pump preference

[tewa]

Hi guys

what do you prefer a submersible or an in line pump. Lets say both use roughly the same consumption wattage roughly the output but in line maybe 50% more expensive.

Thanks in advance

tewa

[MikeM]

Depends on the purpose. I think it is generally recognized that submersible pumps should be avoided because of the risk of submerged cords becoming frayed or a leak in the housing electrocuting fish or fishkeeper, although the risk these days may be more theoretical than real in most instances ... there is always the exception.

[woodyaht]

I doubt you could find a submersable pump that will produce the same volume of water that a external pump will for the same amperage draw.

Sequence is my preference, but I also use a Wlim Dragon for my water fall. Either of the two are the best bang for the buck!

I run 2 Sequence Cimmaron's 3600gph @ 1' of head (manufactures ratings) running 24/7 and I did a test on the wattage draw, and they use about 128 watts each, but these are low head pumps. So with the UV light and waterfall (Dragon) pump that comes on at cocktail hour, my 4000gal. pond costs me about $50-$55 a month to operate, pretty inexpensive.

[woodyaht]

Quote: Originally Posted by MikeM Depends on the purpose. I think it is generally recognized that submersible pumps should be avoided because of the risk of submerged cords becoming frayed or a leak in the housing electrocuting fish or fishkeeper, although the risk these days may be more theoretical than real in most instances ... there is always the exception.

With GFI's being the standard now a days, the risk of electrocution is pretty much nill. But ya have to use them for them to be effective

[Valarc]

I would still worry about submerged pumps. It might be rare, but I HAVE seen a GFCI fail to trip. Scared the living crap out of me too.

[dick benbow]

I have used sequence pumps for decades and have had good luck with them.
I recently acquired a wave pump as back up but haven't had to use it as yet.

[Mike Mazur]

add another to the list of happy sequence users, in my own and in higher end installs for customers.

[Ian_&_Terri]

Quote: Originally Posted by Mike Mazur add another to the list of happy sequence users, in my own and in higher end installs for customers.

Ditto that.
I've heard good things about Aqua-Flo pumps but not had the chance to get one and try out yet.


We do used submersible pumps as well for small systems, Danner's mag drives are what we prefer...

Kind Regards,
Terri

[luke frisbee]

Propeller pump....

but for the sake of argument can we consider how much longer the outside pump will last?
And if we put the submersible where it is usually suggested (in the filter bay) the damage to the fish is minimal.

[tewa]

thanks guys for your replies. Can I ask for those that support in line would you prurchase it if it was say almost 50% more expensive but the performance were really close.

I am currently using a 68ton pump at around 9ft head it is external and the electricity consumption is around 1000 watts. Its a big pump and the cost was much lower compared to if i used what was available in australia with smaller pumps.

I personally would pay for the more expensive pump if the savings and the life of the pump would equate to more money in my pockets. I have used only small submersible pumps a few thousand litres an hour so my experience is limited.

tewa