M
Mickyplumb
Mike Jackson the "fastest spanners in the west!", joking aside ive had my Knipex pliers wrench for about 5-6 years now and only really use the 12" one for pump nuts now, i just prefer to have a single handle in my hand so tend to use a 24/26m open ended spanner for 15mm fittings and a 30/32mm spanner for 22mm and 3/4 fittings although you can bet the day you leave your adjustables in the van is the day the lifts dont work in the high rise flats.
Adam, I think the fact that you 'reserve' your plier wrenches for pump nuts answers it all. Let's be honest, they are normally the most seized nuts we ever come across in our pllumbing day. Also, they don't distort and clamp the nuts down onto the pump thread like stilsons/footprints/pump pliers.