Splashy the Mr Splash mascot on a Sydney lawn pointing at a filter housing and pump on a rainwater tank, Sydney Harbour at dusk behind
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Rainwater Tank Filter Installation Sydney - Tank And Bore Water Filtered

On tank or bore water and seeing dirt in the glass, a taste, or a filter that has started to leak? Our licensed plumbers fit filter housings after your pump, with isolation valves and a bypass, and agree the price before any work starts.

  • $0 call-out fee*No charge just to come and look
  • Fixed Price QuotesUpfront pricing before work starts
  • Aussie owned & operatedFamily-owned in Sydney since 2010
  • Lifetime guaranteeIf our work fails, we fix it

Free quotes · Licensed & insured · Lic #306457C

*No call-out fee during business hours, Monday to Friday 7am to 4pm. Mr Splash VIP lifetime members pay no call-out fee at any time. After-hours and weekend call-outs may attract a fee at our discretion, and we will always confirm it with you before we attend.

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Supplied and installed

Fitted after the pump, so the whole house gets it

  • On the pressure side of the pump, so a blocked cartridge cannot starve it
  • Isolation valves and a bypass, so the house keeps water during a cartridge change
  • Mounted on a wall or a post with room to change the cartridges
  • One fixed price before we start, with 0% interest payment plans
Splashy fitting a twin water filter on the brick wall of a Sydney home
Twin filter housings with isolation valves and a bypass, fitted beside the pump on a tank water supply in Wilberforce

Tank water

What Does a Rainwater Tank Filter Do?

Sediment firstA sediment cartridge catches grit, leaf matter and rust before anything else reaches the house.
Carbon for tasteA carbon stage takes out tastes, smells and colour.
Not a disinfection stepFilters do not kill bacteria or viruses. NSW Health treats disinfection as a separate step, and our rainwater guide explains it.

Looked after

Tank filters work harder than mains filters

Tank water carries more grit, so some makers set a cartridge change every 6 months. We set the schedule when we fit it, and we can come back to change them.

Splashy holding a new filter cartridge beside a used one

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Why Sydney homes pick Mr Splash

Straight answers, fixed prices, work that lasts

Fixed priceAgreed before any work starts
0% interest payment plansSpread the cost
Lifetime workmanship guaranteeOn the installation
Licensed and insuredLic #306457C
Family-owned since 2010Local Sydney plumbers
Splashy holding up a glass of clear water

How it goes in

Three steps, one visit

Copper water line and green-handled valves on the outlet of a rainwater tank in Greenacre
1Check The Tank And PumpWe look at the tank, the pump, the line into the house and the water pressure, and ask what you want the filter to fix. Then you get one fixed price before we start.
Copper water line on the wall above a slimline rainwater tank and its downpipe inlet in Marsden Park
2Fit After The PumpThe housings go on the pressure side of the pump, so a blocked cartridge cannot starve it, with isolation valves, a bypass and a pressure limiting valve where one is needed. In NSW, fitting anything that treats your water is plumbing work for a licensed plumber.
Outlet valve and pipework on top of a rainwater tank in Marsden Park
3Flush, Test And Hand OverWe turn the tank supply back on, flush the new cartridges and check every joint for leaks. Then we show you the bypass and when the cartridges are due.

Straight answers

Before you book

How much does a rainwater tank filter cost?

It depends on how many filter stages you need, whether the pipe from the tank needs replacing, and whether a pressure limiting valve and a bypass go in. It also depends on whether we supply the filter or you have bought one. You get one fixed price before any work starts, there is nothing to pay just for us to come and look during business hours, and our guide Whole House Water Filter Cost in Sydney explains what drives the price.

What filter do I need for rainwater tank water?

For dirt, taste and smell, the usual setup is a sediment cartridge followed by carbon, fitted after the pump. Carbon does not remove bacteria or viruses, so if the tank is your drinking water, read our guide Rainwater Filter for Drinking Water for what NSW Health advises. On mains water instead? Our whole house water filters and water filter installation pages cover those setups.

Do I need a UV filter on my rainwater tank?

Only if you want the water disinfected on its way to the tap. NSW Health's rainwater treatment fact sheet says carbon will not remove bacteria or viruses and a sediment cartridge will not remove viruses, while UV is effective against most bacteria, viruses and protozoa on clear water. UV needs power and filters ahead of it, and it does not remove chemicals. NSW Health also says a well-maintained tank can provide good-quality drinking water, and recommends town water for drinking where you have it.

Does a tank filter go before or after the pump?

After the pump, on the pressure side. A blocked cartridge before the pump can starve it of water, so the filter goes on the line between the pump and the house, with valves either side so it can be isolated.

How often do tank water filter cartridges need changing?

On the maker's schedule, which for most sediment and carbon cartridges is every 6 to 12 months, and as often as every 6 months on some tank water systems. Rainwater clogs filters quickly, and a cartridge left too long can trap sludge and slime that a change in pressure flushes back into the water, so write the date on the housing. Our guide How Often to Change Water Filter Cartridges lists the makers' intervals.

Can you fit a filter on bore water?

Yes. Where a bore supply feeds the house, the filter housings go on the line after the pump in the same way as on a tank. NSW Health says bore water should be tested at a laboratory before use, and sediment and carbon filters do not remove every chemical a bore can carry, so have the water tested first and choose the filter to suit the result. We fit the filtration; we do not drill or treat bores.

Do I need a plumber to install a rainwater filter?

Yes, if it connects to the water line. In NSW, fitting anything that treats your water is plumbing work, and filters must be WaterMark certified and installed by a licensed plumber. Changing a cartridge afterwards is often a job you can do yourself. Our guide WaterMark Certification for Water Filters explains what to check before you buy.

Do you fix rainwater tank pumps too?

Yes. Pumps, rain to mains switches and leaking tank fittings are covered on our rainwater tank and pump repairs page, and a pump fault can be looked at in the same visit as the filter.

Filtered Tank Water, Fitted Properly.

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Licensed & insured · Lic #306457C · Family-owned since 2010

Splashy carrying a filter housing up the driveway past the Mr Splash ute