Most RV plumbing failures don't happen because something broke. They happen because something wasn't maintained.
A leaking faucet, a sticky valve, a corroded aerator — each one is a $5 part that turns into a $500 problem when ignored long enough. Five maintenance habits prevent the entire cascade.
1. Use a Pressure Regulator. Always.
The single biggest cause of RV faucet failure is incoming water pressure that exceeds the fixture's rating. Campground pedestals routinely spike to 80+ PSI. RV faucets are rated for 40-60 PSI.
A $20 brass pressure regulator threaded onto your city water connection holds incoming pressure at a safe 45 PSI and protects every fixture downstream — faucets, toilet valves, shower wands, water heater check valves.
It's the cheapest insurance in the rig. Use it every time you hook up to city water.
2. Clean Aerators Twice a Year
The small mesh screen at the tip of your kitchen and bathroom faucets traps sediment and mineral deposits. When it clogs, flow drops, pressure climbs inside the faucet body, and seals start to fail.
Twice a year — or any time you notice flow dropping — unscrew the aerator (most twist off by hand or with pliers wrapped in tape), soak it in white vinegar for an hour, rinse, and screw it back on. Five minutes per faucet.
3. Sanitize the Fresh Water System Annually
The fresh water tank, lines, and faucets accumulate biofilm and mineral scale over time. Once a year (or any time the rig sits unused for more than a month), sanitize the system:
- Mix ¼ cup of household bleach with one gallon of water per 15 gallons of fresh tank capacity
- Add the mixture to the fresh tank, fill to full
- Run every faucet until you smell bleach, then close them and let sit 12 hours
- Drain, refill with fresh water, run every tap until the bleach smell is gone (usually 1-2 fills)
Cleaner water, fewer clogs, longer fixture life.
4. Drain Lines Before Freezing Weather
Water expands roughly 9% when it freezes. A line full of water in a wall cavity at 28 degrees becomes a split fitting. Split fittings turn into spring-leak surprises.
Before the first hard freeze:
- Drain the fresh tank and water heater
- Open every faucet (hot and cold) and the low-point drains
- Add RV antifreeze to the lines or blow the lines out with compressed air at 30-40 PSI
Both methods work; pick one based on what you have on hand.
5. Replace Worn Cartridges and Washers Before They Leak
Faucet cartridges (the moving piece inside the handle) wear out. So do the small rubber washers behind the spout swivel. When they start to weep, replace the part — don't ignore it.
A $4 cartridge and a 15-minute job is the difference between a working faucet and a $200 plumber visit. Most RV faucets sold in our store have replacement cartridges available individually so you don't have to buy a whole new faucet.
The Maintenance Calendar
The whole maintenance plan, calendared:
- Every hookup: pressure regulator on
- Quarterly: inspect under-sink connections for slow drips
- Twice a year: clean aerators
- Annually: sanitize fresh water system
- Before first freeze: drain and winterize lines
- As needed: replace worn cartridges and washers
Total annual time investment: about two hours. Total annual cost: about $30 in parts. The repairs you avoid will add up to far more over the life of the rig.
Need a replacement cartridge, washer kit, or aerator? Search the part by model on our site or email sales@rvfaucet.com and we'll point you to the right SKU.