♨️ Elecro H.R.UV-C Spa Pro 30W UV Sterilisation System with Amalgam Lamp and Intelligent Dosing Pump (HRP-30-UK-SPA)

Temperature-stable amalgam lamp technology with 14,000 hour life, digital countdown and smart trickle dosing for complete automated spa water treatment up to 30m³

💧 Product Overview

The Elecro H.R.UV-C Spa Pro (HRP-30-UK-SPA) is specifically engineered for spa, hot tub and hydrotherapy installations where elevated water temperatures demand specialised UV technology. Using the latest amalgam lamp technology, this compact yet powerful system provides consistent UV-C output across a wide temperature range (0-40°C), maintaining optimal sterilisation performance even in varying spa conditions.

Manufactured in England by Elecro Engineering Ltd, the Spa Pro features the highest UV reflective index on the market with an E-PTFE reaction chamber maintaining up to 95% UV reflection. The extended 14,000 hour amalgam lamp life (compared to 9,000 hours in standard pool models) combined with the intelligent trickle dosing system makes this the ultimate solution for demanding spa environments requiring complete automated water treatment.

Designed for spas up to 30,000 litres (30m³) with flow rates up to 12,000 litres per hour, the system delivers comprehensive pathogen elimination whilst automatically dosing hydrogen peroxide or liquid chlorine through advanced trickle dosing technology.

⭐ Key Features

• ✅ Amalgam Lamp Technology – Consistent UV-C output across 0-40°C temperature range
• ✅ 14,000 Hour Lamp Life – Extended life compared to standard 9,000 hour pool lamps
• ✅ Highest UV Reflective Index – E-PTFE chamber maintains up to 95% UV reflection
• ✅ Digital Lamp Life Countdown – Precise hour-by-hour monitoring with LED status indicators
• ✅ Intelligent Trickle Dosing – Advanced peristaltic pump with multi-interval delivery
• ✅ Flow Switch Protection – Prevents dry running and ensures safe operation
• ✅ 30W Lamp Output – Powerful sterilisation for spas up to 30m³
• ✅ Exceeds 30mJ/cm² Dosing Rate – At maximum flow rate for effective sterilisation
• ✅ 100% Salt Water Compatible – Safe for chlorinated salt and sea water systems
• ✅ IP64 Ingress Protection – Protected against dust and water splashes
• ✅ Vertical or Horizontal Mounting – Flexible installation options
• ✅ 2 Year Warranty – Within Europe (1 year outside Europe)

🔧 Technical Specifications

Specification	Value
Model	HRP-30-UK-SPA
Product Type	Spa Pro
Application	Spas, Hot Tubs, Hydrotherapy
Technology	High Reflection UV-C with E-PTFE Chamber
UV Reflection	Up to 95%
Lamp Output	30W
Lamp Type	Amalgam (temperature-stable 0-40°C)
Lamp Life	14,000 hours
Maximum Spa Volume	30,000 litres (30m³)
Maximum Flow Rate	12,000 litres per hour (12m³/h)
Maximum Power Consumption	40W
Power Supply	Single Phase 100-240V
Frequency	50/60 Hz
Dosing Rate	Exceeds 30mJ/cm² at maximum flow rate
Working Pressure	3 Bar maximum
Ingress Protection Rating	IP64
Water Connections	2″/63mm stepped ABS unions + 1½”/50mm reducers
Salt Water Compatible	100% chlorinated salt and sea water safe
Mounting	Vertical or horizontal wall mounting
Oxidisation Process	UV
Dimensions	623mm × 349mm × 141mm
Net Weight	5.43 kg
Gross Weight	7.30 kg
Warranty	2 years (Europe) / 1 year (outside Europe)

🔬 How It Works

The H.R.UV-C Spa Pro utilises advanced high reflection technology with temperature-stable amalgam lamp for maximum UV-C sterilisation effectiveness in spa environments:

Spa Water → Pump → Filter → Heater → H.R.UV-C SPA → Chemical Dosing → Return to Spa

1️⃣ AMALGAM LAMP TECHNOLOGY Unlike standard UV lamps that lose efficiency at elevated temperatures, the amalgam lamp maintains consistent UV-C output across the full 0-40°C temperature range. This ensures optimal sterilisation performance regardless of spa water temperature fluctuations.

2️⃣ E-PTFE REACTION CHAMBER Water enters the UV chamber lined with E-PTFE (expanded polytetrafluoroethylene), an extremely repellent material that maintains UV reflectivity throughout the product’s life.

3️⃣ HIGH REFLECTION UV-C STERILISATION The 30W amalgam lamp emits UV-C radiation. The E-PTFE chamber reflects up to 95% of this radiation, dramatically amplifying microorganism exposure and destroying bacteria, viruses, algae and fungi that traditional chemicals cannot neutralise.

4️⃣ INTELLIGENT TRICKLE DOSING The integrated peristaltic pump automatically doses hydrogen peroxide or liquid chlorine using advanced trickle dosing technology, distributing chemicals evenly throughout filtration hours for optimal spa water balance.

Temperature Performance Comparison

Temperature	Standard Lamp Output	Amalgam Lamp Output
0°C	~40%	~90%
20°C	~100%	~100%
40°C	~60%	~95%

Key Benefits:

• Consistent UV-C output in spa temperature conditions (35-40°C)
• No harmful gases or by-products produced
• Neutralises bacteria, viruses, algae and fungi that traditional chemicals cannot
• Powerful sterilisation eliminates the smell of chlorine
• E-PTFE chamber maintains reflectivity – no degradation over time

🖥️ Digital Lamp Life Indicator System

The HRP-30-UK-SPA features an advanced digital countdown display showing remaining lamp hours:

LED Colour	Status	Action Required
🟢 Green	Normal operation	None
🟡 Amber	Lamp life low	Order replacement lamp
🔴 Red	Lamp expired	Replace lamp immediately

Digital Features:

• Precise countdown display
• Automatic LED colour change at threshold points
• Power failure does not affect lamp life countdown
• Simple reset procedure after lamp replacement
• Multi-language menu selection on power-up

💊 Intelligent Trickle Dosing System

The Spa Pro features an advanced trickle dosing system specifically designed for spa applications:

Mode A: Hydrogen Peroxide (H₂O₂) Dosing

Dosing Table – H₂O₂ at 32% Concentration, 28°C Water Temperature:

Spa/Pool Volume	Daily Dose
35m³	200ml/day
50m³	320ml/day
60m³	420ml/day
80m³	620ml/day
90m³	700ml/day
100m³	800ml/day
130m³	1,040ml/day
150m³	1,200ml/day

💡 Note: For 12% concentration H₂O₂, multiply dosing amounts by 3. The digital controller automatically senses water temperature and adjusts the required dose accordingly.

Mode B: Liquid Chlorine Trickle Dosing

⭐ TRICKLE DOSING FEATURE: When dosing liquid chlorine, the Spa Pro uses advanced trickle dosing technology:

• Daily dosage is split into multiple intervals within filtration hours
• Example: 420ml split into 20 smaller doses
• Each dose injected for 32 seconds
• Doses equally spaced throughout a 6-hour period
• Provides even chemical distribution for optimal spa water balance

Dosing Table – Stabilised Liquid Chlorine:

Spa/Pool Volume	Daily Dose
10m³	200ml/day
20m³	400ml/day
30m³	600ml/day
40m³	800ml/day
50m³	1,000ml/day
60m³	1,200ml/day

💡 Note: Dosage is approximate and dependent on spa volume, local water type, temperature, bather loading and usage patterns. The controller does not monitor free chlorine levels – regular testing and adjustment is required.

Power Failure Protection: If a power cut occurs during trickle dosing, the unit will continue to dose the outstanding volume once power is restored. Volume that should have been dosed during the power loss will be skipped.

Shock Dose Function

The shock dose feature enables immediate dosing with a chosen volume following heavy spa use or water condition changes. Simply select the volume and confirm – dosing begins immediately when the filtration pump is operational.

⚡ Electrical Requirements

Specification	Value
Supply Voltage	Single Phase 100-240V
Frequency	50/60 Hz
Maximum Power Consumption	40W
Plug Type	UK 3-pin (HRP-30-UK-SPA)

⚠️ IMPORTANT ELECTRICAL SAFETY:

⚠️ This device must be installed by a qualified electrician following 
   the instructions provided in the manual.

⚠️ The power supply MUST be fitted with a 30mA RCD (Residual Current Device).

⚠️ Installation must comply with UK wiring regulations (BS 7671) and 
   country/regional requirements.

⚠️ An Electrical Installation Certificate must be provided on completion.

⚠️ The manufacturer will not be liable for issues caused by poor or 
   improper installation.

⚠️ Do not operate the UV-C emitter when removed from the appliance enclosure.

⚠️ UV-C radiation may cause harm to eyes and skin even in small doses.

🔄 Compatibility

Water Connections

Connection Type	Size
Main Unions	2″/63mm stepped ABS
Reducers Included	1½”/50mm
Pipe Material	ABS or PVC (with appropriate cement)

Flow Requirements

Parameter	Value
Maximum Flow Rate	12m³/h (12,000 litres per hour)
Maximum Working Pressure	3 Bar

💡 Note: A higher flow rate will require the installation of a bypass to prevent damage to the unit.

Water Quality Requirements

The water quality MUST be within the following limits:

Parameter	Required Range
pH	6.8 – 8.0
Total Alkalinity (TA)	80 – 140 ppm
Chloride Content	Maximum 150 mg/litre
Free Chlorine	2.0 mg/litre
Total Bromine	Maximum 4.5 mg/litre
TDS/Calcium Hardness	200 – 1,000 ppm

⚠️ Warning: Failure to meet the water quality limits will void the warranty.

Water Type Compatibility

Water Type	Compatible
Fresh Water	✅ Yes
Salt Chlorinated Water	✅ Yes (100% compatible)
Sea Water	✅ Yes (100% compatible)

🔌 Installation Requirements

System Position

PUMP → FILTER → HEATER → ⭐ H.R.UV-C SPA ⭐ → CHEMICAL DOSING → SPA
                                  ↓
                           NON-RETURN VALVE

The H.R.UV-C SPA must be installed:

• AFTER pumps, filters and heating devices
• BEFORE any chemical dosing or similar water treatment

Mounting Requirements

Requirement	Specification
Position	Horizontal or vertical
Location	Dry, permanent weather-proof area
Wall Type	Solid wall with fixing kit provided
Clearance	Minimum 1 metre from one side for lamp/quartz sleeve access

Installation Notes

⚠️ The unit must be installed within a dry, permanent weather-proof area.
   Water or moisture entering the enclosure will void the warranty.

⚠️ Leave 1 metre clearance space for lamp and quartz sleeve replacement access.
   - Vertical mounting: clearance above OR below
   - Horizontal mounting: clearance to left OR right

⚠️ If unused during winter months, drain the unit to prevent frost damage.
   Water freezing inside will cause severe damage.

💡 Flow direction is factory set: input water enters LEFT, exits RIGHT.
   Flow can be reversed by rotating flow switch 180° (½ turn).

💡 No PTFE tape or mastic required for union connections - use O-rings provided.

💡 Use ABS cement for ABS pipe or Transition cement for PVC pipe connections.

🛠️ Maintenance

Routine Maintenance Schedule

Task	Frequency
Check digital lamp life indicator	Monthly
Inspect connections for leaks	Monthly
Replace UV lamp	When indicator shows red / ~14,000 hours
Clean quartz sleeve	During lamp replacement or as needed
Replace all O-rings	Annually
Inspect lamp connectors	Annually (replace if corroded, wet, damaged or overheated)
Replace dosing tube	Every 6-12 months
Inspect plastic body and compression fittings	During lamp changes

Replacement Parts

Part	Part Number	Description
UV Lamp	SP-UV-LAMP-30-AM	30W Amalgam replacement lamp
Quartz Sleeve	SP-UV-QS-30	Replacement quartz sleeve
O-Ring Set	SP-UV-ORS	Complete O-ring replacement set

⚠️ Important: The Spa Pro requires the Amalgam lamp (SP-UV-LAMP-30-AM) – do not use the standard pool lamp (SP-UV-LAMP-30).

Quartz Sleeve Cleaning

If you live in a hard water area, limescale may accumulate on the quartz sleeve. Remove by soaking in a proprietary kettle descaling solution following manufacturer’s instructions.

⚠️ Note: Failure to remove limescale will limit the effectiveness of the UV lamp.

Dosing Pump Maintenance

Replace the dosing tube every 6-12 months to prevent wear and maintain optimal performance. The manual provides step-by-step tube replacement instructions.

💎 Benefits

Benefit	Description
♨️ Spa-Optimised	Amalgam lamp designed for elevated spa temperatures (0-40°C)
⏰ Extended Lamp Life	14,000 hours – significantly longer than standard 9,000 hour pool lamps
✨ Supreme Efficiency	Highest UV reflective index on the market with E-PTFE chamber
🔬 95% UV Reflection	Dramatically amplifies microorganism exposure
🦠 Destroys Resistant Pathogens	Neutralises bacteria, viruses, algae and fungi that chemicals cannot
💊 Trickle Dosing	Even chemical distribution throughout filtration hours
🖥️ Digital Monitoring	Precise lamp life countdown with automatic alerts
👃 Eliminates Chlorine Smell	Powerful sterilisation reduces chemical odour
♻️ No Harmful By-Products	No harmful gases or by-products produced
🌊 Salt Water Safe	100% compatible with chlorinated salt and sea water
⚡ Energy Efficient	Only 40W maximum power consumption
🇬🇧 UK Manufactured	Made in England by Elecro Engineering Ltd

❓ Frequently Asked Questions

Q: Why does the Spa Pro use an amalgam lamp instead of a standard lamp? A: Standard UV lamps lose efficiency at elevated temperatures typical in spas (35-40°C). The amalgam lamp maintains consistent UV-C output across the full 0-40°C temperature range, ensuring optimal sterilisation performance regardless of spa water temperature.

Q: What is the lamp life difference between Spa and Pool models? A: The Spa Pro amalgam lamp has a 14,000 hour life compared to 9,000 hours for standard pool model lamps – approximately 55% longer life.

Q: What is trickle dosing? A: Trickle dosing splits the daily chlorine dose into multiple smaller intervals throughout filtration hours (e.g., 420ml split into 20 doses, each injected for 32 seconds). This provides more even chemical distribution compared to single or split dosing.

Q: What size spa is this suitable for? A: The HRP-30-UK-SPA is designed for spas up to 30,000 litres (30m³) with a minimum filtration turnover of three times per day.

Q: Will this fit my existing pipework? A: The unit comes with 2″/63mm stepped ABS unions plus 1½”/50mm reducers included, compatible with most spa plumbing systems.

Q: What are the flow rate requirements? A: Maximum flow rate is 12m³/h (12,000 litres per hour). Higher flow rates require a bypass installation.

Q: What voltage does this require? A: Single phase 100-240V at 50/60Hz. Maximum power consumption is 40W. Installation by a qualified electrician with 30mA RCD protection is required.

Q: Can I use the same replacement lamp as the pool version? A: No. The Spa Pro requires the amalgam lamp (part number SP-UV-LAMP-30-AM). Do not use the standard pool lamp (SP-UV-LAMP-30).

Q: Is it compatible with salt water spas? A: Yes, the H.R.UV-C Spa is 100% compatible with chlorinated salt water and sea water systems.

Q: What warranty is provided? A: 2 years within Europe, 1 year outside Europe. The warranty does not cover serviceable parts (lamps, quartz sleeves, O-rings) or damage from incorrect installation, inappropriate use or neglect.

Q: Will this eliminate the need for chemicals entirely? A: The H.R.UV-C significantly reduces chemical requirements and eliminates chlorine smell, but should be used alongside a residual sanitiser. The integrated trickle dosing pump automates this process.

Q: What happens if there’s a power cut during dosing? A: The programmed settings remain stored. When power is restored, the unit continues dosing the outstanding volume. Volume that should have been dosed during the power loss is skipped.

📥 Downloads

📄 Product Data Sheet (EN) – Technical specifications for Spa models

📄 Installation & Operating Manual (EN) – Complete installation, operation and maintenance guide

🏆 Why Choose the H.R.UV-C Spa Pro

• ✅ Amalgam lamp technology – consistent output at spa temperatures (0-40°C)
• ✅ 14,000 hour lamp life – 55% longer than standard pool lamps
• ✅ Highest UV reflective index on the market
• ✅ E-PTFE chamber maintains up to 95% UV reflection
• ✅ Digital lamp life countdown with precise monitoring
• ✅ Intelligent trickle dosing for even chemical distribution
• ✅ Destroys bacteria, viruses, algae and fungi that chemicals cannot
• ✅ No harmful gases or by-products produced
• ✅ 100% salt water and sea water compatible
• ✅ 2 year European warranty
• ✅ UK manufactured by Elecro Engineering Ltd, Stevenage

🤝 Why Buy from Parts4Tubs

• ✅ UK-based company with local support
• ✅ Fast UK delivery
• ✅ Expert advice from spa and hot tub specialists
• ✅ Competitive pricing
• ✅ Full warranty support
• ✅ Easy returns within 30 days
• ✅ Amalgam replacement lamps, quartz sleeves and parts available
• ✅ Buy from a person, not just the internet

✨ Summary

The Elecro H.R.UV-C Spa Pro (HRP-30-UK-SPA) is purpose-built for spa and hot tub applications where elevated water temperatures demand specialised UV technology. Featuring a 30W amalgam lamp with 14,000 hour life, digital countdown display, and intelligent trickle dosing for H₂O₂ or chlorine, this UK-manufactured system maintains consistent sterilisation performance across the 0-40°C temperature range. With the market’s highest UV reflective E-PTFE chamber, 100% salt water compatibility, and comprehensive automated dosing, the Spa Pro delivers professional-grade water treatment for spas up to 30m³. Backed by a 2-year European warranty, this is the ultimate solution for demanding spa environments.