Davey Microlene 20" Jumbo Polyspun Sediment Filter Cartridge - WaterMark Certified, Fits 20" Jumbo Housings NZ

A high-capacity food grade polypropylene sediment cartridge — no chemical residue, no loose fibres, and nothing to add to your water.

The Davey Microlene 20" Jumbo Polyspun Sediment Filter Cartridge is made from 100% food grade polypropylene — no gaskets, binders, fillers, loose fibres, centre core, or surfactants. Every cartridge consists of thousands of thermally bonded fibres that won't shift with changes in flow or pressure. It carries WaterMark certification (WMTS-103, Lic. 22987) and is tested in compliance with AS/NZS 4020 for use in contact with drinking water.

Suits rainwater, bore, and mains water supplies. The 20" jumbo format delivers high flow rates and extended filter runs, making it well suited to larger homes or systems with higher demand. Used in the second stage of filtration for finer sediment removal, or as a pre-filter ahead of UV treatment, carbon filtration, or reverse osmosis. The 1 micron variant carries a Cryptosporidium cyst removal rating of greater than 99%.

Not cleanable. Replace every 12 months or when flow rate drops noticeably. Sold as a single cartridge.

Key Specs at a Glance

• Size: 20" Jumbo (20" × 4.5")
• Material: 100% food grade polypropylene
• Colour: White with no end caps
• Max. temperature: 63°C
• Max. flow rate: up to 164 lpm (20 micron variant)
• Thermally bonded fibres — no loose fibres or extractables
• WaterMark WMTS-103 (Lic. 22987) certified
• Tested in compliance with AS/NZS 4020
• 1 micron variant: >99% Cryptosporidium cyst removal rating

Why Kiwi Homeowners Choose Davey Microlene Polyspun

• 100% food grade polypropylene — no gaskets, binders, fillers, or surfactants to leach into your water
• Thermally bonded fibres won't shift under pressure changes, keeping captured particles locked in the cartridge
• No extractables — meets regulatory guidelines for potable water, food, and pharmaceutical use
• WaterMark and AS/NZS 4020 certified across all variants
• 1 micron variant rated for >99% Cryptosporidium cyst removal

Choosing the Right Micron

• 20 micron — General sediment: rust, sand, visible and near-visible particles. Good as a second-stage sediment filter after a coarser pre-filter.
• 5 micron — Fine sediment: removes fine particles ahead of UV or carbon filtration.
• 1 micron — Very fine sediment: captures very fine particles including Cryptosporidium cysts (>99% removal rating). Ideal as a final polish before UV treatment.

Lower micron ratings filter finer but clog faster — 1 micron cartridges will need replacing more often in high-sediment water supplies.

Full Technical Specifications

Size	20" Jumbo (20" × 4.5")
Type	Polyspun melt sediment
Material	100% food grade polypropylene
Colour	White with no end caps
Max. temperature	63°C
WaterMark	WMTS-103, Lic. 22987
Drinking water compliance	Tested in compliance with AS/NZS 4020

Flow Rates by Micron Rating

Micron Rating	Model No.	Max. Flow Rate
20 micron	20PS20J	164 lpm
5 micron	5PS20J	156 lpm
1 micron	1PS20J	152 lpm

What's in the Box

• 1 × Davey Microlene 20" Jumbo Polyspun Sediment Filter Cartridge

Compatible With

Fits most 20" jumbo housings (20" × 4.5"), including Pentair, Puretec, Trevoli, and other major brands.

Not sure if your housing takes a jumbo cartridge? Measure the inside diameter — jumbo cartridges are approximately 4.5" across, standard cartridges are approximately 2.5".

FAQ

Which micron rating should I choose?

For general sediment in rainwater or bore water, 20 micron is a solid starting point. For finer filtration ahead of UV or carbon, choose 5 micron. For maximum fine particle removal including Cryptosporidium cysts, choose 1 micron. Not sure? Get in touch and we'll help.

Can I clean and reuse this cartridge?

No. Polyspun cartridges are not cleanable. Replace when flow rate drops noticeably, or at least every 12 months.

How often do I need to replace it?

Every 12 months is the recommended interval. In high-sediment water supplies you may need to replace more frequently — when flow rate drops noticeably, it's time to replace.

Will it fit my housing?

It fits most 20" jumbo housings — those designed for a 20" × 4.5" cartridge. To check, measure the inside diameter of your housing. Jumbo cartridges are approximately 4.5" across; standard cartridges are approximately 2.5".

What do the certifications mean?

WaterMark WMTS-103 means the product has been independently tested and certified against Australian/New Zealand water industry standards. AS/NZS 4020 means it has been tested and approved for use in contact with drinking water.

Is it suitable for drinking water?

Yes — it is tested in compliance with AS/NZS 4020, meaning the materials have been independently assessed as safe for contact with potable water.

What's the difference between polyspun and pleated cartridges?

Polyspun cartridges are disposable — they cannot be cleaned and reused. They use a depth filtration structure rather than a surface filtration structure. Polyspun is typically used for finer sediment removal in the second stage of filtration; pleated cartridges are more common as a coarser first stage. Polyspun also tends to have a higher dirt-holding capacity for fine particles.

How do I know when to replace it?

When flow rate drops noticeably, it's time to replace. Don't wait for flow to stop completely — a significant pressure drop means the cartridge is loaded and your system is working harder than it should be.

Do I need special tools to change the cartridge?

You'll need a housing wrench to open the filter housing — most housings include one. Beyond that, no special tools are required.

What warranty applies?

Filter cartridges are consumables and are not covered under a product warranty. If your cartridge arrives damaged or defective, contact us and we'll sort it out.