RV MotorcoachPlumbing System Inspection
Recommended annually to help prevent water system failures. Complete plumbing inspection from faucets to holding tanks.
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Systems Checked
Complete Plumbing Check
Comprehensive inspection of the following plumbing systems:
Water Damage is Expensive
A small leak can cause thousands in damage. Our thorough inspection catches problems before they become disasters. Protect your investment with regular plumbing checks.
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What an RV Plumber Is Looking For
Most owners searching for an RV plumber in Las Vegas are not looking for a plumber in the household sense. A coach plumbing system runs on a 12 volt demand pump, PEX or older polybutylene line that has to survive vibration, a low pressure regulator on the city water inlet, and three tanks that move with the chassis. A residential plumber can see the leak. An RV plumber has to know why that fitting let go and what the coach did to it, which is why this inspection is a checklist rather than a callout.
The seven points above are ordered the way faults actually appear. A pump that cycles every few seconds with every tap closed means water is leaving the pressure side, or a check valve is letting it bleed back to the tank. A faucet that sputters on city water but runs clean on the pump points at the inlet screen or the regulator, not the faucet. A toilet that will not hold water in the bowl has a worn blade seal, which is also the usual reason tank odor gets into the coach. A dump valve that will not seat leaves the tank dribbling into the sewer cap, and a gate that needs force to move is usually a bent rod or a valve body packed with solids.
Plumbing is one section of the broader 45 point RV inspection, and the water heater is checked from both sides: the tank and relief valve here, and the burner and gas supply as part of the LP gas inspection.
Why Las Vegas Is Hard on Coach Plumbing
Heat is the local factor. The line itself tolerates it, but the rubber parts do not: pump diaphragms, P-trap seals, toilet blade seals and the gaskets in gate valves all dry and harden faster in a coach that sits through a desert summer. A crimp ring that held perfectly last season can weep the first time the system is pressurised after months in storage, and a pump that ran quietly can start cycling because its internal check valve has taken a set.
The valley also freezes. Winter nights drop below freezing often enough that a coach left with water in the low points can split a fitting, and the damage does not show until the system is refilled in spring. That is why the inspection and the winterization service are usually done in the same season, one before storage and one after.
Hard water is the third. Scale builds on faucet aerators, in the water heater and on toilet valve seats, which is where the fresh water system flush earns its place after an inspection that finds poor flow with no leak to explain it.
RV Plumbing Questions
Do you work as an RV plumber, or is this only an inspection?
The inspection is the diagnostic step, and it is deliberately a checklist rather than a callout, because on a coach the fault is rarely where the water shows up. What it finds is written up as repair work: a pump, a faucet cartridge, a toilet blade seal, a dump valve, a fitting or a section of line. That repair work is the RV plumber side of the same visit, quoted from what the inspection actually found rather than from a description over the phone.
Why does my water pump run when no tap is open?
A demand pump only runs when pressure on the line drops. If it cycles with every faucet closed, water is leaving the pressure side somewhere: a weeping fitting, a toilet valve that is not sealing, or a check valve inside the pump letting water bleed back into the tank. The pressure test on the checklist isolates which of those it is before anything is replaced.
Why will my RV toilet not hold water in the bowl?
The blade seal at the bottom of the bowl has hardened, worn, or has grit under it. When it stops sealing, the bowl drains into the black tank between uses and tank odor comes up the other way. It is one of the most common findings on a coach that has sat through a summer, and it is a seal replacement, not a toilet replacement.
Why is there a sewer smell inside the coach?
Four places, checked in order: a toilet blade seal that is no longer holding water, a dry P-trap under a shower or sink that has not been used for weeks, a roof vent that is blocked or too short to draw, or a black tank valve that is not fully seating. The smell is a symptom shared by all four, which is why the inspection checks each rather than assuming the tank.
Why is water pressure low on city water but fine on the pump?
The two supplies enter the coach through different paths. If the pump side is strong and the city side is weak, the problem sits between the hose and the coach: a clogged inlet screen, a pressure regulator that has failed low, or a city water check valve that is sticking. It is not the plumbing inside the coach, and replacing faucets will not change it.
Can a leak show up somewhere other than where the water is coming from?
Almost always. Water runs along a line or the inside of a wall until it finds a low point, so a wet floor at the back of a slide can trace to a fitting at the front of the coach. The inspection follows the line rather than the stain, and if the water turns out to be coming in from outside rather than from the plumbing, that is a seal job rather than a plumbing job.
How often should an RV plumbing system be inspected?
Annually, before the first trip of the season, and before storage if the coach will sit through winter. Rubber components in the pump, toilet and valves age whether or not the coach is used, and a coach that has sat with water in the lines through a Las Vegas summer is the one most likely to have a fitting weeping when it is next pressurised.
Related Water System Work
Plumbing findings usually point at one of these three jobs.
- Stale water, poor flow or a bad smell is addressed by the fresh water system sanitize and flush.
- No hot water, or water that runs hot then cold, points at the RV water heater service.
- Before cold weather, the RV winterization service protects everything the inspection has just checked.
- Water appearing where it should not may be a seal problem rather than a plumbing one, covered by the body seal reseal.
