Welcome to our forum.
As far as the filter bypass goes, Marquis single pump models have zero bypass. Everything goes through the filters - period. On two pump models, the primary pump still has zero bypass. It is still filtering with no by pass when the jets are on high speed. The second pump does by pass the filters. On high speed in a Marquis Spa you still have 120gpm or 160gpm being filtered with absolutely no by pass when the jets are on high speed (120gpm on 120v convertible models and 160gpm on 220v models).
50 sq ft or 35 sq ft. Both are available. They now come from the factory with 35 sq. ft.
My question is how can the spa filter 160 gpm when there is only 70 sq ft of filtration without a bypassing??
Just a guess: The 70 sq ft of filter is the surface area of the filter cartridge. So how much water would need to pass through a square foot of filter membrabne to achieve 160 gpm?2.3 gallons per minute. Is that not possible? Or did I miss something?
What I've never understood (and maybe someone can explain it to me) is why all of these companies that "filter 100% of the water" put by-pass valves in their spas. Don't by-pass valves do exactly that....by-pass the filters?I'm anxious to hear the answers.Terminator
When you pull from 360 degrees around the filter instead of one direction (the direction of the wier gate), it's amazing what you can accomplish!
They filter without a bypass only during filtering cycles with pump on low speed. In essence, when your not using the spa.