Trevoli Big Blue 10 Inch Twin Filter Housing - Option 2, Rainwater & Tank Water NZ

Two-stage sediment filtration for rainwater and tank water. This twin 10 inch jumbo filter housing set comes pre-fitted with a 20 micron polypleated first stage and a 1 micron polyspun second stage — covering coarse sediment through to fine particles in a single pre-assembled system.

Suited to medium homes on tank or rainwater supply. The 1 micron second stage filters at a scale that physically blocks Giardia cysts, which are common in unprotected rainwater and surface water supplies.

Housing arrives assembled with spanner and standard bracket. Select your bracket or stand option and pressure gauge from the dropdowns.

Key specs at a glance

• Housing size: 10 inch jumbo (twin set)
• Inlet/outlet: 25mm (1" BSP), brass lined
• Stage 1: 10PL20 — 20 micron polypleated sediment (cleanable and reusable)
• Stage 2: 10PP01 — 1 micron polyspun sediment
• Maximum operating pressure: 125 PSI
• Material: Food-grade, quality brass lined ports
• Pressure relief button: Yes (air bleeder on each housing)
• Comes assembled with spanner and bracket
• Warranty: 2 years (housing)

Configure your set

Bracket/stand (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 included

Stage 1 — 10PL20, 20 micron polypleated sediment

Catches coarse debris, silt, sand, and larger particles from tank water. The pleated design provides a large surface area for high dirt-holding capacity. Cleanable and reusable — rinse between replacements to extend its life.

Stage 2 — 10PP01, 1 micron polyspun sediment

Fine sediment filtration at 1 micron. Removes fine silt, clay particles, and other small suspended matter. At 1 micron, the filter physically blocks Giardia cysts — common in unprotected rainwater and surface water supplies. Not reusable — replace when flow drops.

Replace both cartridges every 6–12 months depending on your water quality and usage. In high-sediment water the Stage 1 pleated filter can be rinsed between replacements to extend its life.

Why choose this system

• Two-stage sediment filtration — 20 micron coarse stage followed by 1 micron fine stage
• 1 micron rating physically blocks Giardia cysts
• Stage 1 is cleanable and reusable — rinse and reinstall to extend time between replacements
• Quality brass lined 1 inch inlet and outlet — durable and corrosion-resistant
• Powder-coated bracket included — optional stainless steel upgrade or freestanding stand
• Optional pressure gauge — monitor filter life without guessing
• 2-year warranty on housing

Technical specifications

Model	BB-OPT2
Housing size	10 inch jumbo
Cartridge size	10" x 4.5"
Inlet/outlet	25mm (1" BSP), brass lined
Stage 1	10PL20 — 20 micron polypleated sediment (cleanable)
Stage 2	10PP01 — 1 micron polyspun sediment
Maximum operating pressure	125 PSI
Mounting	Powder-coated bracket (included) / Stainless steel bracket / Stand (upgrades)
Assembly	Pre-assembled with spanner
Warranty	2 years (housing)

What's in the box

• 2x Big Blue 10 inch jumbo filter housings (pre-mounted)
• 1x 10PL20 — 20 micron polypleated sediment filter
• 1x 10PP01 — 1 micron polyspun sediment filter
• Housing spanner
• Standard powder-coated bracket (unless upgrade selected)
• Pressure gauge (if selected)
• Stainless steel bracket or stand (if selected)

Frequently asked questions

Why two stages instead of one?

The two stages work together. The 20 micron pleated first stage catches larger particles and protects the finer 1 micron second stage from loading up too quickly. Running a 1 micron filter alone on tank water would clog it rapidly — the coarse first stage significantly extends the life of Stage 2.

Does the 1 micron filter remove Giardia?

At 1 micron, the polyspun filter physically blocks Giardia cysts, which are typically 8–12 microns in size. This is a physical size exclusion — the cysts are too large to pass through the filter media. For complete protection against all waterborne pathogens, a UV treatment stage is recommended in addition to filtration.

Can I clean the Stage 1 filter?

Yes — the 20 micron polypleated cartridge is cleanable and reusable. Rinse under a tap when flow drops, and reinstall. Replace when it no longer recovers after cleaning or when it's visibly damaged.

Is this suitable for mains water?

This system is configured for rainwater and tank water sediment removal. For mains water, the priority is typically chlorine and taste reduction — get in touch and we'll point you to the right option.

When do I replace the filters?

Every 6–12 months depending on your water quality and usage. In high-sediment water — common after heavy rain or in summer — you may need to replace more frequently. The clearest sign is a drop in water pressure or flow rate.

What's the difference between the bracket and stand options?

The standard and stainless steel brackets mount the housings to a wall. The stand is a freestanding combined stand and bracket unit — it doesn't require wall mounting, which suits installations where wall mounting isn't practical.

Should I add a pressure gauge?

A pressure gauge lets you monitor the pressure drop across the filters — when pressure drops noticeably it's a reliable sign the cartridges need replacing. Useful if you want to track filter life without guessing.

Do I need a plumber to install it?

For most customers, yes — a licensed plumber is the safest path. The set uses standard 25mm BSP fittings and arrives assembled with a housing spanner. If you're confident with household plumbing, the installation is straightforward. Get in touch if you're unsure.

What warranty does it come with?

2 years on the housing. Filter cartridges are consumables and don't carry a standard product warranty.