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Discussion Starter · #1 ·
Ok,

I've searched these forums and can't seem to find the answer.

I've been lookin to do the ttc. There are more than one method to do this.

One is this way:
http://www.mkiv.com/techarticles/ttc/ttc.htm

These have one way vacuum check valves. Why exactly are they needed?

Here is another way:
http://mkiv.supras.org.nz/articles/andy.htm

Here they don't use any at all. What will be the repercussions of this type of method?

Also the Electronic TTC here:
http://www.mkiv.com/techarticles/ettc/index.html

Still no Check Valves in this way also. It shows having the risk to damage the pressure tank, and also putting a check valve on the outlet side of the pressure tank. I guess this is to protect it?

Any input would be great. Thanks!
 
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