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Hallett R Series Reuse & Rainwater UV
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SKU:
406-RW-500R-120-S
Self-cleaning UV disinfection for rainwater harvesting, graywater and water reuse. Three 120 V models (500R, 750R, 1000R) track their UV dose and alarm when it drops. The 1000R is US EPA UVDGM and NWRI validated.
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Commercial UV for rainwater, graywater and nonpotable reuse
Hallett UV Pure R Series: Reuse & Rainwater UV Disinfection
Chemical-free UV disinfection for rainwater harvesting and water reuse that keeps its own sleeve clean, tracks its UV dose and signals a shut-off when dose drops. Three 120 V models, rated up to 37.5, 40 and 75 GPM on their spec sheets.
- 1000R: third-party validated to US EPA UVDGM and NWRI protocols
- Fights sleeve fouling: automatic wiper and purge valve on every model
- Signals a shut-off: RUN contact opens on low dose or power loss
- Every model: UL 979; wetted parts to NSF/ANSI/CAN 61 & NSF/ANSI 372
Reuse and rainwater UV built for water that is harder to disinfect than city water
Rainwater and graywater carry more particles and bigger swings in demand than a city supply. Here is what makes this water reuse UV system easier to run and easier to defend.
Paperwork your authority can review.
The 1000R is third-party validated to US EPA UVDGM and NWRI protocols. Its 50-150 mJ/cm² dose band covers the NWRI reuse design doses of 80 and 100 mJ/cm². It runs on 120 V at a published price. Other NWRI-validated options tend to be quote-only, need higher voltage or run reactors in series.
Stop fighting sleeve fouling.
Audits of installed reuse UV systems name sleeve fouling as a key reason they run inefficiently. Every R model wipes its quartz sleeve automatically, and a built-in purge valve keeps water moving through idle periods so the lamps stay on. Many small UV units have no wiper at all.
Proof of dose, and a shut-off signal when it drops.
NIST-calibrated sensors (dual on the 500R and 750R, quad on the 1000R) read UV intensity and UVT. The controller turns those readings into a live dose and alarms when it falls short. The RUN contact opens on alarm or power loss, so a PLC can close a valve or divert to drain.
Sized for your peak flow and your water.
US Water's WQA-certified specialists work from your UVT, solids, required dose and peak flow. They help you choose the model, the target flow to enter and whether you need a restrictor. The platform handles hardness to 50 gpg and iron to 3 mg/L.
Crossfire Technology: UV disinfection from every angle
A conventional UV sterilizer puts one lamp in the middle of the water. The R Series turns that around.
1
Step 1: Water flows inside a quartz sleeve.
Water rises through a quartz sleeve. The lamps sit in air outside it and never touch the water, so a lamp change needs no draining.
2
Step 2: Two lamps fire from 360 degrees.
Reflectors surround the sleeve, so UV reaches the water from every side instead of from one lamp in the middle. That matters in reuse water, where particles can shade microorganisms from a single light source.
3
Step 3: Sensors track dose and raise the alarm.
The controller calculates dose against the target flow the operator entered. If dose falls short, the unit alarms and the RUN contact opens. On the 500R and 750R, the optional solenoid also closes on power loss.
4
Step 4: The wiper keeps the sleeve clear.
A stainless wiper cycles for 5 minutes every 4 hours, with a position switch to confirm it moved. The purge valve bleeds water during no-flow periods; plumb it to a drain. The manual lists lamp replacement as the only required maintenance.
Rainwater, graywater and reuse applications, and what each model brings
| Application | What matters | Where to start |
|---|---|---|
| Rainwater harvesting for toilet flushing and irrigation | Endpoint water quality, hard or iron-bearing water | 500R or 750R; 1000R if the permit asks for a validation report |
| Graywater (greywater) recycling | Solids and fouling control | Any model with upstream filtration; wiper standard |
| Cooling-tower make-up and process water | Continuous monitoring, BMS logging | Any model; add 4-20 mA + Modbus |
| Pump-driven or intermittent systems | Frequent lamp starts | 1000R (6-12 starts per 24 h) |
| Permit routes that need a validation report or doses above 40 mJ/cm² | Third-party validation, 50-150 mJ/cm² | 1000R |
| Demand above one unit, or duty/standby | Redundancy, higher flow | Multiplex manifold (quote) |
| Spec | 500R | 750R | 1000R |
|---|---|---|---|
| Flow (single unit) | Up to 37.5 GPM (142 L/min) | Up to 40 GPM (151 L/min) | Up to 75 GPM (284 L/min)* |
| UVT range | 50-95% | 50-95% | 55-90% (North America) |
| UV dose | Min. 40 mJ/cm² | Min. 40 mJ/cm² | 50-150 mJ/cm² |
| Performance validation | Third Party (PENDING) | Third Party (PENDING) | US EPA UVDGM / NWRI |
| Certifications | UL 979 | UL 979 | UL 979 |
| Wetted parts | NSF/ANSI/CAN 61 & NSF/ANSI 372 | Same | Same |
| Lamps | Dual LPHO | Dual LPHO | Dual amalgam |
| Typical lamp life | 9,000 h | 9,000 h | 12,000 h |
| Lamp starts | Max 2 per 24 h | Max 2 per 24 h | Max 6-12 per 24 h |
| UV sensors | Dual, NIST-calibrated | Dual, NIST-calibrated | Quad, NIST-calibrated |
| Ports | 1-inch MNPT stainless | 1-inch MNPT stainless | 2-inch MNPT stainless |
| Power | 120 V, 196 W | 120 V, 222 W | 120/230 V, 403 W |
| H x W x D | 36.5 x 9.6 x 8.6 in | 40.4 x 9.6 x 8.6 in | 55.8 x 11.5 x 8.6 in |
| Weight dry / wet | 32 / 36 lb | 34 / 38 lb | 52 / 58.3 lb |
*The 1000R data sheet footnotes a 100 GPM (378 L/min) single-unit maximum. Wetted-parts conformance applies to water up to 73°F (23°C).
Standard on every model
Automatic wiper with position switch, purge valve, forced-air cooling, color touchscreen with onboard diagnostics, two dry contacts, remote start/stop, IP51 enclosure.
Operating limits (all models)
Hardness to 855 mg/L (50 gpg), iron to 3 mg/L, 5-100 psig. Water temperature 34-104°F (500R/750R) or 34-95°F (1000R).
Install notes
Mount the unit vertically on a solid wall and plumb the purge valve to a drain. Use metal pipe at the outlet, because water can get hot if the unit runs with no flow. The IP51 enclosure suits a dry mechanical room; for wet areas, ask about a NEMA cabinet system.
Certifications and NWRI validation, scoped to the model that earned them
Each model's own data sheet is the authority for what it carries. Here is exactly what each one lists.
Performance validation in accordance with the US Environmental Protection Agency Ultraviolet Disinfection Guidance Manual, as listed on the 1000R data sheet.
Performance validation in accordance with the National Water Research Institute Ultraviolet Disinfection Guidelines for Drinking Water and Water Reuse. The 1000R data sheet lists a 50-150 mJ/cm² dose band. Your authority having jurisdiction decides what documentation it accepts.
Listed in the validation block of the 1000R data sheet.
The parts that touch water meet the drinking-water system components standard and the lead-content standard, for water up to 73°F (23°C). This is a materials standard, not a disinfection-performance certification.
The safety standard for water treatment appliances, listed on each R data sheet.
The 500R and 750R carry no third-party performance validation. Their data sheets read "Validation protocol: Third Party (PENDING)".
Downloads
Data sheet note: UV Pure's 1000R data sheet lists this option as an automatic solenoid; the 1000R valve US Water supplies is a 2-inch actuated ball valve.
Warranty (per data sheet): 5-year limited on structure, hardware and mechanical parts; 3-year limited on electrical components and quartz sleeves; bulbs 12 months (500R/750R) or 16 months (1000R); sensor probes 1 year. Use genuine UV Pure lamp pairs (408-E300210 for the 500R, 408-C300065 for the 750R, 408-GC19 for the 1000R). Non-original lamps void the warranty and, per the manual, invalidate certification.
How the R Series stacks up against other small-flow reuse and rainwater UV
Generic categories, drawn from published specs. Where another option wins, the table says so.
| Feature | R Series 500R / 750R | R Series 1000R | Small drinking-water UV units | Engineered reuse reactors |
|---|---|---|---|---|
| Third-party performance validation | None (pending) | US EPA UVDGM + NWRI | Drinking-water UV certification | NWRI on several models |
| Named on California or San Francisco lists | No | No | Some models | Several models |
| Automatic sleeve wiper | Standard | Standard | Usually none | Varies |
| Purge valve for no-flow periods | Standard | Standard | Rarely listed | Not usually listed |
| Alarm and diversion outputs | 2 dry contacts + remote start/stop standard | Same; 4-20 mA option adds flow input | Often optional | Broader SCADA protocols on some |
| Hardness / iron limit | 50 gpg / 3 mg/L | 50 gpg / 3 mg/L | About 6-7 gpg / 0.3 mg/L | Often not published |
| Power and buying path | 120 V; configure online | 120 V (230 V by quote); configure online | Usually 120 V; published prices | Often 208 V+; usually quote only |
Reuse and rainwater UV questions
Is the R Series NWRI validated, and will the permit office accept it?
Only the 1000R: it is third-party validated to US EPA UVDGM and NWRI protocols, and the 500R and 750R are not. Your authority having jurisdiction decides what it accepts, and some programs, including California's pre-approved treatment trains, name a certification no R model holds. Check with them first; our specialists can help you assemble the documentation.
500R or 750R: which one do I need?
Pick the 750R when you want longer lamps, more power (222 W vs 196 W) and a higher spec-sheet flow on the same 1-inch plumbing. Both share a minimum 40 mJ/cm² dose row, a 50-95% UVT range and no third-party validation. The right pick depends on your UVT and required dose, not the headline figure, so size against both and talk to us first.
When do I need to step up to the 1000R?
Start with the 1000R when your permit route asks for a validation report, your dose target is above 40 mJ/cm² (its band is 50-150), or your pumps start and stop often. It also suits building-scale demand and sites that want a flow signal from a meter.
What UV dose does a water reuse system need?
It depends on your permit route, so confirm the target with your authority having jurisdiction first. UV dose is the UV energy delivered to the water, measured in mJ/cm². The NWRI reuse design doses of 80 and 100 mJ/cm² sit inside the 1000R's 50-150 mJ/cm² band. The 500R and 750R data sheets list a minimum 40 mJ/cm², so for targets above 40 mJ/cm², start with the 1000R.
Who sets the flow rate, and what if we run over it?
The operator enters the target flow on the controller, and the unit calculates dose against it and alarms when dose falls short. The setting does not physically cap flow. If actual flow runs above it, the unit can underdose, so fit the optional flow restrictor (internal on the 500R/750R, external on the 1000R) where peaks could exceed the setting.
Our water isn't very clear (low UVT). Will UV still work?
Not below each model's listed UVT floor, and above it, lower UVT means less flow per unit. UVT (UV transmittance) is the share of UV light that passes through your water. The data sheets list 50-95% UVT for the 500R and 750R and 55-90% for the 1000R in North America; below those floors, the R Series is the wrong tool. Because UVT changes the sizing as well as the model choice, send us your UVT data and a specialist will help you size it.
Do I need a filter before the UV system?
Yes, if your source is turbid. UV works best on clear water, and the O&M manual lists a 20 mg/L maximum for suspended solids in reuse applications unless UV Pure's proposal says otherwise, so filter turbid sources upstream. Hardness up to 50 gpg and iron up to 3 mg/L are within the platform's limits.
How often do we change lamps, and can it cycle on and off?
Typical lamp life is 9,000 hours on the 500R and 750R and 12,000 hours on the 1000R. The data sheets allow a maximum of 2 lamp starts per 24 hours on the 500R and 750R and 6-12 on the 1000R, so run the smaller models continuously and let the purge valve handle idle periods. Lamps change without draining.
Our peak flow is more than one unit can handle. What then?
Every R model is available in multiplex manifolds and cabinets, and the 1000R data sheet lists systems for flows up to 1 MGD. Multiplexing also gives you duty/standby redundancy. These are quoted projects, so start with a call and your peak-flow numbers.
Can I talk to a water specialist before I order?
Yes. US Water's WQA-certified water specialists, including Master Water Specialists, help you choose a model from your UVT, solids, required dose and peak flow. They will also help you decide the target flow to enter and whether you need a restrictor.
Check your numbers, then build your R Series
Send us your UVT, solids, required dose and peak flow. A WQA-certified specialist will help you pick the model and plan the flow setting.
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