Camco RhinoFLEX 10-ft Sewer Hose Extension Kit (39764)

Published · Researched 2026-09-21

2026 lineup note — OPEN SUBSTITUTION: The catalog plan called for a "Camco RhinoFLEX 15-ft extension," but no 15-ft RhinoFLEX extension exists in the 2026 lineup — SKU 39761, which the plan assumed, is the 15-ft KIT (hose + swivel bayonet adapter + 4-in-1 translucent elbow + caps + locking rings; also cross-listed as 39770), verified across CamperiD, DK Hardware, Buchheit, and Camping World listings in Sept 2026. The actual RhinoFLEX extension product is the 10-ft Extension Kit, SKU 39764 (also cross-listed as 39774 on Amazon) — 10-ft of RhinoFLEX hose with pre-attached swivel lug and bayonet fittings, no elbow or caps. This dossier documents 39764, and the 20-ft kit dossier (camco-rhinoflex-20ft) has been corrected to match. The extension's job is unchanged: it turns the 20-ft kit into 30 ft for far dump stations.

Version lineage (2023–2026)

• 39764 (10-ft extension): the long-running RhinoFLEX extension — 10' hose, pre-attached swivel lug + bayonet, reusable locking ring, compresses to 39" for 4" bumper storage. Cross-listed as 39774 on some Amazon listings (same product, alternate SKU).
• 39761: the 15-ft KIT (not an extension) — the corrected record, for anyone cross-referencing older versions of this catalog.
• Smart-buy advice: one extension covers the "far inlet" scenario; two extensions + the 20-ft kit = 40 ft for the truly cursed site layouts.

Overview

The 39764 is the "just in case" accessory every experienced RVer eventually buys: 10 feet of the same 23-mil polyolefin/steel-wire RhinoFLEX hose as the kits, with pre-attached swivel lug and bayonet fittings on both ends so it chains onto any bayonet-equipped sewer hose. It compresses to 39" including fittings — short enough for a 4" square bumper — and because the fittings swivel, it connects without fighting the hose. No elbow, no caps, no adapter: it's hose-only by design, since it extends a kit you already own.

Key Specs

Pricing

• Street (Sept 2026): ~$23–36. Observed: NVN Marine $23 (listed as "$13 off," implying ~$36 list). Re-verify live — extension pricing moves with Camco promos.
• All prices USD, research date 2026-09-20.

In the Box

• 1 × 10' RhinoFLEX extension hose (pre-attached swivel lug + bayonet fittings)
• 1 × reusable locking ring
• (No elbow, no caps, no 4-in-1 adapter — those come with the kits.)

Warranty

UNVERIFIED — Camco's warranty terms for the 39764 could not be confirmed from a primary source during this research. (The RhinoFLEX 15-ft kit's Amazon listing states "Limited 1 Year" — do not assume the same for the extension; confirm with Camco.)

Support & Parts

• Camco (Greensboro, NC) handles support; the reusable locking ring is the serviceable part — fittings can be moved to a new RhinoFLEX hose.

Community Verdict

The extension doesn't get love letters — it gets "glad I had it" stories. The community pattern: owners buy the 20-ft kit, then encounter the dump station or full-hookup site where the inlet is 25 feet from the RV outlet, and the extension moves from nice-to-have to essential. Because it uses the standard bayonet interface, it chains onto RhinoFLEX kits, RhinoEXTREME kits (shared bayonet standard — cross-compatibility highly likely but UNVERIFIED from Camco), and most competitors' bayonet hoses. The 39" compressed length is the practical detail owners cite — it actually fits the bumper, unlike a second full kit's worth of elbows and caps. Durability expectations match the RhinoFLEX line: years of service, with the known long-term caveat of polyolefin cold-cracking — the reason the RhinoEXTREME exists for owners who want the tougher hose.

Long-term durability & warranty-claim reality

• Same hose, same caveats as RhinoFLEX: 23-mil polyolefin + steel wire — durable for years, but cold-weather cracking/splitting is the documented long-term failure mode of the FLEX line (see the RhinoEXTREME dossier for the comparison).
• Fittings: permanently attached, no-leak swivel design; reusable locking ring allows fitting transfer to a replacement hose.
• No elbow/caps to break: the hose-only design has fewer rigid parts than a kit — fewer failure points.
• Warranty-claim reality: UNVERIFIED — no owner claim narratives found in this research pass.

Version history — year by year

• Pre-2023: 39764 established as the RhinoFLEX extension; alternate listing SKU 39774 circulates on Amazon.
• 2023–2026: unchanged; compresses-to-39" and bumper-storage compatibility constant. Pricing ~$23–36 (Sept 2026).

Head-to-head vs closest rivals

• vs Camco RhinoFLEX 20-ft Kit 39742 (in this catalog): not a rival — the extension's reason to exist. Buy the kit first; add the extension when a far inlet humbles you. Note the kit includes elbow/caps the extension lacks — together they're the complete long-reach setup.
• vs buying a second full kit: the kit gives you a spare elbow and caps; the extension is cheaper and packs smaller (39" vs. a kit's worth of parts). If your first kit's fittings are aging, a second kit refreshes everything; otherwise the extension is the economical reach.
• vs Camco RhinoEXTREME 20-ft 39867 (new in this catalog): if you already upgraded to the EXTREME kit, the FLEX extension still chains on via the bayonet standard (UNVERIFIED officially) — or wait for a sale and consider whether you want the tougher hose throughout.

Care & maintenance

• Rinse after use; the extension sees the same sewage as the main hose — cap the ends if you have spare caps (none included).
• Compress fully for storage; the steel wire holds the collapsed shape.
• Inspect the bayonet prongs for wear — they're the connection's wear point across chained sections.
• Same cold-weather caution as RhinoFLEX: avoid sharp folding when the hose is cold and stiff.

Buying traps

• 39764 vs. 39774: same 10-ft extension, alternate listing SKU — don't buy both thinking they're different.
• 39761 is NOT the extension: it's the 15-ft kit (with elbow and caps). If a listing shows 39761 as an "extension," the listing is wrong — this catalog's earlier versions made the same error, now corrected.
• Hose-only: no elbow, no caps, no 4-in-1 adapter included — it's an extender for a kit you own, not a standalone solution.
• "Extension" vs. "kit" pricing: extensions are cheap (~$23–36) because they're hose-only; if a "39764" listing approaches kit pricing, something's off.

Images

• camco-rhinoflex-10ft-extension-1.jpg — hero/product shot (coiled extension with fittings)
• camco-rhinoflex-10ft-extension-2.jpg — bayonet/lug fitting close-up
• camco-rhinoflex-10ft-extension-3.jpg — chained to kit hose (in-use) or compressed for storage
• [research workspace] — package front + compressed hose (added 2026-09-20)
• [research workspace] — retail box front (added 2026-09-20)
• [research workspace] — hose extended, fitting detail (added 2026-09-20)

See [research workspace] for dimensions, sources, and what each depicts.

Research date: 2026-09-20. Prices and availability change frequently — re-verify live before purchase. Figures marked UNVERIFIED could not be confirmed from a primary source during this research.