Using a Magnehelic Guage on Enviro Mini

[Enviro Mini Owner]

I bought a Dwyer Magnehelic Guage measuring 0 to 0.2inches of water today. The stove wants to see 0.12 on the high setting.The hole where you take the reading on the Mini is just under a very hot ash shelf and just above the equally hot door to the ash box. It is described in the Enviro manual as a 1/8" hole, I would venture that hole is 1/16th. Any suggestions as to what I connect to this tiny hole and how I connect a hose to this hole without it or me getting fried? Any help from the experts would be appreciated,

 

[smwilliamson]

I bought a Dwyer Magnehelic Guage measuring 0 to 0.2inches of water today. The stove wants to see 0.12 on the high setting.The hole where you take the reading on the Mini is just under a very hot ash shelf and just above the equally hot door to the ash box. It is described in the Enviro manual as a 1/8" hole, I would venture that hole is 1/16th. Any suggestions as to what I connect to this tiny hole and how I connect a hose to this hole without it or me getting fried? Any help from the experts would be appreciated,

Go to lowes, home depot or hardware store and buy a basic thermocouple with the copper tubing, cut the tubing and feed out the solid core and use the outer copper hose, fits in that hole perfectly

 

[Enviro Mini Owner]

Go to lowes, home depot or hardware store and buy a basic thermocouple with the copper tubing, cut the tubing and feed out the solid core and use the outer copper hose, fits in that hole perfectly

Thank you.

 

[Happy Hour]

Could you post up some pics and what you bought when you are complete? I'm looking to buy one for my stove too.

Maybe someone could make some and sell them here

 

[Enviro Mini Owner]

Could you post up some pics and what you bought when you are complete? I'm looking to buy one for my stove too.

Maybe someone could make some and sell them here

The process is exactly as smwilliamson says. And it is really easy. Buy the thermocouple.(see item.jpg attached). Forget about the accessories. What you want is the inner tube, so cut off both ends of the copper tube (#1) and then I used a wire stripper to remove a little of the outer copper tube (#2) so that I could grab it and pull it out. Throw the outer tube away and the inner tube is what you need. Just slip one end into the hole on the mini and the other end into the LOW input on the guage. Remember to block off the other low input on the guage. Ignore the highs.
I was really surprised by the results.

 

[smwilliamson]

The process is exactly as smwilliamson says. And it is really easy. Buy the thermocouple.(see item.jpg attached). Forget about the accessories. What you want is the inner tube, so cut off both ends of the copper tube (#1) and then I used a wire stripper to remove a little of the outer copper tube (#2) so that I could grab it and pull it out. Throw the outer tube away and the inner tube is what you need. Just slip one end into the hole on the mini and the other end into the LOW input on the guage. Remember to block off the other low input on the guage. Ignore the highs.
I was really surprised by the results.

The other low input of the gauge is actually the high...it's a differential gauge

 

[steveg_nh]

I know this thread is over a year old, but I just picked up the thermocouple to make my hose for my mag gauge. When you do this, how are you connecting the copper tube to the mag gauge port? And when you slip the copper hose in the measurement hole, how far in should it extend past the hole, and does it not need to be fully sealed in the hole? Could you post a pic of the completed mag setup?

Lastly, I'm a bit confused. The first post above by smwilliamson says to use the outer tube. But the post "enviro mini owner" says to throw out the outer tube, and use the inner. Thanks.

 

[Enviro Mini Owner]

I know this thread is over a year old, but I just picked up the thermocouple to make my hose for my mag gauge. When you do this, how are you connecting the copper tube to the mag gauge port? And when you slip the copper hose in the measurement hole, how far in should it extend past the hole, and does it not need to be fully sealed in the hole? Could you post a pic of the completed mag setup?

Lastly, I'm a bit confused. The first post above by smwilliamson says to use the outer tube. But the post "enviro mini owner" says to throw out the outer tube, and use the inner. Thanks.

I don't think it makes a difference how far you push the copper into the stove. I would not know how to seal it. Anyway I pull it out and use it when I want to check a setting but I have found what Enviro recommends maybe the most efficient but not the hottest.

 

[Mt Bob]

I think things are being confused by posts(buy a thermocouple,cut.discard etc.) you need a piece of tubing to fit your hose,and to fit your stove.Just remember tyou can always use a t fitting on the hose going into your low pressure switch(if it has one) to make the same checks.

 

[steveg_nh]

So sounds like the best approach is a piece of tube into the stove, connected to some tubing. When the installers did it, they just used all tubing, right into the check port, but since they didn't let the stove get that hot, tube melting wasn't an issue.

 

[Bill L]

I used 1/4 inch silicone air tubing, the same type of tubing for fish tank air lines. This fits on the barbed Dwyer fitting. I cut the other end nice and square, removed the screw from the fire box, and just hand pressed the cut end over the screw hole firmly. This was sufficient to get the reading. The stove outside is hot, but was not hot enough to melt the tubing.

 

[Bill L]

I have seen other people suggest an inflating needle, you could probably stuff this in the end of the 1/4 tubing as well

 

[steveg_nh]

Perfect, thanks. I read about the air needle too, and was surprised by that. I figured the hole would be too small to get good air flow. I like the idea of the fish tank line, off to the pet store. I will likely use a short piece of tubing for the hole part...