Hunter Water says it aims to have the recycled system online in Chisholm on Tuesday, followed by Gillieston Heights on Thursday.

The confirmation comes more than five months after Hunter Water planned to have the suburbs connected to the non-potable system.

The company announced in April that more than 1100 homes would be connected to the network, saving an average of 40 per cent of the drinking water used in each household.

But residents were left frustrated when level 1 water restrictions came into effect in September and they were still not connected to the recycled system.

Some people were not even aware drinking water was still flowing through their purple "non-drinking" water taps.

Hunter Water says it encountered "technical complications relating to the reliability of the newly constructed recycled water treatment plants for Chisholm and Gillieston Heights".

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But a Hunter Water spokesperson says the company is now in the final stages of making the connection and thanked customers for their patience and understanding as they delivered the "important project".

Before providing recycled water, the spokesperson said Hunter Water needed to make a final change to remove the temporary drinking water supply from the recycled water system.

"This is a critical step, which will ensure the two water supplies are completely separate," the spokesperson said.

During this process, some customers will experience an interruption to their recycled water, while other residents will experience an interruption to both their drinking water and recycled water systems.

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"We have written to all 1100 customers to inform them of this planned shutdown," the spokesperson said.

"We aim to minimise the inconvenience by starting after the morning peak period."

The recycled water will go through a stringent recycling process and can be used for washing clothes, flushing toilets, washing cars or watering the garden.

Meanwhile, Hunter Water customers are invited to attend a public hearing in Newcastle on Tuesday to have their say on the company's pricing proposal.

The Independent Pricing and Regulatory Tribunal (IPART) will set Hunter Water's prices for a four year period from July 2020, after completing a public review.

Hunter Water's Chief Financial Officer Jennifer Hayes said revised economic modelling meant water bills for residential customers would stay the same or go down.

The public hearing will be held at Harbourview Function Centre from 10:30am to 2:30pm, followed by a drop in session until 7pm.