Vehicle RV City Water Inlet - Brass Black Flange with Check Valve - 3/4" NH Female Connection to 1/2" NPT Male Thread (Black)
RV city water inlet with black flange, check valve, mesh filter, mounting screws, and plumbing tape.
Dimensional diagram of RV city water inlet with brass flange and check valve showing product measurements.
RV city water inlet showing 3/4 inch NH female and 1/2 inch NPT male thread dimensions and standard design.
RV city water inlet diagram showing check valve function and stainless steel filter screen for debris prevention.
Comparison graphic showing durable low-lead brass RV water inlet valve core versus fragile plastic alternative.
RV city water inlet with black flange and included accessories like dust plug, Teflon tape, filter screen, and screws.
Four-step installation guide for RV city water inlet with black flange and brass check valve.
RV city water inlet with black flange and brass check valve shown in a collage with various recreational vehicles.
RV city water inlet with black flange, check valve, mesh filter, mounting screws, and plumbing tape.
Dimensional diagram of RV city water inlet with brass flange and check valve showing product measurements.
RV city water inlet showing 3/4 inch NH female and 1/2 inch NPT male thread dimensions and standard design.
RV city water inlet diagram showing check valve function and stainless steel filter screen for debris prevention.
Comparison graphic showing durable low-lead brass RV water inlet valve core versus fragile plastic alternative.
RV city water inlet with black flange and included accessories like dust plug, Teflon tape, filter screen, and screws.
Four-step installation guide for RV city water inlet with black flange and brass check valve.
RV city water inlet with black flange and brass check valve shown in a collage with various recreational vehicles.

RV City Water Inlet - Brass Black Flange with Check Valve - 3/4" NH Female Connection to 1/2" NPT Male Thread (Black)

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RV City Water Inlet - Brass with Black Flange and Check Valve

Key Features

  • Inlet connection: 3/4" NH (GHT) female swivel, accepts any standard US garden hose without adapters
  • Outlet connection: 1/2" NPT male thread, connects directly to standard RV fresh water plumbing fittings
  • Integrated brass check valve prevents backflow from the RV's fresh water tank to the external hose connection; protects against contamination during disconnection
  • Valve body constructed from lead-free brass; safe for potable/drinking water systems
  • Black mounting flange constructed from durable UV-resistant plastic; approximately 3" diameter for standard surface-mount installation
  • Easy-grip knob allows tool-free hose attachment and detachment
  • Includes press-in rubber dust cap to seal the inlet port and exclude debris, road grit, and insects when not connected to a water source

Specifications

  • Inlet thread: 3/4" NH (National Hose) / GHT female, swivel
  • Outlet thread: 1/2" NPT male
  • Flange diameter: approximately 3 inches
  • Flange color: black
  • Valve body material: lead-free brass
  • Flange material: UV-resistant plastic
  • Mounting: surface-mount, screw-flange style

Compatibility & Fitment

  • Fits most Class A, Class B, and Class C motorhomes; fifth-wheel and bumper-pull travel trailers; toy haulers; and camper vans with a standard 3" round flange cutout
  • Compatible with any RV or marine fresh water plumbing system using a 1/2" NPT female interior connection
  • Accepts all standard US garden hoses with 3/4" GHT/NH male fittings, no adapter required
  • Not compatible with metric-threaded hose fittings or systems requiring a 1/2" NPT female exterior connection
  • Verify existing flange cutout diameter and interior plumbing thread size before ordering

When to Replace

  • Water leaks from the flange face, hose connection point, or interior plumbing fitting under normal city water pressure
  • Check valve no longer holds, water flows backward out of the inlet when the hose is disconnected
  • Flange shows visible cracks, UV degradation, or brittleness that compromises the weather seal against the vehicle exterior
  • Hose threads are stripped or cross-threaded, preventing a secure hose connection
  • Dust cap is missing or no longer seals, allowing debris into the inlet port
  • Corrosion or mineral buildup on the brass valve body restricts water flow

Installation Tips

  • Shut off the city water supply and relieve any pressure in the RV's plumbing before removing the old inlet.
  • Disconnect the interior 1/2" NPT plumbing line first, then unscrew or unclip the exterior flange from the vehicle sidewall.
  • Remove all old sealant residue from the mounting surface before fitting the new flange, a clean surface is required for a watertight seal.
  • Apply PTFE (Teflon) thread seal tape to the 1/2" NPT male outlet threads before threading into the interior plumbing fitting; 2–3 wraps in the direction of thread engagement is sufficient.
  • Apply a continuous bead of non-leveling RV lap sealant or butyl tape around the back of the flange before pressing it against the vehicle wall; this creates the primary weather seal against moisture intrusion.
  • Secure the flange with the provided screws, snug firmly but do not overtighten, as this can crack the flange or distort the sealant bead.
  • Pressurize the system and inspect all connection points: interior NPT joint, flange perimeter, and hose swivel — for leaks before closing the access panel or compartment.
RV City Water Inlet - Brass Black Flange with Check Valve - 3/4" NH Female Connection to 1/2" NPT Male Thread (Black) 1
RV City Water Inlet - Brass Black Flange with Check Valve - 3/4" NH Female Connection to 1/2" NPT Male Thread (Black) 2
RV City Water Inlet - Brass Black Flange with Check Valve - 3/4" NH Female Connection to 1/2" NPT Male Thread (Black) 3
RV City Water Inlet - Brass Black Flange with Check Valve - 3/4" NH Female Connection to 1/2" NPT Male Thread (Black) 4
RV City Water Inlet - Brass Black Flange with Check Valve - 3/4" NH Female Connection to 1/2" NPT Male Thread (Black) 5
RV City Water Inlet - Brass Black Flange with Check Valve - 3/4" NH Female Connection to 1/2" NPT Male Thread (Black) 6
RV CITY WATER INLET

RV CITY WATER INLET

Enjoy cleaner water and smoother travels

Compatible Models

Locate the model number of your appliance or equipment on the manufacturer's label and use it to check compatibility before ordering

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FAQs

This is a city water inlet for an RV or camper’s pressurized water connection. It has a 3/4 inch NH female garden-hose style connection on the outside and a 1/2 inch NPT male thread on the back side for plumbing into the RV’s water system.
Yes. The 3/4 inch NH female connection is the standard hose-thread style commonly used for RV city water hookups and campground supply hoses. Be sure your hose uses standard garden-hose threads and not pipe threads.
The check valve helps prevent water from flowing back out through the city water inlet when the RV’s plumbing system is pressurized. This is important for controlling backflow and for keeping onboard pump pressure from pushing water out of the inlet connection.
Typical symptoms include leaking around the inlet body, dripping from the hose connection after hookup, water spraying from cracks in the flange or housing, or water flowing back out of the inlet because the check valve no longer seals properly. Damaged threads and persistent connection leaks are also common reasons for replacement.
Installation is usually straightforward if you have access to the back of the inlet. Typical tools and supplies include a screwdriver, adjustable wrench or pliers, thread sealant or PTFE tape rated for potable water on the 1/2 inch NPT connection, and possibly fresh mounting screws or sealant for the flange. For many RVs, the job takes about 20 to 45 minutes.
Turn off the water supply, disconnect any hose, and relieve pressure in the plumbing system first. Check the mounting cutout, inspect the connected water line or fitting for cracks, and make sure the old sealant or gasket material is fully cleaned off before installing the new inlet. If the previous inlet leaked, also inspect the surrounding wall for water damage.
Common causes include freezing damage, overtightening of hose fittings, UV exposure, worn internal check valves, and mineral buildup from hard water. Cross-threading the hose connection or using high water pressure without a regulator can also shorten the life of the inlet.