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Toto Construction in North Tustin, CA | Stallion Contractors
We install, repair, and remodel around Toto fixtures across North Tustin, and we’re the crew that understands what actually happens when Japanese-engineered toilets and bidet seats meet Orange County’s unincorporated building rules, private wells, and 1960s cast-iron drains. Stallion Contractors is an independent Toto service provider, not manufacturer-affiliated or authorized. If you’re planning a bathroom remodel, a Washlet installation, or chasing a Toto that won’t stop running on well water, call (855) 600-3192. Our Toto sales & service experience covers the full fixture lineup.

Why North Tustin Residents Choose Us for Toto Service
Most plumbers can swap a flapper. Fewer can tell you why a Toto Drake on a North Tustin private well eats fill valves twice as fast as the same toilet on municipal water, or why a Washlet in a 1960s ranch bathroom trips the GFCI when the Santa Anas kick dust through the attic. That’s the difference between a parts-changer and a General Contractor – North Tustin who actually works inside these homes. That’s the difference between a parts-changer and a contractor who actually works inside these homes.
Ruben Montoya, our owner, grew up around tradesmen who understood soil, sun, and structure before they ever picked up a sales script. His father was a finish carpenter, and that’s part of why we still pay more attention to the final ten percent of a job than most contractors pay to the first ninety. In North Tustin, where homes sit on half-acre-plus lots with original plumbing and irregular additions, that attention matters. We’re part of the North Tustin service area team that handles everything from a single fixture repair to a full bathroom gut, and we stock genuine Toto OEM parts so we’re not waiting on a distributor when your toilet’s been running for a week.
Styles & brands we work with







Common Toto Construction Problems We Solve in North Tustin
- Washlet failure from heat and dust. North Tustin’s inland foothill summers run hot and dry, and the Santa Anas push fine dust through every gap. On Toto Washlet seats like the S550e and C5, that means dried-out internal seals, cracked supply lines, and control-board faults from heat buildup in bathrooms without good ventilation. We see it every August, especially on older ranches with original windows and no AC in the older bath additions.
- Fill and flush valve wear on well-fed Drakes and Ultramax IIs. Private well water in North Tustin carries minerals that municipal systems filter out. On Toto Drake, Drake II, and Ultramax II toilets, that sediment chews through fill valves, causes weak refills, and leaves flappers phantom-running until the toilet cycles on its own every twenty minutes. We replace with OEM Toto components where the fixture is still serviceable.
- Wax ring and flange failures on 1950s – 1970s ranch slabs. North Tustin’s original homes sit on concrete slabs, often with cast-iron drains that have shifted over six decades. When floors settled and additions were framed with non-standard dimensions, the toilet flange ends up low or off-level. That stresses the wax ring until it leaks slowly into the slab or under the flooring, and you don’t smell it until the damage is done.
- Washlet GFCI and wiring tripping in older homes. A lot of North Tustin bathrooms still run on original 1960s wiring. When a Toto Washlet gets added without a dedicated outlet, the seat’ll trip GFCI breakers or struggle on shared circuits, especially during heat waves when other loads are already drawing. We run a dedicated line when we install, and we fix the ones that weren’t.
- Running toilets from commercial-style flush valves in detached shops. North Tustin properties often have detached shops or guest structures where someone installed a Toto EcoPower or commercial-style flush-valve fixture. Those valves behave differently than residential tank toilets, and mineral buildup from well water makes them stick. We service the full range.
Toto Service in North Tustin: What Local Conditions Mean for Your Equipment
North Tustin is unincorporated, which means any bathroom remodel that moves a Toto toilet’s drain line or adds a Washlet outlet has to clear Orange County building and septic/well coordination, not a city counter. That’s a genuinely different process than what a contractor in neighboring Santa Ana, Villa Park Toto service, or Tustin deals with. It’s also where out-of-area crews slow down. County inspectors here scrutinize grading and drainage on sloped lots in a way city inspectors don’t, and if the existing cast-iron drain offsets or the flange sits low, the correction isn’t optional. We’ve pulled enough of these permits to know what gets flagged before it gets flagged.
On a half-acre lot off Santiago Canyon Road, our crew remodeled a 1960s ranch bathroom where the original Toto Ultramax II had been running constantly on private well water, and the homeowner wanted a frameless walk-in shower plus a relocated vanity. We pulled the Orange County permit, reset the cast-iron drain and flange with a new wax ring, installed an OEM fill valve, and rebuilt the space around a Toto Washlet with a dedicated GFCI line. The fixture stopped running, and the shower and vanity cleared county inspection without a drainage correction. That’s how the work should go here, every time.
Toto Models & Products We Service in North Tustin
We service the full Toto lineup that shows up in North Tustin homes: Drake and Drake II two-piece elongated toilets, Ultramax II one-piece toilets, Washlet electronic bidet seats including the S550e and C5, and EcoPower or standard flush-valve commercial-style fixtures often reused in detached shops and guest structures. Our approach on parts is straightforward: genuine Toto OEM fill valves, flappers, wax rings, and Washlet components wherever the fixture is serviceable. We reserve quality aftermarket parts for out-of-production or budget-driven repairs, and we’ll tell you which is which before we do the work. When a well-mineralized toilet or a heat-failed Washlet keeps recurring, we’re honest about whether repair or replacement is the better long-term call.
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AfterToto Service Pricing in North Tustin
What you’ll pay depends on what the fixture’s doing and what’s feeding it. A fill valve on a well-fed Drake is a different job than a wax ring and flange reset on a sloped 1960s slab, and a full bathroom remodel is a different scope entirely. Here’s how our Toto-related work prices out in North Tustin:
| Service | Price Range |
|---|---|
| Bathroom Remodel | $9,000 – $28,000 |
| Walk-In Shower Installation | $4,500 – $12,000 |
| Tub-to-Shower Conversion | $3,500 – $10,000 |
| Shower Replacement | $3,000 – $8,500 |
| Bathroom Vanity Installation | $800 – $3,000 |
Every estimate includes a written line-item breakdown, so you know exactly what’s parts, what’s labor, and what’s permit coordination. No change orders after we start unless you change the scope. Call (855) 600-3192 to schedule a free estimate, and we’ll put real numbers on your Toto project.

Serving North Tustin, CA — Our Local Coverage Area
We’re based in the North Tustin area and know this community well. Use the map below to see our service coverage — if you’re nearby, we can almost certainly help.
FAQs – Toto Construction in North Tustin
Yes, in most cases. The washlet needs a dedicated GFCI outlet, which older North Tustin bathrooms often lack, and the water supply line should be checked for mineral condition before the seat goes in. On well systems, we recommend a sediment filter on the supply feeding the Washlet so the solenoid and internal seals don’t clog prematurely. Call (855) 600-3192 for a free assessment of your specific bathroom’s wiring and plumbing.
On North Tustin’s private well systems, mineral sediment and scale are the usual culprits. The fill valve seal hardens or clogs, the flapper doesn’t seat evenly, and the tank cycles to compensate. We replace with OEM Toto components and can tell you within a visit whether the valve is worth rebuilding or the toilet’s reached the point where replacement costs less over time. Call (855) 600-3192 and we’ll diagnose it.
Yes. Because North Tustin is unincorporated, moving a drain line goes through Orange County building and septic/well coordination, not a city building department. County inspectors also review grading and drainage on the lot, especially if the home sits on a slope. We handle the permit, coordinate with county inspectors, and make sure the plumbing and drainage plan passes the first review.
Usually, yes. The most common post-heat failures we see in North Tustin are dried-out supply seals, dust-clogged internal valves, and occasional control-board faults from sustained heat exposure. When the board fails on an older unit, replacement parts can cost enough that a new seat makes more sense, and we’ll give you the straight answer on which path is cheaper over the next five years. Call (855) 600-3192 for a diagnostic.
It will, provided the flange and drain are in good condition. On original 1960s slabs, the cast-iron often measures fine at the floor but has a flange sitting low or off-level from decades of settling. We reset the flange, use the proper wax ring, and confirm the drain’s clear before the new Toto goes down. Skipping that step is how hidden slab leaks start.
Service Areas Near North Tustin
Stallion Contractors serves North Tustin and the surrounding communities across Orange County and the Inland Empire. If you’re in Colton, Bloomington, Mentone, San Antonio Heights, Loma Linda, or Redlands, our Toto service crews cover those areas too. For nearby work, see our Toto service in Orange and Toto service in Garnet pages.
Book Your Toto Service in North Tustin Today
If your Toto’s running, leaking, or you’re planning a bathroom remodel that involves moving one, we’ll show up, assess it, and give you a straight answer on the fix. Good work doesn’t need a sales pitch – it needs the right materials and someone who knows what they’re doing. Call (855) 600-3192 to schedule your free Toto service estimate in North Tustin.
Written by Ruben Montoya, Owner at Stallion Contractors, serving North Tustin and surrounding Orange County communities.