Mr Hancock carries two litres of dialysis solution in his peritoneal cavity into which a catheter is inserted.
He says the liquid is left in long enough to pull the extra fluid and waste products from the blood.
At the intervals starting at 7am, 12pm, 5pm and 10pm, he goes into his sanitised room and prepares the solution which he has to heat to body temperature. Then he hooks it up on to a stand, attaches to the catheter and the new fluid goes to work replacing the old fluids.
He was the former president of the Wanganui Lawn Tennis and the Victoria Club. He has always been lean which came from his harrier days. But he can no longer play his sports, although he can have a round of golf and play bowls.
It's the tiredness that gets to him, and he has come to know his limitations.
"I don't have the strength in my body, and when I have the strength I make the most of it."
The fluids in his cavity means he can't run, or bend easily, and because of bruising he can't play with his grandchildren.
Cleanliness is paramount and pets are a no-no because of cat dander and dog hair.
An Auckland company sends the two-litre bags of fluids, 240kg at a time, which he keeps stored until ready for use.
On a visit to family in Australia, the company sent the fluids there.
Throughout it all, Mr Hancock remains positive. "Life has to continue," he smiles."My ability is deteriorating. I strive to think positively, but some days I don't have the energy.
"For health reasons I do not qualify for a kidney transplant."