A small freshwater leak inside an RV can become a surprisingly expensive problem.
A loose fitting beneath the kitchen sink, dripping water-pump connection, damaged faucet line, leaking low-point drain, or cracked plumbing fitting may release only a few drops at first.
But those drops can soak into:
- Cabinetry
- Flooring
- Insulation
- Wall panels
- Subfloor
- Electrical compartments
- Furniture
Because much of an RV plumbing system is hidden behind cabinets, walls, and storage compartments, a leak may continue for days before it becomes obvious.
The good news is that many freshwater-system leaks can be traced to relatively simple problems such as loose threaded fittings, worn washers, cracked connectors, or fittings that loosened during travel.
The key is finding the source quickly and shutting down the water supply before damage spreads.
This guide explains how to locate common RV freshwater leaks, which simple repairs may be appropriate for owners, and when a leak requires professional plumbing service.
Understand Your RV Freshwater System
Before searching for a leak, it helps to understand how water moves through the RV.
Most freshwater systems include:
- Freshwater holding tank
- 12-volt water pump
- Pump strainer
- City-water inlet
- Water lines
- Faucets
- Shower
- Toilet
- Water heater
- Outdoor shower
- Low-point drains
- Winterization valves
- Water filter
- Check valves
- Pressure regulator, when used
Depending on the RV, plumbing may use:
- PEX tubing
- Flexible reinforced hose
- Braided faucet supply lines
- Plastic fittings
- Brass fittings
The exact layout varies by manufacturer and model.
First: Stop the Water
When you discover an active leak, stop the water source before troubleshooting.
If you are using the freshwater tank:
- Turn off the water pump.
- Open a faucet briefly to relieve pressure.
If you are connected to campground water:
- Turn off the water at the campground spigot.
- Disconnect or depressurize the hose.
- Open a faucet to relieve trapped pressure.
Do not continue running the system just to see how bad the leak becomes.
Even a small pressurized leak can release substantial water over time.
Determine Whether It Is Fresh Water or Something Else
Not every wet spot inside an RV comes from the freshwater plumbing.
Water may also enter from:
- Roof leak
- Window leak
- Windshield leak
- Air-conditioner condensation
- Refrigerator drain
- Shower enclosure
- Waste plumbing
- Exterior storage compartment
- Slide-out seal
Freshwater-system leaks often appear when:
- Water pump is running
- City water is connected
- Faucet is being used
- Water heater is full
- Toilet is flushed
If moisture appears only during rain, the problem may involve the RV exterior rather than the plumbing.
1. Listen to the Water Pump
One of the easiest ways to identify a hidden freshwater leak is to listen to the pump.
With all faucets and water-using fixtures closed, the pump should pressurize the system and stop.
If it periodically turns on again without anyone using water, pressure is being lost somewhere.
Possible causes include:
- Plumbing leak
- Dripping faucet
- Leaking toilet valve
- Pump check-valve problem
- Water-heater leak
- Loose connection
Pentair Shurflo troubleshooting guidance specifically recommends checking pressure-side plumbing, valves, and the toilet when a pump runs while all fixtures are closed.
A pump cycling occasionally is therefore a useful warning sign.
2. Check Under Every Sink
Start with the easiest plumbing connections to reach.
Open cabinets beneath:
- Kitchen sink
- Bathroom sink
- Outdoor kitchen sink
Use a flashlight.
Look for:
- Water droplets
- Dampness
- Mineral deposits
- Wet cabinet floor
- Swollen wood
- Staining
Run both hot and cold water while watching the connections.
Common leak points include:
- Faucet supply lines
- Threaded fittings
- PEX connectors
- Faucet body
- Sprayer hose
Sometimes a leak appears only while the faucet is operating.
3. Dry Everything Before Troubleshooting
If several surfaces are wet, determining the original source becomes difficult.
Use:
- Towels
- Paper towels
- Dry cloth
to completely dry the area.
Then repressurize the system briefly and watch for the first place moisture appears.
A dry paper towel placed beneath a fitting can make a very slow drip easier to detect.
4. Check Threaded Faucet Connections
Many RV faucets connect to supply lines using threaded plastic or metal fittings.
Road vibration may gradually loosen them.
If you find a slightly loose threaded connection, hand-tightening may stop the leak.
Use caution.
Plastic fittings can crack when overtightened.
Do not automatically use pliers to tighten every fitting as hard as possible.
If the connection remains wet after careful tightening, the washer or fitting may be damaged.
5. Inspect Faucet Supply Hoses
Flexible faucet lines can leak around:
- Crimped ends
- Threaded connections
- Hose body
Run your fingers along the hose while the system is pressurized.
Replace a hose that shows:
- Cracking
- Bulging
- Severe corrosion
- Damaged end fitting
- Active seepage
Do not attempt to permanently repair a pressurized supply hose with household tape.
6. Inspect the Faucet Itself
Sometimes the plumbing is fine and the faucet is leaking internally.
Look around:
- Handle
- Base
- Spout
- Pull-out sprayer
- Hose connection
Water leaking from the base of the faucet can run underneath the countertop and appear to be a plumbing-line leak.
A damaged cartridge, O-ring, or faucet body may require replacement.
7. Check the Shower Connections
RV showers have several potential leak points.
Inspect:
- Showerhead
- Hose
- Faucet valve
- Supply connections
- Vacuum breaker
- Wall fittings
A shower hose may leak only while water is flowing.
Dry the area, turn the shower on briefly, and inspect each connection.
8. Make Sure It Is Not the Shower Enclosure
Water around a shower does not automatically mean the freshwater line is leaking.
Check:
- Shower door seal
- Wall seams
- Caulk
- Shower pan
- Drain
If water appears only while someone is showering, but the pressurized plumbing remains dry when the shower is off, the enclosure may be the source.
9. Check the Toilet Water Connection
The toilet is another common place for freshwater leaks.
Inspect behind or beside the toilet for:
- Damp flooring
- Dripping supply line
- Wet valve
- Loose fitting
Flush the toilet while watching the connection.
A leak may occur only while the valve is open.
If the toilet valve itself is cracked or dripping, replace the appropriate part according to the toilet manufacturer’s instructions.
10. Inspect the Water Pump
Locate the RV freshwater pump.
It may be installed:
- Beneath a bed
- Under a dinette
- Inside a cabinet
- In a basement compartment
- Near the freshwater tank
Inspect around:
- Inlet
- Outlet
- Pump head
- Strainer
- Hose fittings
Pentair Shurflo’s troubleshooting documentation specifically identifies leaks from the pump head or pressure switch as possible pump-related problems.
Look for evidence of water beneath the pump.
11. Check the Pump Strainer
Many pumps have a small transparent strainer on the inlet side.
Inspect it for:
- Cracked housing
- Loose cap
- Damaged seal
- Debris
- Water seepage
If the strainer was removed for winterizing or cleaning, its gasket may not be seated correctly.
Do not overtighten a plastic strainer housing.
A cracked housing should be replaced.
12. Check Pump Inlet and Outlet Fittings
Driving vibration can loosen freshwater-system hardware.
Pentair specifically notes that vibration from travel can loosen plumbing, strainers, and pump hardware.
Inspect both pump connections.
A leak at one of these fittings may be easy to repair compared with replacing the pump.
Before tightening anything, turn off the pump and relieve system pressure.
13. Inspect Flexible Pump Hoses
Many RVs use flexible hose near the pump to reduce vibration.
Look for:
- Cracks
- Kinks
- Abrasion
- Loose clamps
- Leaking fittings
A hose rubbing against:
- Cabinet edge
- Metal bracket
- Screw
can eventually develop a hole.
Correct the rubbing point before replacing the hose.
14. Check PEX Connections
PEX tubing is widely used in RV freshwater systems.
Connections may use:
- Crimp rings
- Clamp rings
- Push-to-connect fittings
- Threaded adapters
Check each accessible connection for moisture.
A leaking crimped PEX connection normally requires the proper fitting and installation tool.
Do not attempt to repair a damaged crimp ring by squeezing it randomly with ordinary pliers.
15. Look for Cracked Plastic Fittings
The tubing itself is often durable.
Plastic elbows, tees, adapters, and threaded connectors can be more vulnerable to:
- Freezing
- Overtightening
- Age
- Vibration
- Impact
Use a flashlight and inspect fittings closely.
Hairline cracks may open only when the system is under pressure.
16. Replace Cracked Fittings Instead of Gluing Them
A cracked pressurized freshwater fitting should generally be replaced.
Trying to permanently repair it using:
- Super glue
- Epoxy
- Tape
- Household caulk
may provide only temporary protection.
The fitting must withstand repeated pressure cycles and road vibration.
Use a replacement rated for potable-water plumbing and compatible with the existing tubing.
17. Inspect Push-to-Connect Fittings Carefully
Some RVs or previous repairs may use push-to-connect plumbing fittings.
If one leaks, possible causes include:
- Tubing not fully inserted
- Damaged O-ring
- Scratched tubing
- Angled cut
- Debris inside fitting
Turn off water pressure before removing it.
Follow the fitting manufacturer’s installation procedure exactly.
The tubing typically needs a clean, square end.
18. Check the City-Water Inlet
If the leak occurs only when connected to campground water, inspect the city-water inlet.
Look around:
- Hose connection
- Inlet fitting
- Interior plumbing connection
- Check valve
- Mounting flange
Water may leak behind the exterior inlet and enter the RV wall.
If the exterior connection moves when the hose is attached, inspect the mounting hardware too.
19. Use a Water-Pressure Regulator
Campground water pressure varies.
Some locations may provide more pressure than an RV plumbing system should receive.
Use a regulator designed for RV potable-water systems and set or select it according to your RV manufacturer’s specifications.
Excessive pressure can stress:
- Fittings
- Faucet lines
- Toilet valves
- Water-heater connections
A regulator is inexpensive compared with repairing water-damaged cabinetry or flooring.
20. Inspect the Freshwater Fill
If your RV has a gravity freshwater fill, inspect:
- Fill hose
- Vent hose
- Clamps
- Exterior connection
If water appears only while filling the tank, the problem may involve the fill system rather than the pressurized plumbing.
A cracked fill hose can dump water directly into an enclosed wall or storage area.
21. Inspect the Freshwater Tank
Freshwater tanks can leak from:
- Drain fitting
- Outlet connection
- Vent
- Fill connection
- Tank body
Inspect the tank while it contains water.
Look for drips beneath the RV or in the compartment containing the tank.
If the tank itself is cracked, it may require professional repair or replacement.
22. Check the Tank Drain Valve
A freshwater tank drain may:
- Drip
- Fail to close
- Develop a cracked body
- Leak around its threaded connection
Make sure the valve is fully closed.
If it continues leaking, inspect the valve rather than applying excessive force.
Plastic valves can break.
23. Check the Low-Point Drains
RV freshwater systems often have low-point drains for emptying hot and cold plumbing lines.
Winnebago’s owner documentation, for example, directs owners to open low-point drain valves when draining the freshwater system.
If one of these valves or caps is not fully closed after winterizing, water may leak whenever the system is pressurized.
Locate the drains and verify:
- Caps are installed
- Valves are closed
- Fittings are undamaged
24. Check Winterization Valves
If the RV was recently taken out of storage, inspect the winterization system.
Possible issues include:
- Valve left partly open
- Loose hose
- Cracked fitting
- Incorrect valve position
A valve accidentally left in the winterization position can also cause the pump to pull air instead of water.
25. Inspect the Water Heater Connections
The water heater is connected to both hot and cold plumbing.
Inspect around:
- Cold-water inlet
- Hot-water outlet
- Bypass valves
- PEX fittings
- Relief valve area
- Tank connections
If the leak occurs only after the water heater reaches temperature, thermal expansion or a failing component may be involved.
Do not work on the water heater while it is hot or pressurized.
26. Do Not Remove the Water-Heater Plug While Hot
Before draining or servicing the water heater:
- Turn off heat sources
- Allow water to cool
- Turn off water pressure
- Relieve pressure according to manufacturer instructions
Hot pressurized water can cause serious burns.
Follow the exact water-heater manual for your model.
27. Check Water-Heater Bypass Valves
Many RVs have a bypass system used during winterizing.
These valves may be located behind:
- Interior access panel
- Cabinet
- Water heater
Look for leaks at the valve body and nearby fittings.
Plastic bypass fittings can crack after freezing.
28. Inspect the Pressure-Relief Valve Carefully
A small amount of water around a water-heater pressure-relief valve does not always mean the same thing as a plumbing-line leak.
Never plug or permanently seal a pressure-relief valve.
It is a safety device.
If it repeatedly leaks, consult the water-heater manufacturer’s troubleshooting procedure or have it inspected professionally.
29. Check Outdoor Shower Connections
Exterior showers are frequently exposed to freezing temperatures.
Inspect:
- Faucet body
- Hose
- Sprayer
- Interior connections behind the fixture
If a leak appears inside the wall after winter storage, an exterior shower fitting may have cracked.
This can be easy to overlook because the faucet itself is outside.
30. Check the Ice Maker or Refrigerator Water Line
Some larger motorhomes have refrigerators with:
- Ice makers
- Water dispensers
These add another freshwater branch.
Inspect accessible tubing and connections behind the refrigerator.
A small refrigerator supply line can leak slowly for a long time before becoming visible.
31. Inspect Water Filters
An RV water filter may leak if:
- Housing is cracked
- O-ring is damaged
- Housing is loose
- Cartridge was installed incorrectly
Check the filter after:
- Replacing cartridge
- Winterizing
- De-winterizing
Plastic housings damaged by freezing should be replaced.
32. Check Filter O-Rings
If a filter housing leaks around its cap, depressurize the system and inspect the O-ring.
Look for:
- Twisting
- Cracks
- Flat spots
- Dirt
Use only lubricant approved by the filter manufacturer if lubrication is required.
Petroleum products can damage some rubber seals.
33. Follow the Sound of the Leak
A pressurized plumbing leak may produce:
- Hissing
- Spraying
- Dripping
Turn off:
- Television
- Air conditioner
- Fans
and listen.
A quiet RV makes small leaks easier to locate.
Do not leave a suspected leak pressurized for long periods while searching.
34. Look for Mineral Deposits
A leak may stop temporarily before you inspect it.
Previous seepage may leave:
- White scale
- Green staining
- Rust
- Water marks
around a connection.
These deposits can help identify intermittent leaks.
Clean the area and monitor it after repairs.
35. Check Beneath Cabinets
Water follows gravity but not always a straight path.
A leak behind a faucet may travel along:
- Pipe
- Wire
- Cabinet frame
before dripping onto the floor.
Inspect higher than the visible wet area.
The puddle is not always directly beneath the failed fitting.
36. Inspect Basement Compartments
Large Class A motorhomes may route plumbing through basement storage areas.
Check compartments containing:
- Wet bay
- Water pump
- Water filter
- Tank valves
- Outdoor shower
- Hose reel
Look behind removable panels if the RV manufacturer provides safe service access.
Do not dismantle structural panels without knowing what is behind them.
37. Check the Wet Bay
A wet bay contains several plumbing components in one location.
Possible leak sources include:
- Hose reel
- City-water valve
- Tank-fill valve
- Outdoor faucet
- Winterization valve
- Filter
- Low-point drain
- PEX connections
Dry the entire bay first.
Then pressurize the system briefly and inspect connections individually.
38. Look for Leaks When Switching Between Tank and City Water
A problem may occur in only one operating mode.
Test separately:
Freshwater Tank + Pump
If the leak appears only here, investigate:
- Pump
- Pump fittings
- Tank outlet
- Suction line
City Water
If the leak appears only here, inspect:
- City-water inlet
- Check valve
- Pressure regulator
- High-pressure side fittings
Testing modes separately can dramatically narrow the search.
39. Do Not Assume the Pump Is Bad Because It Runs Frequently
A cycling pump may simply be responding to lost system pressure.
Pentair Shurflo recommends checking pressure-side plumbing, valves, and the toilet when a pump starts while fixtures are closed.
Find the leak before replacing the pump.
Otherwise, the new pump may behave exactly the same way.
40. Watch for Air in the System
A faucet that sputters may indicate:
- Air after filling
- Low freshwater level
- Suction-side leak
- Loose pump inlet
- Clogged strainer
Pentair lists inlet-side air leaks and clogged strainers among possible reasons an RV pump may fail to prime or sputter.
Inspect the pump inlet side before assuming there is a major plumbing failure.
41. Tighten Hose Clamps Carefully
Some RV freshwater hoses use clamps.
If a clamp is loose, tightening it slightly may stop seepage.
However:
- Do not crush the hose
- Do not overtighten plastic fittings
- Replace rusted clamps
- Replace damaged hose
If the hose end has hardened or split, tightening the clamp further may make the problem worse.
42. Use Potable-Water-Safe Replacement Parts
Freshwater plumbing carries water used for:
- Drinking
- Cooking
- Washing
Use fittings, tubing, adhesives, sealants, and replacement components specifically rated for potable-water systems and the required pressure and temperature.
Do not use random household repair materials simply because they stop water.
43. Be Careful With Thread-Sealing Products
Some threaded plumbing connections require:
- Thread sealant
- PTFE tape
- Washer
- O-ring
Others rely on a sealing surface and should not receive thread tape.
Check the component instructions.
Adding large amounts of tape to a fitting that seals with a washer can damage the fitting or prevent proper seating.
44. Never Overtighten Plastic Threads
Plastic fittings are common because they are lightweight and corrosion-resistant.
They can also crack.
Overtightening may create a hairline fracture that becomes a leak after the plumbing is pressurized.
Tighten according to the fitting manufacturer’s instructions.
More force is not always better.
45. Temporary Repairs Are Not Permanent Repairs
Emergency products may help reduce water loss until you reach a repair facility.
But a temporary repair should not become permanent simply because it stopped dripping.
Avoid relying long-term on:
- Duct tape
- Electrical tape
- Household caulk
- Epoxy putty on pressurized fittings
Replace the damaged part properly.
46. Check for Freeze Damage
After winter storage, inspect the system carefully before fully pressurizing it.
Freeze damage may affect:
- Faucet valves
- PEX fittings
- Filter housings
- Pump strainers
- Shower fixtures
- Toilet valves
- Water heater
- Outdoor shower
Bring pressure up while inspecting the system rather than turning the pump on and immediately walking away.
47. Winterize Before Freezing Weather
Water expands when it freezes.
RV plumbing should be winterized according to the RV manufacturer’s instructions before exposure to freezing conditions.
The procedure may involve:
- Draining freshwater tank
- Draining low-point lines
- Draining water heater
- Bypassing water heater
- Using RV antifreeze
Never assume simply draining the freshwater tank empties every plumbing component.
48. Sanitize the Freshwater System
Leak repair and freshwater hygiene are separate issues, but system maintenance matters.
Pentair lists normal sanitizing, winterizing, strainer cleaning, and periodic checking of plumbing hardware and fittings as regular pump maintenance.
Follow your RV manufacturer’s approved sanitization procedure.
Use only appropriate products and concentrations.
49. Dry Wet Areas Immediately
Once the leak has been stopped, remove moisture.
Use appropriate ventilation and drying methods.
Check:
- Carpet
- Cabinet bottoms
- Wall panels
- Insulation
- Storage compartments
Do not simply close the cabinet and assume everything will dry.
Trapped moisture can produce:
- Mold
- Odor
- Swelling
- Delamination
50. Check for Damage After the Leak
Even a repaired plumbing fitting can leave hidden damage behind.
Look for:
- Soft wood
- Warped floor
- Peeling laminate
- Swollen cabinetry
- Musty smell
- Mold
- Staining
If substantial water entered the floor or wall, professional moisture inspection may be needed.
Could the “Plumbing Leak” Actually Be an RV Window Leak?
Water around a kitchen sink, dinette, bed, or bathroom cabinet can be misleading.
If a window sits above the wet area, inspect it closely.
A failed RV window seal may allow rainwater to enter the wall and travel downward until it reaches:
- Cabinet
- Countertop
- Floor
Look around the window for:
- Water stains
- Damp wall material
- Loose frame
- Cracked glass
- Damaged seal
- Fogging
RV Glass Guru provides nationwide RV window repair and replacement for cracked, broken, foggy, leaking, single-pane, dual-pane, and other RV windows.
Check the Windshield When Water Appears Near the Dash
A wet dashboard or front floor may be incorrectly blamed on:
- Heater system
- Plumbing
- Air conditioning
when water is actually entering around the windshield.
Inspect for:
- Loose molding
- Damaged gasket
- Separation
- Rust around frame
- Cracks
- Water trails around A-pillars
How to Tell a Glass Leak From a Freshwater Leak
More Likely Freshwater Plumbing
- Happens when pump is on
- Happens when city water is connected
- Stops when water system is depressurized
- Water appears near pipes or fittings
- Pump cycles with fixtures closed
More Likely Exterior or Glass Leak
- Happens during rain
- Appears after washing RV
- Water tracks down wall
- Moisture surrounds window
- Windshield area becomes wet
- Plumbing remains dry when pressurized
In some situations, both problems may exist.
Test each system separately.
A Quick RV Freshwater Leak Checklist
If you discover water inside the RV:
Step 1: Shut Off Water
Turn off pump or campground supply.
Step 2: Relieve Pressure
Open a faucet briefly.
Step 3: Dry the Area
Remove existing moisture.
Step 4: Check Visible Connections
Start under sinks and around toilets.
Step 5: Inspect the Water Pump
Check pump head, strainer, inlet, and outlet.
Step 6: Inspect the Wet Bay
Check city-water and tank-fill components.
Step 7: Check the Water Heater
Inspect lines and bypass fittings.
Step 8: Inspect Low-Point Drains
Make sure caps and valves are closed.
Step 9: Test Tank and City-Water Modes Separately
Determine when the leak occurs.
Step 10: Check Nearby Glass
If the leak appears during rain rather than plumbing use, inspect the windows and windshield.
RV Freshwater Leak Mistakes to Avoid
Leaving the Pump On While Away
A small leak can become major water damage if the pump continues repressurizing the system.
Increasing Campground Water Pressure
Higher pressure will not improve a leaking plumbing system.
Overtightening Plastic Fittings
This can create cracks.
Repeatedly Replacing Pump Parts
A cycling pump may actually indicate a plumbing leak.
Permanently Repairing Fittings With Tape
Replace damaged pressurized components.
Ignoring Small Drips
Small leaks can damage hidden materials.
Assuming Every Wet Wall Is Plumbing Related
Rainwater can enter through windows or exterior seals.
Ignoring Freeze Damage
Several fittings may fail at once after inadequate winterization.
When Should You Call an RV Technician?
Professional plumbing service is appropriate when you find:
- Hidden leak inside wall
- Damaged PEX requiring specialized tools
- Cracked freshwater tank
- Major water-heater leak
- Repeated pump problems
- Persistent pressure loss
- Significant freeze damage
- Water near electrical systems
- Wet structural materials
- Mold
- Extensive flooring damage
You should also seek professional help when you cannot safely access the plumbing.
Cutting into walls or flooring without understanding the RV construction can create a much larger repair.
When Should You Call an RV Glass Specialist?
Contact an RV glass professional when moisture is related to:
- Leaking windshield
- Loose windshield gasket
- Cracked windshield
- Leaking RV window
- Damaged window seal
- Foggy dual-pane glass
- Loose window frame
- Broken side window
RV Glass Guru specializes in nationwide RV windshield and window service, with mobile and in-shop options available across the United States.
Stop Freshwater Leaks Before They Become Water Damage
Most RV freshwater leaks are easier to repair when found early.
Listen for a pump that cycles when no water is being used.
Inspect under sinks, around the toilet, behind the shower, near the water heater, inside the wet bay, and around the pump.
Pay particular attention after:
- Long trips
- Winter storage
- De-winterizing
- Replacing a water filter
- Plumbing repairs
Travel vibration can loosen plumbing hardware, while freezing can damage fittings and valves.
If you find a loose accessible connection, correcting it early may prevent serious damage.
If you discover cracked fittings, damaged PEX connections, hidden leaks, or water around electrical equipment, stop the water supply and call a qualified RV technician.
And remember: water inside an RV does not always come from the freshwater system.
If moisture appears around a window, wall, dashboard, or windshield after rain, the problem may involve the RV glass installation rather than the plumbing.
RV Glass Guru provides mobile and in-shop RV glass service nationwide, with technicians servicing Class A, Class B, and Class C motorhomes across all 50 states.
For cracked windshields, leaking glass, foggy RV windows, failed seals, or replacement service, contact RV Glass Guru for a free quote at (888) 839-4218.
Frequently Asked Questions
Why does my RV water pump keep turning on when no faucets are open?
The system may be losing pressure because of a plumbing leak, dripping fixture, leaking toilet valve, or pump/check-valve problem.
What is the most common place for an RV freshwater leak?
Common areas include faucet supply lines, pump fittings, PEX connections, toilets, water-heater bypass fittings, low-point drains, and wet-bay components.
Can I tighten an RV plumbing fitting that is leaking?
An accessible threaded fitting may simply be loose, but tighten it carefully. Plastic components can crack when overtightened.
Can I repair a leaking PEX connection myself?
Some PEX repairs require special crimping or clamping tools. If you do not have the correct system-specific tools and fittings, professional repair is safer.
Why does my RV leak only when connected to city water?
Inspect the city-water inlet, pressure regulator, check valve, and pressurized plumbing. Campground pressure may also be higher than your pump normally produces.
Should I use a water-pressure regulator at an RV park?
Yes, when recommended for your RV. A suitable RV water-pressure regulator can help protect plumbing from excessive campground pressure.
Why is my freshwater pump leaking?
Possible causes include loose fittings, a cracked strainer, damaged pump head, pressure-switch leakage, or freeze damage.
Why does my faucet sputter when the RV water pump is running?
Possible causes include air in the system, low tank level, a pump inlet leak, clogged strainer, or restricted plumbing.
Can freezing cause RV freshwater leaks?
Yes. Water left in fittings, faucets, filter housings, pumps, or other components can expand when frozen and crack them.
Can I use duct tape to repair a leaking RV water line?
It may slow some emergency leaks temporarily, but it is not a reliable permanent repair for pressurized potable-water plumbing.
Why is there water under my RV window when the plumbing is dry?
The moisture may be entering around the window frame or seal rather than from the freshwater system. Check whether it appears during or after rain.
Does RV Glass Guru repair freshwater plumbing?
RV Glass Guru specializes in RV windshield and window repair and replacement rather than freshwater plumbing. Plumbing-system leaks should be handled by a qualified RV service technician, while leaks associated with RV glass should be inspected by an RV glass specialist.