Can I ask if used as a main pump how long do those cheap fleebay pumps last and is it not false economy/ hassle to keep replacing them when they fail?
The 5.5lpm ones I linked to. I bought 3 of them about 2 years ago. I'm on my second one.
Its hard to say as they could last month's or years, I'm sure some shurflo pumps fail prematurely as well, there's no guaranteed life with either.
That said I run mine flat out no controller which puts a lot more strain on them than so maybe they would last longer with a good controller.
There's probably not much in it. But I'd rather buy these personally. 15 quid just seems nicer to hand over even if it is false economy.