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Re: filter flow
- To: Aquatic-Plants at actwin_com
- Subject: Re: filter flow
- From: Chuck Gadd <cgadd at cfxc_com>
- Date: Wed, 09 Aug 2000 02:53:49 -0600
- Delivered-To: fixup-Aquatic-Plants at actwin_com@fixme
- References: <200008090748.DAA10529 at actwin_com>
> > If the pump uses an impeller, you should restrict the output flow, not the
> > input flow. Reducing the input will destroy the pump.
> Then, how come cannister filters place the media on the intake side of the
> impeller assembly - isn't this effectively the same as reducing the input
> flow? I understand that this is done to give suction, rather than pressure,
> inside the cannister - making any leaks less of a trouble, but at the
> expense of the motor? What am I missing here?
I'm not sure. I don't use canister filters, so I don't know if
there are other safeguards in there to keep things safe, or if
the pump works differently than powerhead impellers. I do
specifically remember reading (but now I can't remember where!)
that for powerheads and impeller based submersible pumps, that
the output should be restricted, not the input.