Trevoli Whole House UV Filtration System - Option 2, Rainwater & Tank Water, 55W NZ

Twin-housing UV filtration for rainwater and tank water. This system combines two Big Blue 10 inch jumbo filter housings with a 55W UV chamber to destroy bacteria, viruses, and micro-organisms including E.coli, Cryptosporidium, Campylobacter, and Giardia — without chemicals.

Stage 1 catches coarse sediment with the 20 micron polypleated cartridge. Stage 2 removes fine particles with the 1 micron polyspun cartridge. Clear, filtered water then enters the 55W UV chamber for microbiological treatment.

The UV unit uses a Deluxe Countdown Timer Ballast that tracks hours of lamp operation and counts down remaining lamp life — so you always know when the lamp is due for replacement.

Suited to medium 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 ballast and lamp from power surges and cuts)

Bracket type (select from dropdown):

• Standard powder-coated 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)
• Powder-coated bracket
• Housing spanner
• 25mm BSP (1 inch) connections

UV Unit — 55W UV Chamber with Countdown Timer Ballast

• 1x 55W UV chamber (910mm long, 2.5 inch diameter)
• 1x 55W replaceable UV lamp
• 1x Deluxe Countdown Timer Ballast
• UV port: 20mm (3/4 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

Water flows through the 55W UV chamber where it is exposed to ultraviolet light, destroying 99.99% of harmful micro-organisms including E.coli, Cryptosporidium, Campylobacter, and Giardia. No chemicals are added.

The Deluxe Countdown Timer Ballast tracks hours of UV lamp operation and counts down the remaining lamp life. When the countdown reaches zero, the lamp needs replacing — regardless of whether it is still glowing. UV output degrades before the lamp visibly fails.

Important — surge protector recommended

Power surges and cuts can damage the UV ballast and lamp. 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 ballast and lamp. 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	55W
UV chamber	910mm x 2.5" diameter
UV port size	20mm (3/4 inch)
Recommended flow	45 LPM (30 mJ/cm²)
Council recommended flow	33 LPM (40 mJ/cm²)
Max flow	84 LPM (16 mJ/cm²)
Temperature range	2–40°C
Ballast	Deluxe Countdown Timer
Connection fittings	Not included
Warranty	2 years back to base / Pro rata on UV lamp

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
• Powder-coated bracket (unless stainless steel or stand selected)
• Housing spanner

UV unit (ships separately):

• 55W UV chamber
• 55W UV lamp
• Deluxe Countdown Timer Ballast
• Surge protector (if selected)

Frequently asked questions

What micro-organisms does the UV unit treat?

The 55W UV chamber destroys 99.99% of harmful micro-organisms including E.coli, Cryptosporidium, Campylobacter, and Giardia — without chemicals or additives.

What is the council recommended flow rate?

The council recommended UV dose is 40 mJ/cm² — achieved at a maximum flow rate of 33 LPM through this system. For installations where water quality compliance is a priority, keep flow within 33 LPM to maintain this dose level.

What is the Countdown Timer Ballast?

The Deluxe Countdown Timer Ballast tracks the total hours of UV lamp operation and counts down the remaining lamp life. When the countdown reaches zero, replace the lamp — don't wait for the lamp to stop glowing. UV output degrades before the lamp visibly fails, so the countdown is the most reliable indicator of when replacement is due.

Why do I need a surge protector?

Power surges and sudden power cuts can damage the UV ballast and lamp. 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 lamp carries a pro rata warranty. Damage caused by power surges may affect warranty outcomes on the ballast and lamp — a surge protector is strongly recommended.