One filter that catches the dirt before it clogs your cartridge.
Sixteen cyclones spin the heavy dirt out first, then a 250 square foot cartridge polishes what is left. You clean the cartridge less often, and a clear window shows you when to flush.
Spin the dirt out. No media to clog.
A MultiCyclone has no moving parts and no filter media. Water goes in sideways, spins hard, and the heavy dirt is thrown outward and drops into a clear chamber. The cleaner water leaves from the middle.
- 1Tangential entryWater enters 16 hydrocyclones at an angle, which creates a strong centrifugal force.
- 2Sediment separationHeavier particles are spun outward and spiral down into the clear sediment chamber, where you can see them.
- 3Clean water exitThe cleaner water flows to the centre of each hydrocyclone and leaves.
Why it matters on your pool
The dirt gets caught first, so the filter behind it does less work.
No media to clean
The cyclone stage has no sand and no cartridge in it. You open a drain or purge to clear the sediment instead of backwashing or hosing an element.
Heavy dirt goes first
The heavier stuff drops out ahead of the cartridge or sand filter. Waterco says that means longer cartridge life, less cleaning and less water used.
It does not choke as it fills
For the MultiCyclone 12 and 16, Waterco says the flow rate stays the same as the cyclone catches more and more dirt.
Waterco rates the MultiCyclone 12 and 16 pre-filters at up to 80% of the incoming dirt load. On a sand filter that can cut backwashing to once a year, saving up to 7,000 litres of water a year on an average home pool. On a cartridge filter, cleaning can drop to once a season, or even once a year, depending on cartridge size. Waterco does not publish a dirt percentage for the DUO.
MultiCyclone DUO 250, seven things to know
Cyclone filtration and a cartridge in one compact tank. Waterco's own labelled cutaway is on the left.
Easy to read pressure gauge
Watch filter performance at a glance.
One piece moulded polymer tank
Strong, and resists cracking, corrosion and UV, for a long life.
Locking ring and lifting lug
Press the plunger, turn the ring, lift the lid and ring together.
Extended cartridge life
Cartridge cleaning drops, which saves time and money.
Clear sight glasses
See the sediment build up before it becomes a problem.
Large drain port
Quicker, more thorough flushing of the sediment chamber.
50mm quick connect barrel unions
Simple to connect and disconnect UPVC pipe sections.
Turn, lift, done.
Turn the lock ring clockwise to lock the lid. To change the cartridge, press and hold the lock plunger and turn the ring anti-clockwise at the same time.
The lifting lug in the lid lifts the lid and the ring together, so you get quick, easy access to the cartridge.
DUO 250, the numbers
MultiCyclone DUO 250
Head loss against flow, from the Waterco brochure.
Dimensions in mm, from the Waterco brochure.
Fitting a MultiCyclone in a pool system? Do not add granular pool chemicals through the skimmer box unless you can bypass it. Add all pool chemicals and additives as the maker's instructions say. Warranty terms are Waterco's, see their conditions.
Pick your MultiCyclone. Prices include GST.
Free shipping on orders over $300. Pick up at Waihi or Kopu if you would rather. Size it by your pump flow, not your pool volume.
The pick
MultiCyclone DUO 250
One compact tank does the cyclone stage and the filtering. It suits pumps up to 500 L/min, so it covers a lot of pools, and it replaces a separate filter and pre-filter.
- 50mm unions, 50 to 500 L/min
- 250 sq ft cartridge, 23.2m2
- 10 year tank warranty
Cyclone and cartridge in one housing
The Plus and Ultra put a cyclone stage and a pleated cartridge in one compact unit that stands on the pump. Waterco says the cyclone stage can stretch the cartridge capacity up to 5 times.
MultiCyclone 12 Plus C40
Above ground and small to mid sized pools, up to 73,000 litres. Stands upright on the pump, so it suits a tight pad.
- 40mm unions, 40 to 152 L/min
- 40 sq ft cartridge, 3.7m2
- 2 year warranty
MultiCyclone 16 Plus C40
Same filter and flow as the 12 Plus, with 50mm ports. Pick it when your pipework is 50mm and you want to skip reducers.
- 50mm unions, 50 to 152 L/min
- 40 sq ft cartridge, 3.7m2
- 2 year warranty
MultiCyclone 12 Ultra C75
Small to large in ground pools, up to 108,000 litres, with 40mm pipework and a pump up to 225 L/min.
- 40mm unions, 40 to 225 L/min
- 75 sq ft cartridge, 6.9m2
- 2 year warranty
MultiCyclone 16 Ultra C75
Small to large in ground pools, up to 134,000 litres, with 50mm pipework and a pump up to 280 L/min.
- 50mm unions, 50 to 280 L/min
- 75 sq ft cartridge, 6.9m2
- 2 year warranty
Pre-filter only
A pre-filter does not filter on its own. It goes between the pump and your existing sand or cartridge filter and takes the heavy dirt off it.
MultiCyclone 12
Goes before your sand or cartridge filter. For 40mm pipework and pumps from 40 to 300 L/min.
- 40mm unions, 40 to 300 L/min
- No filter media to clean
- 2 year warranty
MultiCyclone 16 GEN2
Goes before your sand or cartridge filter. For 50mm pipework and pumps from 50 to 500 L/min.
- 50mm unions, 50 to 500 L/min
- No filter media to clean
- 2 year warranty
MultiCyclone PRO
The 16 style pre-filter for plumbing that runs above the 350 kPa limit of the 12 and 16. Waterco rates the PRO at 690 kPa (100 psi).
- 50mm unions, 50 to 500 L/min
- 690 kPa (100 psi), per Waterco
- No filter media to clean
MultiCyclone PRO 7 Bar
The PRO in its 7 bar version. Ring us to confirm the rating suits your job before you order.
- 50mm unions
- 7 bar
- No filter media to clean
Not sure which one? Tell us your pump model and pipe size and we will say which MultiCyclone fits. Ring Gina on 027 322 4200.
Side by side
Figures are from the Waterco brochures. The cartridge models top out at the flow their cartridge can handle.
Waterco publishes 690 kPa (100 psi) for the PRO. We list a separate PRO 7 Bar, so ring us to confirm its exact rating before you order for a high pressure job. Waterco's brochures give a pool size for the Plus and Ultra only.
See one working
An independent review, made by Social Family Reviews on YouTube. It is not made by Waterco or by Pump Stuff, and it covers the MultiCyclone pre-filter. The DUO uses the same centrifugal technology.
Frequent questions
The DUO, Plus and Ultra are filters as well, so no. The MultiCyclone 12, 16 and PRO are pre-filters only. They go between the pump and your existing sand or cartridge filter, so you keep that filter.
The DUO 250 has a 250 sq ft cartridge and takes pumps up to 500 L/min, with a 10 year tank warranty. The Ultra has a 75 sq ft cartridge and tops out at 225 or 280 L/min depending on the size. If your pump is bigger than 280 L/min, the DUO is the one.
By your pump flow and pipe size. The 12 models use 40mm pipework, the 16 and the DUO use 50mm. Check the flow range on the model you want against your pump. Tell us your pump and we will confirm.
It spins out heavier particles. Keep your skimmer basket in for leaves and other floating debris.
On the DUO you watch the clear sight glass and flush the sediment out through the large drain port. On the 12 and 16, open the purge valve and about 15 litres goes to waste. The cartridge models still have a cartridge to clean now and then, only far less often.
Waterco strongly recommends you do not add granular pool chemicals through the skimmer box unless you can bypass the MultiCyclone. Add all chemicals the way the maker's instructions say.
Yes, or use a pool installer or plumber. It plumbs in after the pump. Warranty applies when the install follows the supplied install guide. Ring us if you are unsure.
The DUO has 10 years on the tank, 3 years on the MultiCyclone components and 1 year on everything else and labour. The other MultiCyclones carry 2 years plus 1 year on labour. Commercial installations are 1 year. Waterco's warranty conditions apply.
Talk to Gina, our pool expert
Not sure which MultiCyclone suits your pump and pipework? Ring or email Gina before you buy. Straight answers, no pressure.
Less cartridge cleaning. More swimming.
Waihi and Kopu/Thames stores. Ring 07 863 8064.