Champions-elect Moulton Harrox remain 20 points clear at the top of the table.
The unbeaten Premier Division leaders thrashed Ketton 5-0 at Broad Lane on Wednesday night to take another step towards the ChromaSport & Trophies Peterborough and District League title.
Ashley Coddington headed the opener 10 minutes before the break.
Ben Allen (50) and Ian Bradbury (60) made the points safe then top scorer Ollie Maltby struck on 70 and 82 minutes.
Pinchbeck United boosted their bid for runners-up spot with their 10th successive win.
They beat Deeping Rangers Reserves 6-0 through Tony Edwards (4), Jamie Francis and Bradley Murrell.
Moulton face trips to Langtoft United on Saturday and Pinchbeck on Tuesday.
EVO-STIK NORTHERN PREMIER LEAGUE
First Division South: Carlton 1 Kidsgrove 4, Shaw Lane Aquaforce 3 Goole 3.
CHROMASPORT & TROPHIES UNITED COUNTIES LEAGUE
Premier Division: Holbeach 1 Leicester Nirvana 2.
Reserve Division: Rothwell Corinthians 2 Irchester 2.
CHROMASPORT & TROPHIES PETERBOROUGH & DISTRICT LEAGUE
Premier Division: Moulton Harrox 5 Ketton 0, Pinchbeck 6 Deeping Res 0, Riverside 0 Whittlesey 9.
Division One: Baston 0 Stamford Lions 2, Netherton Res 1 Sutton Bridge 1, Wisbech Res 6 Long Sutton 3.
Division Two: Oakham Res 6 Peterborough Polonia 2, Sawtry Res 1 Whittlesey A 0.
PFA MINOR CUP
Final: Feeder 1 FC Peterborough 1 (4-3 on pens; at Peterborough Northern Star).
BALCAN LIGHTING SUPPLIES LINCOLNSHIRE LEAGUE
Market Rasen 1 Hykeham 6.
PETERBOROUGH & DISTRICT JUNIOR ALLIANCE
Under-13 Division One: Feeder 5 Deeping Claret 1.
Under-14 Division One: Gunthorpe Navy 2 King’s Lynn 0.
PETERBOROUGH & DISTRICT YOUTH LEAGUE
Under-15 Division Two: Werrington 0 R&F 5.
Under-18 Division Two: Bourne Red 0 Bourne Blue 1.