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Old 27-01-2022, 07:46   #1
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Spectra watermaker flushing

I'm reinstalling a manual Spectra 200T watermaker as part of a major refit. As far as I know, for manual flushing it's customary to have a y-valve to flush with water from the pressurized fresh water system via a charcoal filter to remove any chlorine.

Is it possible to do this without pressurized fresh water? Can I draw unpressurized fresh water through a charcoal filter into the feed pump? Is there a better way of setting up flushing without using a freshwater pump?
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Old 27-01-2022, 09:38   #2
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Re: Spectra watermaker flushing

You don't need pressurised fresh water feed, the main feed pump will suck from a static tank or even a bucket if necessary.
If you flush with product water (no chlorine) then you could use the service port.
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Old 28-01-2022, 02:30   #3
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Re: Spectra watermaker flushing

I would recommend that you do connect to your cold freshwater pressurized line. When a 200T pump starts to get tired it can be hard for them to draw a vacuum and draw water to them. They will still make enough pressure to make water but when they get tired flushing can become a problem. The positive input pressure is really what the 200T was designed for.
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Old 28-01-2022, 02:54   #4
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Re: Spectra watermaker flushing

Quote:
Originally Posted by Tellie View Post
I would recommend that you do connect to your cold freshwater pressurized line. When a 200T pump starts to get tired it can be hard for them to draw a vacuum and draw water to them. They will still make enough pressure to make water but when they get tired flushing can become a problem. The positive input pressure is really what the 200T was designed for.

Yes I agree.
I assumed the OP was looking for a "can I, is it possible" one off temporary solution.
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