Adam Shields and Andreas Jonsson produced perfect displays as Lakeside Hammers beat Coventry Bees 63-29.
Both riders had four wins from four races heading into the final heat, with Shields winning it and Jonsson coming in second for a paid maximum.
The Hammers completely dominated proceedings and that 15th heat 5-1 was the last of seven perfect heats for the hosts.
They won the first three 5-1 and never looked back, although injury-hit Coventry continued to battle throughout.
Already missing Chris Harris - injured in Saturday's British Grand Prix - the Bees lost Billy Janniro with a shoulder problem after he crashed out in the first heat.
Their five riders were always going to struggle on the Purfleet Raceway, which has become a fortress for the Hammers.
They have only lost one of their last nine home matches on this tight, technical circuit and never looked in danger against the struggling Bees.
Coventry promoter Peter Oakes admitted on Sky Sports: "It was almost mission impossible, but Lakeside are a very good team. I think we were the last team to win here at the end of last season.
"We have got an awful long way to go. This was our 10th match and some teams have ridden 20. You don't miss out on play-offs by losing at places like Lakeside, but we have got to start picking up wins. Somehow we have got to do it. We have got to get seven fit riders."
Lakeside Hammers team manager John Cook said: "Tonight has been a great performance. Everyone on the team has won a race. Hopefully it augurs well for the rest of the home season because we have still got a huge amount of home matches left particularly against the teams directly above us."

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