Grundig Brass 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 fill port 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" brass city water fill inlet replaces it with a solid metal body that seals the same way the original did.

It is the upgrade path for an RV that sees regular hookups — a part you install once and stop thinking about.

II. Product Features

• Built-In Check Valve: Stops water from backflowing out of the inlet and keeps your fresh water system sealed.
• Solid Brass Body: A metal body that holds its shape and threads far longer than a plastic fitting.
• Corrosion-Resistant: Brass stands up to sun, rain, and temperature swings without rusting or pitting.
• Drop-In Threaded Fit: Threads into your existing plumbing the same way the original inlet did.

III. Product Specifications

• Product Type: Brass 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
• Material: Brass
• Item Weight: 183 g (6.5 oz)
• Package Dimensions: 9.2 x 8 x 7 cm (3.6 x 3.1 x 2.8 in)

IMPORTANT: This inlet is a connection point, not a pressure regulator. Use a pressure regulator between the campground spigot and your RV.

IV. Package Includes

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

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.