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View Full Version : temperature mixing valve



rickztahone
07-09-2010, 02:17 PM
thanks to Van, and that's a big thanks since i've been bothering him for quite some time now, i have almost finished my temp mix valve install. i attached some pics for those of you that might want to try something similar down the line. i'm sorry for the blurry pictures, i couldn't take them because i had to be holding up the whole thing, lol. i have the water feed ready to go, i just need to regulate the temp coming out of the valve. also, i need to install the drain which will go right in the middle of where the valve is and will shoot to the outside wall and then via pvc pipe will ultimately end up in the front lawn. so, it will be a lot less time consuming to do wc's now. i'm kind of glad i didn't sell the whole setup off. now, to the pics:
http://i21.photobucket.com/albums/b284/rickztahone/discus%20tanks/P7080257.jpg
mounted to wall. had to hit a stud to support the valve so it wouldn't move.
http://i21.photobucket.com/albums/b284/rickztahone/discus%20tanks/P7080258.jpg
shot of the temp knob
http://i21.photobucket.com/albums/b284/rickztahone/discus%20tanks/P7080259.jpg
couldn't hold it up from this far back, lol
http://i21.photobucket.com/albums/b284/rickztahone/discus%20tanks/P7080260.jpg
jerry-rigged u bend, keep in mind that i haven't glued everything yet, just hand tightened for the moment.
http://i21.photobucket.com/albums/b284/rickztahone/discus%20tanks/P7080261.jpg
this is the height the tank rim will have
http://i21.photobucket.com/albums/b284/rickztahone/discus%20tanks/P7080262.jpg

all in all, i'm happy with the setup. valve cost me only like 32 shipped. parts and all was like 40 bucks at hoome depot. the hoses were the most expensive. and i also got a 6 ft vinyl hose so that initially the tank doesn't get super cold water. not sure how i'm going to have the hose when it is not in use. i wouldn't want it to be visible when not in use, any ideas? i wouldn't be able to remove/install every wc because of the ribbed part of the outlet. hope that makes sense.

anyway, any more idea? thanks for viewing.

DiscusOnly
07-10-2010, 11:47 AM
Ricardo,

Looking good. I have a few suggestions.

1. Are you putting a ball valve on the end? How are you turning on and off the water? I am referring to the output line fromt he mixing valve. I think it's easier to turn on/off the water this way than to turn off the supply line. If you want to get fancy, you can even use one of those elctronic valve from a sprinkler system.

2. The PVC u-bend that you did. I would have make it with a T with one output going to the tank and the other one plum into your drain. Doing it this was will deal with issue #1 above. 2 Ball valves. One for fill the tank and one for directing water to the drain. Doing it this was, you can open it up to drain for say 20 seconds to the drain and then closing it and opening the the one to fill the tank.

Glad to hear that you are keeping your tank.

Van

DiscusOnly
07-10-2010, 11:53 AM
BTW. If you want to reducing some off-gassing when filling the tank, you may want rig a section of 2" pvc that the output from the mixing valve could go through. Inside the pvc, add a bunch of bioball so that it could float around as water travels through. If you need more clarification, I can send you sample sketch.

Moon
07-10-2010, 03:55 PM
I use a shower mixing unit for my system. You have to set the temp manually. Once set it works well. Cost about $15.

Yboat
07-10-2010, 05:12 PM
just a fyi, water temp will change as the hot water temp goes down.

cold water is pretty much always the same temp, once you exhaust the water from your above ground plumbing system.

rickztahone
07-11-2010, 01:51 AM
Van i would love to see that sketch. i have a whole bunch of tiny bubbles on the tank glass. also, i had to ditch the first set up since it did not provide enough pressure for the cold to keep up/match the hot water. i went and got another hose and made a T that feeds both h/c and then turns into one. worked like a charm. everything is set with cement though, will i still be able to due the de-gas thing? please advise, it would be much appreciated.

Oleg30
03-14-2011, 12:09 AM
Hi,

Will the temperature mixing valve work with drip system's low flow at >0.03 gpm ?

Thanks,
Oleg

Moon
03-14-2011, 09:04 PM
I have 25 tanks running on the system. So the flow rate will be higher than 0.03 gpm.

Oleg30
03-14-2011, 11:16 PM
I have 25 tanks running on the system. So the flow rate will be higher than 0.03 gpm.

most of those valves require at least 0.5 gpm, do you think you have this rate?

thanks

Moon
03-15-2011, 02:22 PM
most of those valves require at least 0.5 gpm, do you think you have this rate?

thanks
My system drips about 3 drops per second. So that will be 180 x 25 = 4500 drops. Not sure how to convert drops to gallons. The temperature does remain steady at 84 most of the time. It does drop when my wife uses the washer.

Oleg30
03-16-2011, 03:47 PM
thanks, looks like approx. >0.049 < 0.077 gpm, various calculators give different result. However this is way less than 0.5 gpm.
which model of the mixing valve do you use?

Moon
03-16-2011, 10:34 PM
I have a cheap Moen shower control valve.