measure from spigot to inlet along the ground, add the rise at both ends, and check that the hose's own power cord reaches a GFCI-protected outlet, because PIRIT and Miller rule out extension cords. About 25 ft fits most RV sites, 12 to 15 ft a pedestal next to the inlet. Surplus hose must not stay coiled while plugged in.
Measure three things, not one
1. The water path. Run a tape measure, or an ordinary hose you can measure afterward, from the spigot to the inlet along the route the heated hose will take: down the riser, across the ground around steps, slide-outs and tires, and up to the inlet. A straight-line guess across the site is usually too short.
2. Slack, in feet and not in coils. The hose should lie without tension. The PIRIT manual warns: “DO NOT pull or tug the hose with excessive force as this may damage the fittings and electronic components.” A few feet of slack laid in a gentle curve are fine. A coil is not.
3. The power path. This is the measurement people skip. The hose's cord comes out at one end, and it is short: Camco's listing names a 6 ft cord. That end has to be within reach of a GFCI-protected outlet, because PIRIT writes “Do not use extension cords” and Miller Manufacturing “no extension cords.” Check which end of the hose carries the cord and whether your outlet is at the spigot end or at the RV or building end. Some sellers state that the water source can go on either end of their hose, which helps here.
Why shorter is better with a heated hose
With an ordinary hose, 50 ft for a 20 ft run is merely untidy. With a heated hose it has consequences:
| Longer than needed means | Source |
|---|---|
| The surplus must be laid out, never coiled: a coiled, plugged-in hose “can cause the hose to overheat and melt” | PIRIT manual |
| More power while heating: 90 W at 12 ft, 180 W at 25 ft, 360 W at 50 ft, 500 W at 100 ft | PIRIT manual; Miller for 25 and 50 ft |
| No way back: “Do not attempt to cut or splice hose”; see can you cut or shorten a heated hose | PIRIT manual, Miller instruction sheet |
| A higher price class | The price rises with every length step |
Camco and Kohree publish no wattage, so for their hoses only the first, third and fourth row can be stated.
From your measurement to a length
| Measured path including slack | Length to buy | Details |
|---|---|---|
| Up to about 12 or 15 ft | 12 or 15 ft | Short heated hoses |
| Up to 25 ft, or just over | 25 or 30 ft | 25 and 30 ft hoses |
| Up to 50 ft | 50 ft | 50 ft hoses |
| Up to 75 ft | 75 ft | 75 ft hoses |
| Up to 100 ft | 100 ft | 100 ft hoses |
| More than 100 ft | Rethink the run first | 150 and 200 ft |
If your measurement lands between two sizes, take the next one up and plan where the extra feet will lie flat. If it lands only a foot or two above a size, look at the route again before paying for the next step: a different path around the steps may save that much.
One example per common length
If the spigot is within about 15 ft of the inlet → Kohree 15 ft
View(paid link to Amazon, opens in a new tab)Ad · paid link · check price & delivery on AmazonIf the run is up to 25 ft, the usual case on RV sites → RVGUARD 25 ft
View(paid link to Amazon, opens in a new tab)Ad · paid link · check price & delivery on AmazonIf the spigot is at the far end of the site, up to 50 ft → Camco 50 ft (22912)
View(paid link to Amazon, opens in a new tab)Ad · paid link · check price & delivery on AmazonIf the run goes to a barn, tank or garden bed beyond 50 ft
These three are examples from different price classes, not a ranking; each length page compares the alternatives and says what each maker puts in writing. For the RVMATE hose all data comes from its listing, and its −20 °F figure is the seller's statement.
Two things length does not solve
Reach for the cord. A longer hose does not bring the plug closer to the outlet if the cord sits at the wrong end. Sort out the outlet first; the PIRIT manual tells owners to have a qualified electrician install a suitable outdoor receptacle next to where the hose is used.
Colder weather. Temperature ratings are the makers' claims and do not depend on length.
Our starting point for most RV sites
RVGUARD 25 ft
AdRVGUARD · Brand with its own product page
The low-priced 25 ft hose whose maker states watts per foot and thermostat switch points.
Why here: 25 ft covers most pedestal-to-inlet runs, and this hose's maker states 7 W per foot and the thermostat's switch points. The −20 °F rating is the maker's claim.
Best for: Occasional cold-weather trips and garden use when the budget is tight and the maker's −20 °F claim is enough.
What speaks for it
- Maker states a 7 W per foot heating cable
- Maker states the thermostat switches on at 47 °F and off at 60 °F
- Title names RV, home and garden use
- Budget price class among the 25 ft hoses we compare
What to know first
- No certification body named: the maker says lead-free and BPA-free without a certifier
- Maker's page gives no rules on extension cords, GFCI or added insulation
- 12-month guarantee, shorter than Camco's 3 years
- Rating is the maker's claim without a named test method
- Length
- 25 ft
- Rating (maker's claim)
- −20 °F (RVGUARD)
- Heat control
- thermostat, on at 47 °F, off at 60 °F (RVGUARD)
- Watts (maker)
- 7 W per ft (RVGUARD); no total published
- Certification named
- none; “lead-free, BPA-free” per maker
- Warranty
- 12 months (RVGUARD)
Whether two hoses can be joined for a long run is discussed under can you connect two heated hoses. The heated water hose overview explains the product type, and more short answers are under questions and answers.
Questions people ask
Is it better to buy a longer heated hose just in case?
No. A heated hose that is longer than the run cannot be left in a coil: the PIRIT manual warns that a hose left plugged in while coiled can overheat and melt. The whole length has to be laid out. A longer hose also draws more power while heating, 360 W for 50 ft against 180 W for 25 ft according to PIRIT and Miller, and it costs more.
What if my site needs a different length every time?
Buy for the sites you actually use in freezing weather, not for the worst case of the whole year. If most winter stays fit 25 ft, that is the length to buy. For the rare longer run, check whether the park has a closer spigot. Shortening a heated hose is not an option: the PIRIT manual says not to cut or splice it.
Can I join two short heated hoses instead of buying a long one?
We found no maker statement that allows or forbids coupling two heated hoses. What is certain: each hose has its own cord and needs its own GFCI-protected outlet within reach, since PIRIT and Miller rule out extension cords, and the joint adds a coupling in the middle of the run that neither maker's instructions cover. One hose of the right length avoids both issues.
Which lengths do heated water hoses come in?
Common lengths are 12 or 15, 25 or 30, 50, 75 and 100 ft. Camco's own site lists its −20 °F line in 12, 25 and 50 ft. The PIRIT manual gives electrical ratings for 12, 25, 50 and 100 ft. RVGUARD lists 15, 25, 50, 75 and 100 ft. Lengths above 100 ft are rare; the page on 150 and 200 ft hoses covers them.
Where this comes from
Keep reading
- Buying guide25 & 30 ft25 ft and 30 ft heated water hoses compared by maker data: 180 watts and 1.5 amps, ratings as maker claims, named certifiers, warranty, and when 30 ft is better.
- Buying guide50 ft50 ft heated water hoses for RV and garden: 360 watts and 3 amps per PIRIT and Miller, 5/8 in versus 1/2 in bore, price classes and the rules for a long run.
- Buying guide12 & 15 ftShort heated water hoses of 12 and 15 ft compared by maker data: 90 watts at 12 ft per PIRIT, ratings as maker claims, and when a short hose beats 25 ft.
- Buying guide100 ft100 ft heated water hoses for barn, garden and RV: 500 watts and 4.5 amps per the PIRIT manual, three models compared, and the rules for laying out a long run.
- Buying guide75 ft75 ft heated water hoses come from marketplace brands only: Camco, PIRIT and Miller skip the length. Two models compared, plus when 50 or 100 ft is the better buy.
- QuestionCan You Connect Two Heated Hoses for a Longer Run?The threads fit, but no maker we read allows or forbids coupling two heated hoses. Each needs its own GFCI outlet, and the joint stays unheated. The options.
Compiled by
heatedwaterhoses.com Editorial Team
Spec sheets, manuals and electrical rules for winter water hook-ups
We are the editorial team at heatedwaterhoses.com. We read the manuals, spec sheets and listings of heated water hoses line by line, check drinking-water and electrical claims against primary sources such as the EPA and the National Electrical Code, and turn that into plain-English buying advice with sources on every page.
- Manuals quoted with source
- Watts and amps per the maker
- Ratings labeled as maker claims
- Compared by manufacturer data
- Publisher details in the imprint