Stuart RV Repair handles RV toilet problems on-site across Stuart, FL and Martin County. Seal swaps, pedal rebuilds, flush valve work, and full replacements. RVIA certified and stocked for same-day fixes.
Stuart RV Repair fixes and replaces RV toilets on-site across Martin County. Dometic ball seal swaps, Thetford blade seal replacements, foot-pedal rebuilds, and full toilet installs. $95-275 depending on the job. We come to your campground, driveway, or storage lot anywhere in Stuart, FL and surrounding areas. Call 772-280-3915. Looking for other RV plumbing services? We handle those too.
Most homeowners walk into their RV bathroom and expect everything to work like the house. It doesn't. RV toilets rely on a mechanical seal at the bottom of the bowl, either a ball type or a blade type, that opens when you step on the pedal. That seal is what separates you from the black tank below. And in Martin County's heat, that rubber deteriorates faster than you'd think.
We see the same pattern every week. An RV sits at a storage facility in Palm City or parked behind the house in Jensen Beach for a few months. Owner comes back, steps on the pedal, and water won't stay in the bowl. Or there's a sewer odor creeping into the bathroom that no amount of cleaning solves. Nine times out of ten, it's the seal. The rubber dried out, cracked, or warped in the Florida sun, and now gas is leaking up from the holding tank.
Beyond seal failures, we deal with foot-pedal mechanisms that lock up from mineral deposits (Martin County well water is particularly hard), water supply valves that stick open or won't close completely, and floor flanges where the original foam gasket has gone flat. And sometimes the toilet itself is the problem. A cracked porcelain bowl or a corroded mounting flange means it's time for a new unit, not another repair.
This is a worn ball or blade seal, plain and simple. It's the #1 reason people call us about their RV toilet. The bowl slowly empties after each flush, and eventually you're staring at a dry bowl and smelling the black tank. $85-125 to fix, and we carry both Dometic and Thetford seal kits on every service call.
The foam gasket between the toilet and the floor flange has compressed or deteriorated. After several years of use, it stops creating a watertight seal. We pull the toilet, inspect the flange and subfloor for damage, set a new gasket, and reseat the unit. Runs $75-115 and takes about 45 minutes.
Mineral buildup from hard water jams the linkage over time. Martin County's well water is loaded with calcium, and it cakes up inside the pedal mechanism. A full rebuild kit runs $95-145 installed. We also flush the internal passages to slow down the buildup going forward.
If you've cleaned everything and the odor persists, the seal is letting black tank gases pass through. A cracked roof vent stack can also trap gas and force it back down through the toilet. We inspect both during a single visit. Seal swap is usually all it takes, $85-125.
Could be a partially closed water supply valve, calcium-clogged rinse holes around the rim, or a failing flush valve assembly. On pump water systems, the issue sometimes traces back to low pressure from the freshwater system. We check every component upstream of the bowl.
Here's our rule of thumb: if the repair is under $130 and the toilet is less than 8 years old, fix it. If the bowl is cracked, the flange is corroded, or you're on your third seal in two years, a new Dometic 310 or Thetford Aqua-Magic V runs $185-275 installed. We'll give you the honest answer.
Each brand uses a different seal geometry, different mounting hardware, and fails in its own way. Here's what we work on most across Stuart and Martin County, and what to expect from each.
The 300-series gravity flush is the single most common RV toilet on the road. The 310 is standard height, the 320 is the taller "residential" version. All three share the same ball seal, part #385311462, and we keep a stack of them on the truck. According to Dometic, this seal should last 5+ years, but South Florida humidity and heat cut that down to 3-4 years in practice.
Thetford's lineup uses a blade seal instead of a ball. The Aqua-Magic V is the entry model, Style II is mid-tier, and Style Plus is top-end. Blade seals warp gradually rather than cracking all at once, so you'll notice the bowl holding less and less water over a few weeks. The #31705 seal kit for Aqua-Magic V models is the Thetford part we replace most often.
Cassette toilets are standard in Class B campervans and smaller travel trailers. These self-contained units have a removable waste cartridge, no connection to a traditional black tank. Seal leaks and pump failures are the common issues. The C2 and C4 cassette series require Thetford-specific parts with a different seal profile than the gravity flush models.
Found in European-designed builds and newer American Class B rigs like the Winnebago Revel. These ceramic-bowl cassette units use a completely different seal geometry from the 300-series. Parts availability is tighter, but we can source everything needed and usually have it within a day or two if it's not already in stock.
Call 772-280-3915 or use the online form. Tell us what's going on: leaking base, bad odor, stuck pedal, or a toilet that won't flush properly. If you know the brand and model number, even better. We'll get you scheduled same or next day in Martin County.
Our tech arrives at your location, pulls the cover, identifies the toilet model, checks the seal condition, and tests the pedal mechanism and water valve. You get a written estimate before any work starts. Most toilet problems take about 15 minutes to pin down.
We stock Dometic ball seals, Thetford blade seal kits, flush valve assemblies, pedal rebuild kits, and replacement toilets on the truck. Most toilet repairs are done in under an hour. A full swap takes 60-90 minutes. One visit, one fix, done.
| Repair Type | Price Range | Typical Time |
|---|---|---|
| Ball seal replacement (Dometic) | $85-125 | 40 min |
| Blade seal replacement (Thetford) | $85-120 | 40 min |
| Foot pedal / flush mechanism rebuild | $95-145 | 30-45 min |
| Water supply valve replacement | $65-105 | 25 min |
| Flange gasket / mounting bolt repair | $75-115 | 30-45 min |
| Hand sprayer hose swap | $45-75 | 20 min |
| Full toilet replacement (installed) | $185-275 | 60-90 min |
Our Dometic 310 stopped holding water in the bowl right before a trip to Jonathan Dickinson State Park. Called Stuart RV Repair on a Thursday, tech showed up Friday morning with the ball seal already on the truck. 40 minutes later it was done. Saved our weekend plans.
Terrible smell in our Class A for weeks. Tried every tank treatment and cleaning product we could find online. Turns out the Thetford blade seal was warped. Tech replaced it in about 45 minutes and the smell was gone instantly. Wish we'd called sooner instead of wasting money on chemicals.
Pedal on our Dometic was completely locked up. The tech said it was calcium buildup from our well water. He rebuilt the entire mechanism and flushed the valve, works perfectly now. Honest guy too, told us what we could do ourselves to prevent it next time.
RV toilet repairs in Stuart typically cost $85-275. A ball or blade seal swap runs $85-125. Foot-pedal rebuilds are $95-145. A complete toilet replacement with a new Dometic 310 or Thetford Aqua-Magic V runs $185-275 installed. You'll always get a written quote before we start any work.
We do every RV toilet replacement on-site. The toilet bolts to a floor flange with a gasket underneath. Pulling the old one, prepping the flange, setting a new gasket, and installing the replacement takes 60-90 minutes. No shop trip needed. We do this at campgrounds, storage lots, and driveways throughout Martin County.
Three signs: the bowl won't hold water and slowly empties after flushing, you smell sewer gas even after cleaning, or water pools around the base when you flush. If the bowl water disappears within a couple hours, that's a dried-out or cracked seal. We replace these multiple times per week across Stuart and Palm City.
We work on Dometic 300, 310, and 320 series, Thetford Aqua-Magic V, Style II, and Style Plus, plus Thetford Porta Potti and cassette units. Dometic and Thetford cover about 95% of the RV toilets we see in Martin County. Parts for both are on the truck every day.
About 40 minutes for a seal swap. Pedal rebuilds run 30-45 minutes. A full toilet replacement takes 60-90 minutes. We also inspect the flange and test the water supply valve before wrapping up. Most jobs are completed in a single visit with no need for a follow-up.
If the bowl is spotless and you still smell sewer gas, the problem is underneath. A worn ball or blade seal lets black tank fumes seep up past the seal into the bathroom. A cracked roof vent pipe can also force those gases back through the toilet. We check both during a service call. A seal replacement at $85-125 usually fixes it.
We handle all RV plumbing repairs across Martin County. Water heaters, leak detection, shower fixes, pipe repairs, and emergency calls. If you've got multiple plumbing issues, we'll take care of everything in one visit.
We cover Martin County and surrounding areas for all RV toilet repairs. From Stuart and Palm City through Jensen Beach, Hobe Sound, Port Salerno, and beyond.
Call us or request a free estimate. We'll send a tech to your location with the right parts, same or next day. Seal swaps, pedal rebuilds, full toilet replacements. All done at your campground or driveway.