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In-line disinfectionUV Disinfection
Where a permit calls for disinfected effluent, ultraviolet does the job with light instead of chemistry. Nothing to store, nothing to dose, nothing left in the water afterwards.
Disinfection without a chemical on site
Chlorine tablets work, but they are a consumable. Somebody has to buy them, carry them, load them, and remember to. When the tube runs empty the system stops disinfecting and nothing on the property says so.
Ultraviolet has no consumable in that sense. A lamp runs continuously, treated effluent passes it on the way out, and the only scheduled task is a lamp change about every four years — or sooner if the monitoring system flags it. There is no chemical to store, no handling risk, and no disinfection by-product left in the water that reaches the drainfield.
- Nothing to stock, dose or handle between service visits
- No residual chlorine reaching the dispersal field
- No by-products formed in the effluent
- Treatment happens at the moment of flow, not in a contact chamber
The housing, in 3D
Drag to spin it, pinch or scroll to zoom. Tap any part to see what it is — housing, bulb, drop tee, valve — or pick one from the list underneath.
How the unit treats
UV is the last stage. Everything upstream of it exists to make it work.
Secondary treatment first
Effluent reaches the unit already clarified by the treatment plant. This matters more than anything else on this page — ultraviolet light has to reach an organism to affect it, and suspended solids cast shadows. UV placed after a system that is not treating properly will not disinfect.
Flow past the lamp
Clarified effluent passes through the chamber, moving close alongside a low-pressure lamp housed in a quartz sleeve. The sleeve keeps the lamp dry and lets the light through while separating it from the flow.
Exposure
Ultraviolet at germicidal wavelength damages the genetic material of bacteria and viruses in the stream, leaving them unable to reproduce. Nothing is added to the water and nothing is removed from it — the change is to the organisms alone.
Discharge
Disinfected effluent continues to the dispersal method the permit specifies. A bypass and isolation valve let the unit be serviced without taking the whole system down.
Supplied as a package — with or without the panel
The UV unit ships alone, or as a package with a UL-listed control panel from Legacy Controls built for your application — nitrogen system, aerobic treatment unit, standalone disinfection, or a retrofit to what you already run. The panel is matched to the system it controls, not one-size-fits-all. Lamp ballast, breakers, terminals and the float circuit are laid out and labelled before it leaves the bench.
| Supply voltage | 120 VAC, 60 Hz |
| Phase | Single |
| Total FLA | 7 A |
| Largest motor FLA | 2 A |
| Interrupt / SCCR | 5 kA |
| Enclosure | Type 1 |
| Listing | UL, enclosed industrial control panel |
| Terminal torque | 4.425 in·lb |
Terminals are numbered and legended inside the door — ballast power and ground, both lamp circuits and common, high water float, and air pump. Whoever services it in five years does not have to guess.
What it asks of you
Short list, and none of it is a surprise.
Replace the lamp
Or whenever the monitoring system says output has dropped below an effective dose. You change it on data, not on a guess — a lamp that still glows is not necessarily still disinfecting.
At each serviceClean the sleeve
Film on the quartz sleeve blocks light before it reaches the flow. Wiping it down is a two-minute job and it is the difference between a working unit and a decorative one.
ContinuouslyKeep the plant treating
UV depends on clarity. If the treatment plant upstream is struggling, the disinfection stage is the first thing to lose — and it fails quietly.
Where UV sits in the system
Tell us what the permit requires
Send the daily flow, the discharge method, and the disinfection language in your permit. We will come back with a package, a panel and a price — and tell you honestly if chlorination would serve you better.
- Type
- In-line ultraviolet
- Position
- After secondary treatment
- Lamp
- Low pressure, quartz sleeved
- Supply
- 120 VAC, single phase
- Package FLA
- 7 A
- Panel
- UL listed, Type 1
- Service interval
- Lamp at ~4 years, monitor-verified
- Built in
- Mims, Florida
UV package at a glance