RV Plumbing Repair in Guntersville, Alabama
A water leak, a pump that won't build pressure, or a fixture that quit — water problems in an RV need to be found and fixed before they become structural problems. We trace plumbing issues to their source and repair them right.
Water Problems Don't Wait — and Neither Should You
A slow drip under the sink seems minor until you open a cabinet and find the floor soft. A pump that runs constantly seems like a nuisance until you realize it's been cycling all night because water is going somewhere it shouldn't. RV plumbing leaks cause water damage that spreads quietly through walls, floors, and structural components — and the repairs get more expensive the longer they go unaddressed.
RV plumbing systems are different from home plumbing. They use flexible PEX tubing, push-fit fittings, and 12V demand pumps — all designed for weight, vibration, and the stresses of travel. They crack at fittings from freeze damage, develop leaks at connections that vibrate loose over miles of road, and fail at fixtures that see heavy use in tight spaces.
We find where the water is going, fix the cause, and check the surrounding area for damage that may have already started. That's the difference between a plumbing repair and a plumbing repair that holds.
RV Plumbing Problems We Fix Every Week
RV plumbing covers three separate systems — fresh water in, gray water out from sinks and shower, and black water out from the toilet. Problems in any one of them affect your trip.
Water pump runs constantly
A pump that never stops cycling means it can't hold pressure — which means water is escaping somewhere. Could be a leak in the supply lines, a failed pressure switch, or a pump that's worn out and can no longer maintain pressure. We pressure-test the system to find where the water is going before replacing anything.
No water pressure or no water at all
If the pump runs but nothing comes out, the inlet screen may be clogged, a line may be kinked or frozen, or the pump itself has failed internally. If you're on city water and have no pressure, the pressure regulator or a failed inlet check valve is the likely cause. We diagnose which system is feeding the problem before recommending a fix.
Visible leak or wet cabinet
Water under the sink, moisture in a cabinet, or a wet spot on the floor or wall. Push-fit fittings can back out. Flexible lines crack at bends. Connections behind walls fail from vibration. We locate the source — even when it's behind a wall — and repair it before the surrounding wood is compromised.
Water heater leaking or not producing hot water
The water heater is part of the plumbing system. A leaking pressure relief valve, a corroded tank fitting, or a failed bypass valve all fall in this category. If you have hot water but low pressure only on the hot side, there's a restriction in the hot water line or at the heater itself. See our water heater page for specific water heater issues.
Toilet won't hold water or seal
An RV toilet that won't hold water in the bowl has a failed foot pedal seal or blade seal. Water on the floor around the base means the floor seal has failed. Both are repairable without replacing the toilet in most cases. A toilet that won't flush completely is usually a water supply issue — low pressure or a clogged spray nozzle.
Dump valve won't open or won't seal
A stuck dump valve — either stuck open or stuck closed — is a problem that doesn't improve on its own. Waste buildup, corrosion, and UV damage all cause valve failures. A valve that won't seal means your holding tank is draining when it shouldn't be. We service and replace gray and black water dump valves on all RV types.
Understanding Your Three Water Systems
Every RV has three separate plumbing systems. A problem in one doesn't always mean the others are affected — but they can interact in ways that make diagnosis tricky.
Fresh Water System
Supplies clean water to every faucet, shower, and toilet in your RV. Can be fed by the onboard fresh water tank (with the 12V demand pump) or by city water pressure through the inlet port. Common failures: pump failure, freeze cracked fittings, kinked lines, failed check valves, and clogged screens.
Key components: Fresh water tank, demand pump, pressure regulator, water filter, lines, and all supply fittings.
Gray Water System
Collects wastewater from sinks and the shower and holds it in the gray tank until you dump. Gray water is relatively clean compared to black water. Common failures: clogged drains, failed P-traps that allow sewer gas back in, cracked drain lines, and dump valves that don't fully seal.
Key components: Gray holding tank, drain lines, P-traps, vent stack, and dump valve.
Black Water System
Handles toilet waste and holds it in the black tank. Requires proper venting to prevent odor and pressure buildup. Common failures: toilet seal failure, cracked tank, failed or stuck dump valve, clogged vent pipe, and sensor failures that give false readings.
Key components: Black holding tank, toilet, flush line, vent pipe, dump valve, and tank sensors.
Freeze Damage — The Hidden Plumbing Problem
Alabama doesn't freeze like the northern states, but hard freezes happen every winter. One night at 20 degrees with water sitting in your lines is enough to crack fittings, split the fresh water tank, or burst the water heater tank. The damage isn't always obvious until you use the system again in spring.
Signs of Freeze Damage
No water pressure after a freeze even though the pump runs.
Water visible under the RV or in cabinets after the first spring use.
Fittings visibly cracked or separated at joints.
Water heater making unusual sounds or leaking from the bottom.
What We Do
Pressure test the full system to find every failure point before repair.
Replace cracked fittings, split lines, and damaged valves.
Inspect the water heater tank and surrounding area for damage.
Perform winterization to prevent it from happening again.
We also perform winterization in the fall and dewinterization in the spring — protecting your system and confirming it's ready before the season starts.
Why RV Owners Trust Us With Their Plumbing
National Champion of RV Techs®
Our founder is the 2-time RVIA Top Tech and co-creator of the RVTI certification program. That expertise is behind every diagnosis we make.
We Find the Source
We pressure test the system and trace the problem to its actual source — not just the symptom that's visible. Water damage that's already started gets addressed, not ignored.
Parts in Stock
We stock common fittings, pump components, valves, and toilet seals. Most plumbing repairs don't require waiting on a parts order.
RV Plumbing Questions We Hear Every Day
If the pump runs continuously but pressure never builds, the most common causes are a leak somewhere in the system that the pump can't overcome, a failed pump that is running but not building pressure, or a clogged inlet screen. Turn off the pump and check all visible connections and fittings for moisture. If the pump runs for a few seconds and then stops cycling, pressure is holding and the system is likely fine. If it never stops running, trace the line for leaks before assuming the pump is bad.
Start by turning on the water pump with all fixtures closed. If the pump cycles on and off repeatedly, you have a leak. Check under sinks, behind the toilet, around the water heater, and at every fitting and connection you can access. Soft spots in the floor or walls near plumbing lines often indicate a slow leak that has been going on longer than you realize. RV plumbing uses plastic fittings and flexible tubing that can crack from freeze damage, age, or vibration. Some leaks are behind walls and require partial disassembly to locate.
A sulfur or rotten egg smell usually comes from bacteria growth in the fresh water tank, especially after the RV sits unused. The fix is sanitizing the tank and lines with a diluted bleach solution, then flushing completely. A rotten egg smell specifically from the hot water side only can indicate sulfur bacteria in the water heater tank reacting with the anode rod — common with certain water sources. We can sanitize your system and advise on whether the anode rod needs replacement.
Winterization is the process of removing water from your RV's plumbing system and replacing it with RV antifreeze or using compressed air to blow out the lines — preventing freeze damage when temperatures drop below 32 degrees. In Alabama, hard freezes are less common than in northern states, but they do happen. A single hard freeze with water sitting in your lines can crack fittings, burst the water heater tank, or split the fresh water tank. If your RV will sit unused through winter months, winterization is the right call. We perform both winterization and dewinterization in the spring.
Yes. We service the full RV plumbing system including gray water (sinks and shower drain) and black water (toilet and holding tank) systems. Common issues include failed dump valves that won't seal or open, cracked holding tanks, damaged vent pipes, and toilet seal failures. Black water repairs require proper handling and equipment — not a DIY job in most cases. Call us and describe what the system is doing and we can tell you what the likely repair involves.
RV Plumbing Repair Near You in North Alabama
Our shop is at 3619 AL-69 in Guntersville, Alabama. RV owners bring their plumbing problems to us from across North Alabama.
Serving Guntersville, Albertville, Boaz, Arab, Scottsboro, Fort Payne, Cullman, Attalla, Gadsden, Oneonta, Decatur, Huntsville, Grant, New Hope, Owens Cross Roads, Hampton Cove, Madison, and Athens.
Don't Let a Water Problem Become a Structural Problem
Tell us what the water is doing — or not doing — and we'll tell you what it takes to fix it.