Trevoli Whole House UV Filtration System - Option 4, Rainwater & Tank Water, 110W NZ

High-capacity twin-lamp UV filtration for large homes on rainwater and tank water. This system combines two Big Blue 10 inch jumbo filter housings with a powerful 110W UV chamber — running two 55W lamps simultaneously — to destroy bacteria, viruses, and micro-organisms including E.coli, Cryptosporidium, Campylobacter, and Giardia at flow rates up to 168 LPM.

Two stages of sediment filtration prepare the water before it reaches the UV chamber. The 110W UV chamber is suited to large homes and high-demand rural properties where higher flow rates are needed without compromising UV dose.

Each of the two 55W lamps has its own ballast — one regular ballast and one Deluxe Countdown Timer Ballast. The Countdown Timer tracks lamp operating hours so you always know when replacement is due.

Suited to large homes on rainwater or tank supply. Note: bore water quality varies significantly — we recommend testing your bore water before purchasing to ensure this configuration suits your supply.

Ships as two separate items. Connection fittings are not included — a licensed plumber will need to make the connections between the filter housings and UV unit.

Configure your system

Surge protector (select from dropdown):

• No surge protector
• Surge protector (recommended — protects the ballasts and lamps from power surges and cuts)

Bracket type (select from dropdown):

• Standard integrated mounting bracket (included)
• Stainless steel bracket (upgrade)
• Stand (upgrade) — freestanding combined stand and bracket unit

Pressure gauge (select from dropdown):

• No pressure gauge
• Pressure gauge (add-on)

What's in the system

Filter Housings — Twin 10 Inch Big Blue

• 2x 10 inch Big Blue jumbo filter housings
• 1x 20 micron polypleated sediment cartridge (10" jumbo) — cleanable and reusable
• 1x 1 micron polyspun sediment cartridge (10" jumbo)
• Integrated mounting bracket
• Housing spanner
• 25mm BSP (1 inch) connections

UV Unit — 110W UV Chamber (2x 55W Lamps)

• 1x 110W UV chamber (910mm long, 5 inch diameter)
• 2x 55W replaceable UV lamps
• 2x Quartz sleeves
• 1x Regular ballast
• 1x Deluxe Countdown Timer Ballast
• UV port: 25mm (1 inch)

Note: connection fittings between the filter housings and UV unit are not included.

How the system works

Stage 1 — Coarse Sediment

The 20 micron polypleated cartridge removes larger particles, silt, organic matter, and debris. Cleanable and reusable — rinse between replacements to extend its life.

Stage 2 — Fine Sediment

The 1 micron polyspun cartridge removes fine silt and particles. At 1 micron, the filter physically blocks Giardia cysts. Clear water at this stage is essential for effective UV treatment downstream.

Stage 3 — UV Sterilisation (110W)

Water flows through the 110W UV chamber — powered by two 55W lamps running simultaneously — where it is exposed to ultraviolet light, destroying 99.99% of harmful micro-organisms at flow rates up to 168 LPM. No chemicals are added.

Each lamp is powered by its own ballast. The Deluxe Countdown Timer Ballast tracks hours of lamp operation and counts down remaining lamp life. When the countdown reaches zero, replace both lamps — UV output degrades before the lamp visibly fails.

Important — surge protector recommended

Power surges and cuts can damage the UV ballasts and lamps. Installing a surge protector is strongly recommended to protect the unit — and note that damage caused by power surges may affect the outcome of your warranty claim on the ballasts and lamps. Select the surge protector option in the dropdown to add one to your order.

A note on bore water

Bore water quality varies significantly from site to site. Filtration and UV treatment alone may not be sufficient depending on your bore's mineral content, bacterial load, or other characteristics. We recommend having your bore water tested before selecting a filtration system — get in touch and we'll help you interpret the results and confirm this is the right configuration for your supply.

Key specs at a glance

Housing size	10 inch jumbo (twin)
Stage 1	20 micron polypleated sediment (cleanable)
Stage 2	1 micron polyspun sediment
Filter connection	25mm BSP (1 inch)
Max filter pressure	125 PSI
UV lamp	110W (2x 55W lamps)
UV chamber	910mm x 5" diameter
UV port size	25mm (1 inch)
Recommended flow	90 LPM (30 mJ/cm²)
Council recommended flow	66 LPM (40 mJ/cm²)
Max flow	168 LPM (16 mJ/cm²)
Temperature range	2–40°C
Ballasts	1x regular + 1x Deluxe Countdown Timer
Connection fittings	Not included
Warranty	2 years back to base / Pro rata on UV lamps

What's in the box

Filter housings (ships separately):

• 2x 10 inch Big Blue jumbo filter housings
• 1x 20 micron polypleated cartridge
• 1x 1 micron polyspun cartridge
• Integrated mounting bracket (unless stainless steel or stand selected)
• Housing spanner

UV unit (ships separately):

• 110W UV chamber (2x 55W lamps)
• 2x 55W UV lamps
• 2x Quartz sleeves
• 1x Regular ballast
• 1x Deluxe Countdown Timer Ballast
• Surge protector (if selected)

Frequently asked questions

What micro-organisms does the UV unit treat?

The 110W UV chamber destroys 99.99% of harmful micro-organisms including E.coli, Cryptosporidium, Campylobacter, and Giardia — without chemicals or additives.

Why does Option 4 use two lamps?

The 110W chamber runs two 55W lamps simultaneously to deliver a higher UV dose at higher flow rates. This makes it suitable for large homes and high-demand applications where a single 55W lamp would not maintain the required UV dose. Each lamp has its own ballast — one regular and one Deluxe Countdown Timer.

When should I replace the lamps?

Replace both lamps when the Countdown Timer Ballast reaches zero — don't wait for a lamp to stop glowing. UV output degrades before the lamp visibly fails. Replace both lamps at the same time to maintain consistent UV dose across both chambers.

What is the council recommended flow rate?

The council recommended UV dose is 40 mJ/cm² — achieved at a maximum flow rate of 66 LPM through this system. For installations where water quality compliance is a priority, keep flow within 66 LPM to maintain this dose level.

Why do I need a surge protector?

Power surges and sudden power cuts can damage the UV ballasts and lamps. A surge protector prevents this. It is strongly recommended — and note that damage caused by power surges may affect the outcome of your warranty claim. Select the surge protector option in the dropdown.

Does it include connection fittings?

No — connection fittings between the filter housings and UV unit are not included. A licensed plumber will need to make these connections.

Do I need a plumber to install it?

Yes — we recommend a licensed plumber for installation. The filter housings and UV unit need to be plumbed in sequence, and the UV unit must be the last stage before water enters the home.

Is this suitable for bore water?

It can be, but bore water varies significantly from site to site. We recommend testing your bore water before ordering — get in touch and we'll help you confirm this is the right configuration for your supply.

What warranty does it come with?

2 years back to base on the system. The UV lamps carry a pro rata warranty. Damage caused by power surges may affect warranty outcomes on the ballasts and lamps — a surge protector is strongly recommended.