Spec comparison
1/2-inch or 5/8-inch Heated Hose: Flow, Fittings and Which Listings Use Which Size
Most documented heated hoses have a 5/8 in inner diameter; the 1/2 in bore appears on low-priced marketplace hoses, in our data on one VEVOR line. A narrower hose delivers less water, and the gap grows with length. For an ordinary 100 ft garden hose at 40 psi, Iowa State University Extension lists 6 gallons a minute for 1/2 in against 11 for 5/8 in. Both sizes screw onto the same 3/4 in coupling.
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The short version
Take 5/8 in if the hose feeds a whole RV or runs 50 ft or more; take 1/2 in only if the lower price matters and reduced flow is acceptable, for example to fill a trough. The coupling is the same 3/4 in garden hose thread either way. Camco states 5/8 in on its own site. Several listings state no bore at all, so check the title of the exact model before ordering.
Short verdict
Take 5/8 in unless the price decides and you know the flow of a narrower hose is enough. The 5/8 in bore is what the documented makers build: Camco states it as the interior dimension on its own product pages, the PIRIT listing names a 5/8 in hose, and the patent behind the PIRIT hose gives 5/8 in as its example of a suitable flow path. In our data the 1/2 in bore appears only on VEVOR's lower-priced line.
Camco 25 ft (22911)
AdCamco · Established brand
The 25 ft hose whose listing names its certifications and its certifiers.
Why here: The 25 ft hose with a 5/8 in bore confirmed on the maker's own page, not only in a listing title, and with its drinking-water certifications named.
Best for: RV sites where the spigot is within 25 ft and named drinking-water certifications matter more than the lowest price.
What speaks for it
- Listing names an NSF/ANSI 61 certified hose and CSA lead-free certification to NSF/ANSI 372
- Thermostat-controlled heating cable that only heats as needed (listing)
- 5/8 in inner diameter
- Camco's own site lists a 3-year warranty with receipt
What to know first
- Camco publishes no wattage on its product pages
- Instruction sheet not available online: cord and insulation rules could not be checked
- Warranty is given as 1 year in the Amazon listing data and 3 years on camcooutdoors.com
- Costs clearly more than marketplace hoses of the same length
- Length
- 25 ft
- Rating (maker's claim)
- −20 °F (Camco)
- Inner diameter
- 5/8 in
- Heat control
- thermostat-controlled cable (listing)
- Certification named
- NSF/ANSI 61 hose, CSA lead-free to NSF/ANSI 372 (listing)
- Warranty
- 3 years with receipt (camcooutdoors.com); 1 year in Amazon listing data
What the bore does to the flow
No maker or seller in our data publishes a flow figure for a heated hose. The best available orientation is for ordinary garden hoses. Iowa State University Extension writes: “The smaller the diameter, the less water the hose will deliver in a given period.” Its table for a 100 ft hose at 40 psi, which the article calls about the usual household pressure, reads:
| Hose diameter | Gallons per minute, 100 ft hose at 40 psi |
|---|---|
| 1/2 in | 6 |
| 5/8 in | 11 |
| 3/4 in | 18 |
Source: Iowa State University Extension, “Hose Care”, 1996. The figures are for unheated garden hoses of that time; they show the direction and the rough size of the effect, not the output of any heated hose on this site.
The same article adds the second half of the rule: “The volume of water delivered by a hose per minute drops as its length increases.” Bore and length work together. A short 1/2 in hose loses less than a long one, which is why the narrow bore weighs most at 50 ft.
Whether the difference is felt at the tap depends on the whole chain, the pressure regulator and the RV's own plumbing included. We have no measurements of our own.
Which hoses state which size
| Hose | Bore as stated | Where it is stated |
|---|---|---|
| Camco −20 °F line, 12, 25 and 50 ft | 5/8 in inner diameter | camcooutdoors.com |
| PIRIT 100 ft | 5/8 in hose | listing title |
| VEVOR 25, 30 and 100 ft, “self-regulating” line | 5/8 in inner diameter | listing titles |
| VEVOR 30 and 50 ft, “built-in thermostat” line | 1/2 in inner diameter | listing titles |
| TORVA 100 ft, YOLENY 75 ft | 5/8 in inner diameter | listing titles |
| Kohree 15 and 25 ft | “5/8-inch diameter”, inner or outer not specified | kohree.com |
| RVGUARD 25 ft | not stated | maker's page read October 11, 2026 |
| REHOSEUP, Scilulu, RVSNAIL, Nottia | not stated | listings |
Two lessons from this table. The 1/2 in bore is announced in the title where it exists, so it is easy to spot. And a missing figure is common: a hose without a stated bore is not automatically a 5/8 in hose.
This selection covers only products sold on Amazon. It is not a market overview. Products are compared by manufacturer and listing data, not by hands-on testing. How we compare
| Spec sheet | Our pickCamco 25 ft (22911) | 50 ft pickCamco 50 ft (22912) | Seller data onlyVEVOR 25 ft (5/8 in) | Seller data onlyVEVOR 30 ft (1/2 in) | Seller data onlyVEVOR 50 ft (1/2 in) |
|---|---|---|---|---|---|
| Length | 25 ft | 50 ft | 25 ft | 30 ft | 50 ft |
| Rating (maker's claim) | −20 °F (Camco) | −20 °F (Camco) | −45 °F (listing title) | −45 °F (listing title) | −45 °F (listing title) |
| Inner diameter | 5/8 in | 5/8 in | 5/8 in (listing title) | 1/2 in (listing title) | 1/2 in (listing title) |
| Heat control | thermostat-controlled cable (listing) | – | self-regulating (title); on at 46 °F, off at 59 °F (seller) | built-in thermostat, on below 37.4 °F, off above 59 °F (seller) | built-in thermostat (listing title) |
| Watts (maker) | not published by Camco | not published by Camco | not stated | no total wattage stated | not confirmed |
| Certification named | NSF/ANSI 61 hose, CSA lead-free to NSF/ANSI 372 (listing) | – | “lead and BPA free” without a certifier | none; “certified” without a standard or certifier (seller) | none found |
| Warranty | 3 years with receipt (camcooutdoors.com); 1 year in Amazon listing data | 3 years with receipt (camcooutdoors.com) | – | – | – |
| Price class | premium | premium | budget | budget | mid-range |
| Best for | RV sites where the spigot is within 25 ft and named drinking-water certifications matter more than the lowest price. | Long hook-ups at seasonal sites when you want the same brand and line as the 25 ft Camco hose. | Standard RV and garden runs of up to 25 ft when a 5/8 in bore from a named brand in the budget price class is wanted. | Runs of up to 30 ft on a tight budget when a narrower bore and less flow are acceptable. | 50 ft runs on a budget when a narrower bore and less flow are acceptable. |
| On Amazon(paid link to Amazon, opens in a new tab)Ad · paid link · check price & delivery on Amazon | On Amazon(paid link to Amazon, opens in a new tab)Ad · paid link · check price & delivery on Amazon | On Amazon(paid link to Amazon, opens in a new tab)Ad · paid link · check price & delivery on Amazon | On Amazon(paid link to Amazon, opens in a new tab)Ad · paid link · check price & delivery on Amazon | On Amazon(paid link to Amazon, opens in a new tab)Ad · paid link · check price & delivery on Amazon |
- Our pickCamco 25 ft (22911)
- Length
- 25 ft
- Rating (maker's claim)
- −20 °F (Camco)
- Inner diameter
- 5/8 in
- Heat control
- thermostat-controlled cable (listing)
- Watts (maker)
- not published by Camco
- Certification named
- NSF/ANSI 61 hose, CSA lead-free to NSF/ANSI 372 (listing)
- Warranty
- 3 years with receipt (camcooutdoors.com); 1 year in Amazon listing data
- Price class
- premium
- Best for
- RV sites where the spigot is within 25 ft and named drinking-water certifications matter more than the lowest price.
On Amazon(paid link to Amazon, opens in a new tab)Ad · paid link · check price & delivery on Amazon - 50 ft pickCamco 50 ft (22912)
- Length
- 50 ft
- Rating (maker's claim)
- −20 °F (Camco)
- Inner diameter
- 5/8 in
- Heat control
- –
- Watts (maker)
- not published by Camco
- Certification named
- –
- Warranty
- 3 years with receipt (camcooutdoors.com)
- Price class
- premium
- Best for
- Long hook-ups at seasonal sites when you want the same brand and line as the 25 ft Camco hose.
On Amazon(paid link to Amazon, opens in a new tab)Ad · paid link · check price & delivery on Amazon - Seller data onlyVEVOR 25 ft (5/8 in)
- Length
- 25 ft
- Rating (maker's claim)
- −45 °F (listing title)
- Inner diameter
- 5/8 in (listing title)
- Heat control
- self-regulating (title); on at 46 °F, off at 59 °F (seller)
- Watts (maker)
- not stated
- Certification named
- “lead and BPA free” without a certifier
- Warranty
- –
- Price class
- budget
- Best for
- Standard RV and garden runs of up to 25 ft when a 5/8 in bore from a named brand in the budget price class is wanted.
On Amazon(paid link to Amazon, opens in a new tab)Ad · paid link · check price & delivery on Amazon - Seller data onlyVEVOR 30 ft (1/2 in)
- Length
- 30 ft
- Rating (maker's claim)
- −45 °F (listing title)
- Inner diameter
- 1/2 in (listing title)
- Heat control
- built-in thermostat, on below 37.4 °F, off above 59 °F (seller)
- Watts (maker)
- no total wattage stated
- Certification named
- none; “certified” without a standard or certifier (seller)
- Warranty
- –
- Price class
- budget
- Best for
- Runs of up to 30 ft on a tight budget when a narrower bore and less flow are acceptable.
On Amazon(paid link to Amazon, opens in a new tab)Ad · paid link · check price & delivery on Amazon - Seller data onlyVEVOR 50 ft (1/2 in)
- Length
- 50 ft
- Rating (maker's claim)
- −45 °F (listing title)
- Inner diameter
- 1/2 in (listing title)
- Heat control
- built-in thermostat (listing title)
- Watts (maker)
- not confirmed
- Certification named
- none found
- Warranty
- –
- Price class
- mid-range
- Best for
- 50 ft runs on a budget when a narrower bore and less flow are acceptable.
On Amazon(paid link to Amazon, opens in a new tab)Ad · paid link · check price & delivery on Amazon
A dash means that neither the maker nor the listing published a figure. The two VEVOR lines look alike in search results; the VEVOR page shows how to tell them apart.
What stays the same
The fittings. Bore and coupling are separate measures. ASME's standard for hose coupling threads covers hose sizes of 1/2, 5/8 and 3/4 in among others, and the VEVOR listings name a 3/4 in connector for both of their lines. Either hose screws onto the same spigot and the same RV inlet; details are on the page about heated hose fittings and adapters.
The rules. Laying the hose out uncoiled, plugging it directly into a GFCI-protected outlet and keeping the thermostat in open air apply regardless of bore.
The unknowns. Neither bore comes with a published link to freeze protection, and the temperature figures in the titles are the same for both VEVOR lines.
Take 1/2 in or 5/8 in?
Pick by situation
If the hose feeds a whole RV at the standard 25 ft → Camco 25 ft (22911)
View(paid link to Amazon, opens in a new tab)Ad · paid link · check price & delivery on AmazonIf you need 50 ft and want the full 5/8 in bore from a documented maker → Camco 50 ft (22912)
View(paid link to Amazon, opens in a new tab)Ad · paid link · check price & delivery on AmazonIf you want 5/8 in from a marketplace brand in the budget price class → VEVOR 25 ft (5/8 in) · Seller data only
View(paid link to Amazon, opens in a new tab)Ad · paid link · check price & delivery on AmazonIf the price matters most, the run is up to 30 ft and less flow is acceptable → VEVOR 30 ft (1/2 in) · Seller data only
View(paid link to Amazon, opens in a new tab)Ad · paid link · check price & delivery on AmazonIf you need 50 ft on a budget, for example to fill a trough, and accept the 1/2 in bore → VEVOR 50 ft (1/2 in) · Seller data only
View(paid link to Amazon, opens in a new tab)Ad · paid link · check price & delivery on Amazon
The VEVOR hoses are listing-data products: their bore is stated in the title, their other figures are the seller's statements, and none of them is a site pick. At 50 ft the 1/2 in hose is set against two wider alternatives on the page about 50 ft heated hoses.
For the choice by use, see heated RV water hoses; every documented hose with its stated bore is in the comparison by spec sheet, and the heated water hose overview starts with length.
Questions people ask
Is a 1/2 inch heated hose enough for an RV?
It carries water to the inlet, with less flow than a 5/8 in hose of the same length. No maker we read publishes a flow figure for a heated hose. Iowa State University Extension's table for ordinary 100 ft garden hoses at 40 psi lists 6 gallons a minute for 1/2 in and 11 for 5/8 in. If a shower and a faucet run at once, the wider bore is the cautious choice.
Does a 1/2 inch heated hose fit a standard spigot?
Yes. The bore and the coupling are separate measures. VEVOR's 1/2 in heated hoses come with a 3/4 in male connector according to their listings, and the 5/8 in hoses of the same brand name a 3/4 in GHT adapter. Both therefore connect to the same spigots and RV inlets.
Does a narrower heated hose freeze sooner or use less power?
Neither is documented. No maker or seller we read links the bore to the freeze protection or to the draw. The watts makers publish are given by length, not by bore: PIRIT lists 180 W for 25 ft and 360 W for 50 ft. For the 1/2 in hoses in our data no total wattage is stated.
How do I know which diameter a heated hose has?
Read the title and the description of the exact length you order. Camco, VEVOR, TORVA and YOLENY state the inner diameter. Kohree names a 5/8 in diameter without saying whether it is the inner or the outer one. Several marketplace listings, REHOSEUP's among them, state no bore. Where nothing is stated, ask the seller before buying.
Where this comes from
- Iowa State University Extension, Yard and Garden: Hose Care (Sherry Rindels, 1996)
- Camco: Heated Drinking Water Hose −20, 25 ft (part 22911)
- Kohree: heated RV drinking water hose (product page)
- US patent 8,291,939 B2: Grounding system for a heated hose (Sykes Hollow Innovations, via Google Patents)
- ASME: B1.20.7, Hose Coupling Screw Threads (Inch), scope of the standard
Keep reading
- Brand fileVEVORVEVOR heated water hoses sorted by line: 1/2 in thermostat hoses and 5/8 in self-regulating hoses from 25 to 100 ft, what the listings state and what stays open.
- Fit checkFittings & adaptersHeated water hoses end in ordinary garden hose couplings, so they fit spigots and RV inlets. What the either-end adapter is for and where a hook-up leaks.
- Buying guideRV & camperHeated RV water hoses by what the makers put in writing: which length fits your site, what the ratings mean, power draw at the pedestal and the hook-up rules.
- 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.
- Spec comparisonCompare by spec sheetWhich heated RV water hose is best? We compare what the makers put in writing: watts, ratings, certifiers, warranty and hook-up rules.
- Know-howHow it worksHow a heated water hose works: a heating wire along the hose, a thermostat that reads the outside air, a grounded 120 V plug. With maker data and the PIRIT patent.
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