Mark Noble scored twice as West Ham eased past West Brom to reclaim fifth place in the Premier League table.
The hosts had the best opportunities in the opening 15 minutes, but the Hammers soon took control.
Cheikhou Kouyate’s header opened the scoring and the midfielder then set up Mark Noble, whose scuffed effort made it 2-0 before the break.
And Noble grabbed a second – his fourth goal in two games – when he volleyed home from Andy Carroll’s ball in.
The Hammers, now unbeaten in 10 league matches, leapfrog Manchester United, who play leaders Leicester on Sunday.
And they have now reached their highest ever points haul in the Premier League with 59.
But the result leaves Tony Pulis’ Baggies without a win in seven games.
- Relive West Ham’s win over West Brom
- Reaction to Saturday’s Premier League matches
West Ham have not lost a league game since their 1-0 defeat by Southampton in February and they look well set for a top-six finish – and a Europa League place.
Against a poor West Brom side, Dimitri Payet was impressive once again for the Hammers and he played a big part in two of the three goals.
The Frenchman had just switched to the right wing when he collected the ball and sent in an accurate cross for Kouyate to head in on 34 minutes.
Kouyate then turned provider when he raced forward unopposed and fed Noble, who managed to poke past Ben Foster on the stroke of half-time.
And it was Payet’s weaving run which led to West Ham’s third. The 29-year-old found Carroll out on the left, and the England striker’s looping ball over the top was drilled in with force by Noble.
Leko: born in 1999
With West Brom’s top-flight status all-but secure, Pulis handed a starting berth to 17-year-old Jonathan Leko – and he became the first player born in 1999 to start a Premier League match.
The young winger made an immediate impact, too, as he glided through the West Brom defence and supplied Craig Gardner, who saw two efforts kept out.
Leko then tricked his way forward again, but Gardner could only head wide of the target.
As the teenager’s impact faded, and the Hammers took the lead, West Brom rarely looked a threat.
Striker Salomon Rondon had only four touches in the box all game, and their best effort in the second half was sent wide of the post by substitute Saido Berahino.