The sides were level at 5-5 after two quarters and again at 8-8 early in the last before goals by Danny Evans (2) and James Hadlow completed a successful weekend for the Midlanders.
Promoted York City also began with two wins in Division Four - 11-10 against Basildon, then 11-8 against Watford.
Polytechnic women's team, having lost to Devonport 11-6 in Division Three, hit back with a 10-3 victory over Sunderland.