I see no need to buy a new sysetem just replace the pump. I like Oase aquamaxes but that flowrate the hozelok titans might be worth a look as well.
When you are shopping bare in mind not only the purchase price but the running costs. Also if you can get within £20 locally I would buy locally rather than off the net.
For me quite a few Oase pumps have the advantage of being able to connect piping directly to their inlets and the aquamaxes can be used as an external as well as a submersible.

Those aquamax pumps are good value, they can be used as submersible or external, they have a good rep, not many probs, most of the breeders in around here use them on their holding tanks for there reliability and low running costs, friend of mine has one too, well pleased with it.

If/when my central heating pumps pack up i shall replace them with one, they come in a good choice of ltrs per min too.

But if your old system is good enough for your pond why replace it?

Well, the sponges in the filter are falling apart so I will need to get a new one of those, the flexible piping refuses to stay connected properly to the in-pond filter, and the pumps a gonna, thats why i was looking to replace it all. I could just by the same thing all over again, but I would prefer not having to plunge my hand into the icy cold pond at this time of year to recover the filter from the bottom for it's weekly wash out. Was thinking of an external filter type setup.

Thanks for you ideas, will definatly look at the pumps.

Phil V

Oh if an internal filter I would definately go external. BTW with regard to hoses and hosetails be aware that metric and imperial sizes exist but that 40mm and 1.5" are NOT equivalent. A 40mm hose on a 1.5" hosetail will leak faster than the Houses of Parliament, whilst 1.5" hose on a 40mm hosetail is like trying to get a refund of charges from a bank.

A pond pump for the central heating?

Just my thoughts but surely it won't last. ?

TheyÂre not designed to pump hot water (plastic impellor and couplings) or to be constantly switched on and off.

I have 3 central heating pumps on my pond filter system, not a pond pump on my central heating lol they work well on a pond as long as they are kept dry and as long as they pump cleam water, thats why they are at the end of the mechanical filter run.

Aah, now I understand :)

They are also cheaper than pond pumps and probably at a guess use less power, good thinking, Alan are you a highlander by any chance?

Sean says "Alan are you a highlander by any chance?"

No Sean, The fens are as low laying as you can get in the UK lol (20 feet bellow sea level) :)

I use them because they are as you say cheap to buy and cheaper to run, and more often than not easier to connect up too, and often easier to get in a hurry, most places have a builders yard/ DIY store nearer than a fish dealers, in my case 25 meters lol