A 20-ft water trailer that runs on the restaurant's own 50A power and treats water with ultrafiltration plus virus-rated UV — paired with a separate PWR-25 generator trailer that only rolls when the power is out.
Restaurants need city power to cook. On almost every restaurant job the building already has power — so an onboard generator mostly rides along unused.
No diesel, no fuel tank, no generator compartment, no transfer switch. On-site weight drops from 9,820 lb to 8,660 lb — a 1,330 lb margin under the 9,990 lb rating.
Rental generators disappear right after hurricanes and ice storms. An owned PWR-25 is always available — and one generator trailer backs up two or three water trailers.
A diesel that runs a few weeks a year clogs its exhaust filter and won't start when needed. Between emergencies the PWR-25 works other AmeriPro jobs or runs monthly against a load bank.
During a Boil Water Advisory, most restaurants stay open on bottled water, bagged ice, disposables and a limited menu. The MWTP-50C is for the kitchens where that costs more than a deployment.
Warewashing, ice and beverage volume that bottled water can't cover.
Brand standards that don't allow a degraded menu or paper service.
Nursing homes, assisted living, schools and correctional facilities that can't send residents elsewhere.
Production lines that stop without potable water.
City water feeds the plant directly through a backflow preventer, and UV carries the virus kill — so the break tank and contact tank stay home on Boil Water Advisory jobs.
Service-line tee or hydrant → PSV-100 (holds ≥ 20 PSI) → 1.5" RPZ-100
3 HP boost pump, 200 µm auto-strainer, duplex 25 µm bags
4 × 60" PVDF modules, 0.02 µm, daily integrity test
186 mJ/cm² validated, duty + standby, live dose calculation
1.5–2.0 mg/L to protect the building's pipes — no contact tank
150-gal clearwell, duplex 3 HP VFD, 2" RPZ-602 → 60–75 PSI
XV-602.
EPA's LT2 UV dose table credits 4-log virus inactivation at 186 mJ/cm², based on adenovirus — the most UV-resistant virus. Rev B's 40 mJ/cm² only covered Giardia and Cryptosporidium.
| Target | MWTP-50 (Rev B) | MWTP-50C (Rev C) | How It's Proven |
|---|---|---|---|
| Crypto / Giardia | UF + UV 40 mJ/cm² | UF + UV 186 mJ/cm² | NSF 419 modules, daily pressure-decay test |
| Bacteria | UF + chlorine | UF + UV + chlorine residual | Online turbidity, Bac-T samples |
| Viruses (4-log) | Chlorine CT in 600-gal ground tank | UV validated at 186 mJ/cm² | Live dose from intensity, UVT and flow |
| Building residual | Chlorine 1.5–2.2 mg/L | Chlorine 1.5–2.0 mg/L | ≥ 1.0 mg/L at the farthest tap |
The trailer never pulls the city main below 20 PSI, and two closed building valves always separate raw water from treated water.
PSV-100 holds the upstream line at 20 PSI or more.RPZ-100 (ASSE 1013) replaces the air gap; a flow switch alarms if its relief port discharges.With the generator gone, the gooseneck nose holds the control panel, air and chemical cabinets — outside the operator space and over the hitch.
Integrated fuel tank and 110% spill base. Delivered by a second pickup and left on site — the driver doesn't stay.
Every motor is 3 HP or smaller on a VFD that takes 240V single-phase power, so the plant runs from the same cord whether it's plugged into the restaurant or the PWR-25.
Plug into a 240V 50A receptacle installed at the site survey ($800–$2,000 by the restaurant's electrician). Silent, no exhaust, no fuel. Roughly 180 kWh/day on the restaurant's bill.
PWR-25 parks 10 ft or more from building openings and the dining area, ground rod driven, 50A cord to the same inlet. Its fuel tank covers more than two days between refuelings.
Water trailer price includes PE engineering, UV validation submittal, integration and 15% contingency.
25 kVA towable generator $27,500 · 50A panel & cords $1,800 · folding break tank $2,400 · hoses & adapters $1,200 · kit box $900 · fuel pump & spill kit $700
| Configuration | 1 Unit | 2 Units |
|---|---|---|
| MWTP-50 (generator on board) | $238,625 | $477,250 |
| MWTP-50C + one shared PWR-25 | $253,920 | $473,340 |
About $15,000 more for one unit; less from the second unit on, because one PWR-25 backs up the whole restaurant fleet.
Same pricing as the MWTP-50 — $1,800/yr single store or $1,500/yr per group store (max 10 per unit), $2,500 mobilization, $3,200/day — plus a generator add-on of $750 delivery + $400/day on outage jobs.
AmeriPro plans to grow past one restaurant unit, or can use the PWR-25 on other work between emergencies.
Costs and loan coverage are about even with the MWTP-50; the lighter trailer and 1.5-hour setup make the MWTP-50C the better field unit.
Keeps its onboard 80 kW generator and contact tank — hospital jobs are where power and water fail together.