Grundig RV City Water Fill Inlet with 3" Flange & Check Valve - 3/4" Female / 1/2" Male Threaded, Fits Motorhome, Travel Trailer & Camper

I. Product Overview

A cracked, leaking, or stripped city water fill turns every fill-up into a mess — water down the side of your rig, a soaked storage bay, and a fresh water tank that never quite fills. This 3" city water fill inlet replaces that worn-out fill port with a clean, secure connection: 1" threaded pipe on the outside, 3/4" threaded pipe on the inside.

With a weather-resistant body and a built-in check valve, it is a dependable alternative to a brass city water fill — and it installs in minutes with a twist-on spiral pipe design.

II. Product Features

• Built-In Check Valve: Stops water from backflowing out of the inlet, protecting your fresh water system and keeping the connection sealed in both directions.
• Leak-Proof Sealing: A tight, well-seated flange keeps water out of your walls and storage compartments instead of running down the side of your RV.
• Twist-On Installation: The spiral pipe design threads in by hand — pull the old inlet, twist the new one tight, and you are done. No special tools required.
• Weather-Resistant Body: Resists rust, corrosion, and UV exposure, so it holds up to campground sun, rain, and temperature swings season after season.
• Fits Most RV Fresh Water Setups: A 3/4" female outside thread accepts a standard RV fresh water hose, and a 1/2" male inside thread connects to common RV plumbing.

III. Product Specifications

• Product Type: RV City Water Fill Inlet with 3" Flange and Check Valve
• Flange Diameter: 3 in
• Outer Connection: 3/4" female threaded
• Inner Connection: 1/2" male threaded
• Thread Material: Plastic
• Package Dimensions: 9 x 9 x 8 cm (3.5 x 3.5 x 3.1 in)
• Item Weight: 90 g (3.2 oz)

IMPORTANT: This inlet is a connection point, not a pressure regulator. Always use a pressure regulator between the campground spigot and your RV. Please verify your flange mounting hole pattern and thread sizes before purchase.

IV. Package Includes

• 1 x RV City Water Fill Inlet with 3" Flange (check valve built in)
• 2 x Compressed Towel Sheets
• 3 x Mounting Screw

V. Precautions

• Don't Over-Tighten: Start the threads by hand to avoid cross-threading, and do not force the fitting — over-tightening can damage the inlet or the plumbing behind it.
• Winterize Before Freezing: Drain the inlet before the first freeze. Trapped water will expand and can split the body or the check valve.
• Keep the Cap On: Put the inlet cap back on whenever the hose is disconnected to keep dust, insects, and road debris out of the tank.
• Verify Fit Before Ordering: Measure your existing flange opening and mounting hole spacing before you buy.