Patrick Payne is considering giving New Zealand jumper Sea King his chance at a rare Grand National double.

Sea King won the Grand National Hurdle at Sandown on Sunday, making it two hurdle wins in Australia from as many starts, prompting his trainer to think seriously about running him in the Grand National Steeplechase on July 27.

The style of his jumping has convinced Payne he will have no trouble with the larger obstacles but if Sea King is to contest the $250,000 race, he would have to qualify in a trial beforehand.

"We are thinking about qualifying him for the steeples and going for the Grand National Steeple," Payne told Melbourne radio station RSN.

"He's got a massive leap on him and I think our steeples are like the New Zealand hurdles, so I think he will make the transition no problem at all.

"But it might be a bit too much. We've got to qualify him and give him another race.

"We'll just see how he pulls up in the next few days and give it some serious thought."

There are jumps trials at Cranbourne on Friday.

Mosstrooper in 1930 is the last horse to claim the Grand National double.

Sea King was sent to Payne by New Zealand trainer Kevin Myers three weeks ago and the gelding has since won the Kevin Lafferty Hurdle and Grand National Hurdle.

He formed part of a feature double for champion rider Steven Pateman on Sunday, with the jockey guiding two-time Australian jumper of the year Bashboy to his third-consecutive Crisp Steeplechase win.

Bashboy will also be aiming for a third-straight Grand National Steeplechase.

If Sea King does go to the Steeplechase, Payne is likely to have to find a new rider with Pateman committed to Bashboy.