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Drain valve - where to plumb in?

post #1 of 6
Thread Starter 
For my new 900d build, I have Koolance valves for draining the loop, but I'm having trouble mentally visualizing where you plumb them in: Between the reservoir and the pump? In the return line back to the reservoir? Off of a tee fitting, like we all used to do with fill tubes?
I've been studying build logs that I spot here, and other places, but I haven't been able to get a good idea of where in the loop they are, and how they are plumbed in.
My current 800D has a "sealed loop" with a few quick disconnects for disassembly, but no dedicated drain port. I just take the loop apart and take a compression fitting apart at one end to drain it.
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post #2 of 6
Generally you want to put your drain at the lowest point in the loop so that gravity will do the work for you when you want to drain it. It doesn't do you any good having it at the top of the loop if all of the water just stays in the system.

In my own system, I have a T-line drain immediately after my reservoir before the pump, It fills with. When I swing it out of the case it hangs about 6 inches down from the rest of the system and drains nicely into a bucket.
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post #3 of 6
Yes, lowest point or as close to it as you can.

Ignore the location of your pump as you shouldn't be using your pump when draining the loop.

It is also a good idea to make sure that the valve is easily accessible - there is no point in having a drain port that sits in the middle of your case.

I have mine on my lower rad:
Photo (Click to show)
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Diagram (Click to show)
drain arr.PNG
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post #4 of 6
Thread Starter 
OK, so with the 900D, and what I plan to do, hanging it off the lower radiator bung seems like an ideal place for it.
Gonna have to go and order a couple of Tee fittings now, since I don't have one, and I want to retrofit my 800D, too, which will still have it's own loop in it.
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post #5 of 6
Quote:
Originally Posted by Muskaos View Post

OK, so with the 900D, and what I plan to do, hanging it off the lower radiator bung seems like an ideal place for it.
Gonna have to go and order a couple of Tee fittings now, since I don't have one, and I want to retrofit my 800D, too, which will still have it's own loop in it.

off the bottom radiator is a pretty good spot, If your rad has only 2 ports they'll be facing inwards to you might need a 90 deg adaptor to get the port to point out the side or the back (so you can get to it by unscrewing the second PSU panel)
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post #6 of 6
Thread Starter 
I have a bunch, they are sitting next to the case waiting on my tubing order to show up tomorrow. smile.gif
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