Keith Curle's men have now claimed 16 points out of the past 18 available to them, and have moved up to fifth place in the table.
The performance in the win over the managerless Mariners was far from a pretty one, but it proved to effective and that is what counts.
So which players shone as the rain poured down at Sixfields?
Take a look at what our man Jeremy Casey thought with his match ratings...
5. Scott Wharton
Another goal for the loanee from Blackburn, and it was a good one. Did okay, but there were lapses in concentration at the back... 6.5 | Getty
6. Nicky Adams
A vintage Nicky Adams performance. Tricky and progressive in open play, deadly accurate from set-plays. A masterclass... 8 CHRON STAR MAN | Getty
7. Chris Lines
Arguably his best performance in a Cobblers shirt. Offered the defence protection, and showed some neat touches and good vision.... 7.5 | Getty
8. Alan McCormack
The Irishman got through 90 minutes and was as influential as he has been in recent weeks. Sprayed some beautiful passes around too... 7.5 | Getty