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?
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.
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.
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.