Typhoon III Question - adding 150 GPH Membrane

[tangman99]

I'm changing all my filters and installing the 150 GPH membrane. The picture shows how the current typhoone III was setup when I bought it in 2003. Not sure if it has changed, but the new membrane comes with a flush valve flow restrictor that does not exist on my current unit and I have no idea where to install it.
In looking at the picture I believe the valve on top is the current membrane flush that runs to the black line. The other valve I believe is the DI bypass.

This is the new membrane and the restrictor that comes with it. Where does this restrictor go in my system?

I have racked my brain trying to figure out how all this stuff works. Can someone explain to me how the DI bypass even works? The line with clean water comes out of the DI chamber so how can it possibly be bypassed and water still come out of the pure water end?
Also, can someone explain simply how the plumbing works? I know water goes from chamber 1 to 2 to 3 to the membrane. When the water come out of the membrane at the two what I presume are exits, I am completely lost.
If anyone can help, I'd be very greatful. I need to make some water this weekend.
Thanks!

 

[reefraff]

The restrictor goes on the waste water line. Just install it where the current restrictor is. The valve on the new restrictor is designed to allow the water to flow through unrestricted to flush the membrane thus eliminating the need for the extra plumbing your unit has. I would just install the new restrictor and leave it's bypass valve off.
The way the system works is if you bypass the restrictor it flushes the membrane by allowing the water to flow across it without forcing any through it which is what the restrictor does.
What your DI bypass does is feed the clean water coming from your RO membrane to the waste water drain line. The reason for having that is it takes about 30 seconds of water flow before your RO membrane starts working well. So initially the RO membrane is not filtering much and there are a lot of impurities in the water. If you bypass the DI for 30 seconds you aren't sending all that crap into the DI, it goes down the drain with the waste water. This will make your DI resign last a lot longer.
Hope I didn't just confuse your more.