Saillong RV Water Inlet Funnel 4" Wide-Mouth for 1¼" Inlets, Black — Locking PETG, Hands-Free Filling

Saillong's 4" wide-mouth RV water inlet funnel is a locking, 3D-printed PETG adapter that snaps into 1¼" gravity water inlets to enable hands-free, splash-free filling.

Simple to use and built for repeated outdoor use, this black funnel replaces awkward pours and leaky adapters at the campground. Its extra-wide mouth accepts jugs, buckets, and high-flow hoses, while the rotating cam-lock secures the funnel to standard 1¼" RV water fill inlets. Made from durable PETG through 3D printing, it resists cracking in temperature swings and detaches quickly with a one-handed release.

How does the locking design prevent spills and hands-on support?

The funnel’s rotating cam-lock mechanism locks the body into the RV gravity inlet so you don’t have to hold it while filling. Once engaged the seal and deep funnel throat guide water directly into the tank, reducing splash back and overflow.

• Rotating cam-lock secures funnel to inlet for hands-free filling
• Deep funnel body channels water straight into the filler to prevent splashes
• Quick-release collar detaches in about 15 seconds—no tools needed

Will this fit my RV’s water inlet?

This funnel is sized specifically for standard 1¼" (31.75 mm) RV gravity water inlets, which are common on many travel trailers, motorhomes, and campers. It’s designed to connect directly without requiring additional adapters or modifications.

• Compatible with 1¼" RV gravity water fill inlets
• No adapter or permanent modification required
• Works with most common RVs, campers, and travel trailers

What materials and durability can I expect from a 3D-printed funnel?

The funnel is produced from PETG using 3D printing, chosen for its toughness and temperature tolerance. PETG resists cracking, does not easily become brittle, and stands up to repeated outdoor use and storage between camping seasons.

• High-quality PETG construction for impact and temperature resistance
• 3D-printed precision reduces warping and ensures reliable tolerances
• Designed for frequent use—weekend trips, seasonal storage, and maintenance

How easy is it to install and remove the funnel at the fill station?

Installation is straightforward: insert the funnel into the inlet and rotate the collar until it locks. To remove, twist the cam-lock collar for a quick release—no wrenches, no prying, and no extra hands required.

• Tool-free cam-lock enables fast install and removal
• One-handed operation so you can hold a hose or jug with the other hand
• Compact black profile stores easily when not in use

Who is this for: The Saillong RV Water Inlet Funnel is ideal for RV owners who want a simpler, cleaner way to fill fresh water tanks—especially solo travelers, couples, and families who frequently use jugs or large hoses. It’s a practical upgrade for anyone tired of balancing awkward containers at the fill station or dealing with splash-back and wasted water.