Mirone RV City Water Fill Inlet — Brass Flange with Check Valve, White 3" Flange, 1/2" Thread

Mirone's RV City Water Fill Inlet is a heavy-duty brass flange with an integrated check valve that lets you connect a standard garden hose to your camper, trailer, or boat quickly and securely.

This inlet replaces worn or corroded city water fill fittings and is built to withstand outdoor exposure while delivering a dependable, watertight connection. Constructed from brass and designed for fast installation, the Mirone inlet is sized to match most recreational vehicles and marine applications. It comes with threaded brass piping and a check valve to prevent backflow, plus a warranty and accessible customer support.

How does the Mirone inlet simplify water hookups?

The inlet lets you attach a standard garden hose to your RV or boat with minimal effort. Its pre-threaded brass pipe and common flange size mean most replacements slide in without new holes or custom adapters. The built-in check valve helps keep system pressure steady and prevents unwanted backflow into the hose or supply.

• 3-inch flange diameter fits standard openings and covers worn edges
• 1/2-inch inner threaded pipe accepts common hose fittings
• Brass construction resists rust and handles outdoor conditions
• Integrated check valve reduces risk of backflow

What tools and steps are needed to install it?

Installation is straightforward and typically requires only a screwdriver and plumber's tape. Remove the old inlet, seat the Mirone flange, hand-tighten the threaded section, then secure the flange with screws. Wrap Teflon tape on the threads for a reliable seal and avoid over-tightening to protect the brass threads.

• Screwdriver (flat or Phillips depending on screws)
• Plumber's (Teflon) tape for thread sealing
• Quick visual check for alignment before final fastening
• Replacement usually under 20 minutes for most RVs

Will this inlet work with my RV, trailer, or boat?

The flange is engineered for broad compatibility with recreational vehicles and marine fittings that accept a 3-inch flange and 1/2-inch threaded inlet. Because it uses common thread sizing, adapters are rarely needed. If your existing cutout is nonstandard, a simple measurement of the opening and thread pitch will confirm fit.

• Designed for most RV, camper, trailer, and marine city-water openings
• Standard garden-hose compatibility for common campground hookups
• Brass threads accommodate standard plumbing tape for a tight seal
• If unusual, measure flange diameter and thread size before ordering

How does the Mirone inlet hold up outdoors and over time?

Built from solid brass components, this inlet is less prone to corrosion than plated metal or plastic alternatives. The materials and simple mechanical design reduce failure points, and the included check valve helps protect your supply line. Mirone backs the product with a one-year warranty and customer service for straightforward replacements or support.

• Brass body resists rust and outdoor wear better than plastic
• Compact check valve protects against backflow and cross-contamination
• Simple threaded assembly is easy to maintain or replace if needed
• One-year warranty and responsive customer service from Mirone

Who is this for? The Mirone RV City Water Fill Inlet is ideal for RV owners, boaters, and trailer users who want a durable, easy-to-install replacement inlet that fits standard hookups. It's a practical pick for DIYers and maintenance pros who need a reliable brass flange with a check valve and straightforward compatibility for campground and marina water connections.