Rainwater tank plumbing in Sale and district
Rainwater tank plumbing near Sale: pump, switching device to mains or bore, first-flush and filters, backflow protection and what plumbing a tank in costs.
Rainwater tank plumbing near Sale means connecting a tank to the house through a pump, a switching device that changes over to mains water or a bore when the tank runs low, first-flush and filtration on the inlet and supply side, and backflow protection that keeps tank water out of the drinking water main. On rural blocks with no town water, the tank may be the only supply and the pump is what keeps the taps running. A licensed plumber does the connection to the house, and the work is done to AS/NZS 3500.1, the standard for water services.
The plumbing businesses that answer enquiries through this site are independent: they inspect, quote and plumb the tank themselves, and Sale Plumber only passes your enquiry on. The about page has the detail.
Why plumb a rainwater tank into the house?
People around Sale plumb a tank in for a few reasons:
- The block is outside the town water area and the tank is the house supply.
- The household wants tank water for toilets and the laundry to cut mains water use.
- An existing tank only feeds a garden tap and the owner wants it connected to the house.
- A bore or dam supplies the garden and stock, and the house needs a cleaner source.
- The old pump has died or the switching device has stopped changing over.
Farm and lifestyle properties out toward Maffra and Stratford are where most of these jobs come from. The Maffra area page covers plumbing on the irrigation country there, and the Stratford area page covers the rural blocks around the Avon River.
What parts go into a tank-to-house setup?
| Part | What it does | What goes wrong |
|---|---|---|
| Leaf guard and first-flush diverter | Keeps leaves and the first dirty roof water out of the tank | Fills and blocks, so the tank stops filling |
| Tank outlet and isolation valve | Lets the plumber shut off the tank for pump work | Seized valve, leaking fitting |
| Pump | Pushes water to the house at usable pressure | Short cycling, loss of prime, worn seals |
| Switching device | Changes the house over to mains or bore when the tank is low | Sticks on one source without any warning |
| Filter cartridges | Remove sediment, sometimes taste and odour | Clogged cartridges drop pressure |
| Backflow device or air gap | Stops tank, dam or bore water entering the drinking water main | Fails a test, or was never fitted |
Why does the switching device need testing?
A switching device, sometimes called a rain bank or changeover valve, decides which source feeds the house. When it fails, it usually fails quietly. Many stick on mains, so the household pays for town water and never notices the tank is full. Others stick on tank, so when the tank runs dry the pump runs with nothing to push and the taps go to a trickle. Test it at least once a year: shut the mains supply at the meter, run a tap, and check the pump starts and water comes from the tank. Then run the tank low, or ask the plumber to simulate it, and check the changeover to mains happens. If you are not confident doing this, a plumber can check it during a pump service.
What are the backflow rules for a property with a tank and mains water?
Backflow is water flowing the wrong way, from a private source back into the public drinking water supply. A property that has a drinking water connection and also a tank, dam or bore has a cross-connection risk, so the plumbing must be set up with the right backflow prevention device, or a physical air gap, between the two.
Gippsland Water’s backflow prevention fact sheet says property owners are responsible for making sure backflow does not happen at their property, that a licensed backflow plumber can inspect and advise on the right device, and that backflow prevention devices must be tested every year. Ask the plumber which device your setup needs and whether it is a testable type. If you have no mains connection at all, for example a farm on tank and bore only, the backflow question shifts to keeping dam or bore water out of the drinking water tank.
Who looks after dam, river and bore water?
Licences for dams and for taking water from creeks and rivers in rural Gippsland sit with Southern Rural Water, not with the town water corporation. Gippsland Water’s who does what in water page sets out the split: town water and sewer go to Gippsland Water, rural water supply and licensing go to Southern Rural Water. A plumber can connect a bore or dam supply to your property’s plumbing, but whether you are allowed to take the water is a question for Southern Rural Water.
What does a careful plumber check before connecting a tank?
Before quoting, a good plumber will want to know or check:
- Tank size, material and how far it sits from the house.
- Whether there is a mains connection, a bore or a dam, and which fixtures each will supply.
- The roof material and gutter condition, since that is where the water comes from.
- Where the pump will sit, whether it needs a cover, and where its power comes from (the electrical connection itself is a licensed electrician’s job).
- How much fall the overflow has and where it will discharge.
- Which backflow device or air gap suits the setup.
A plumber should not connect a tank straight into a pipe that also carries mains water without the correct backflow protection, and should label tank water taps where the water is not for drinking.
How does the job usually run?
For a typical tank-to-house job, the plumber sets the pump on a level base near the tank, runs the suction line from the tank outlet, fits the switching device and filters, then runs a supply pipe to the house and ties it into the fixtures that will use tank water. The overflow is piped to the stormwater point, the backflow device is fitted and tested, and the system is commissioned by running each fixture. Ask whether trenching across lawn or driveway is included or priced separately.
How much does it cost to plumb a tank in near Sale?
The Quote Yard’s 2026 price table for Gippsland puts a rainwater tank plumbed into a house, including the pump, switching device and filtration, at $950 to $3,700. Pump repairs and fault calls are usually charged by time, and that table gives a normal-hours plumber rate of $90 to $148 per hour. Source: The Quote Yard Gippsland plumbing guide. The tank itself is extra, and so is any concrete pad. The plumbing costs guide for Sale lists the other local price bands. If you already know your tank size and pump location, you can get a price to plumb in your tank.
Does a tank interact with a septic system?
On unsewered blocks, the tank overflow, the septic tank and the disposal trenches all compete for space, and setbacks apply to the wastewater side. The septic systems page covers the council permit and the owner’s duties for the wastewater half of the property.
Next step
When you send the enquiry, list your town or road, the tank size and where it stands, whether you have mains water, a bore or a dam, which fixtures you want on tank water, and whether a pump is already there (a photo of its label helps). Mention any fault, such as the pump cycling or the changeover not working. Then send a rainwater tank plumbing enquiry and a local provider will follow up.
Frequently asked questions
- Is tank water safe to drink?
It can be, if the roof, gutters and tank are clean and the tank is sealed against animals and light, but it is not treated like town water. Many households add first-flush diverters, filters and sometimes UV treatment for drinking water. If anyone in the house is vulnerable, ask a plumber about treatment options.
- What size pump do I need for a house on tank water?
It depends on how many taps may run at once, how far and how high the water has to travel, and whether the house has a mains backup. A plumber sizes the pump on flow and pressure rather than tank size. An undersized pump gives weak showers; an oversized one cycles and wears out early.
- Why does my tank pump keep turning on and off?
Rapid on and off running usually points to a small leak in the house pipes, a failed pressure vessel or check valve, or a pressure switch out of adjustment. Turn off every tap and listen: if the pump still starts on its own, there is a leak or a valve fault to find.
- Can I connect a tank to the toilet and laundry only?
Yes, that is a common setup on town blocks. The plumber runs a separate supply from the tank pump to those fixtures and fits a switching device or mains backup so they keep working when the tank is empty, with backflow protection between the two supplies.
- How often should a rainwater tank be cleaned?
Check the gutters, leaf guards and first-flush diverter several times a year, more often under trees. Sludge builds up on the tank floor over the years; have the tank inspected every few years and cleaned when the layer gets thick, and always before putting an old tank back into use for drinking water.