Clear Sight Tube

[dutch101st]

I am looking for a source for a sight tube to put in line of my recirculation line...primarily on the "out" on my MLT valve

Any suggestions?

 

[gungadin]

If I understand your question, maybe just take a small section of silicone tubing with two hose barb connectors and stick it in-line?

 

[dutch101st]

More sophisticated than that.

 

[dutch101st]

Found em on McMaster...shoulda known!!

 

[JonW]

Can you post the McMaster part number?

 

[dutch101st]

Type 316 Stainless Steel
1/2" 2 7/8" 4 1/2" 3 1/2" __ 50 40° to 200° 4756K21 $260.49
3/4" 3 3/8" 5 1/8" 3 7/8" __ 50 40° to 200° 4756K22 281.71
1" 3 7/8" 5 5/8" 4 1/4" __ 50 40° to 200° 4756K23 311.99


http://www.mcmaster.com/#flow-sights/=9zo839

 

[Bobby_M]

Well, you can make one for much cheaper by putting a piece of polycarbonate tubing between two compression fittings.

 

[dutch101st]

I was thinking of that too, Bobby...

 

[JonW]

I thought that's what you were talking about.

What's the McMaster # for the polycarbonate tubing?

 

[Bobby_M]

9176T32 is 3/4" OD, 5/8" ID. You could use the 1/2" OD stuff also, but then you're down to 3/8" ID.

 

[dutch101st]

I will see about what I can come up with...if not, I can lay the cash out...I do fairly well

 

[tjferris]

I will see about what I can come up with...if not, I can lay the cash out...I do fairly well

Hey if you that well off, i'd be happy to let you finish funding MY build as well just thought i'd offer......

 

[barrooze]

Hey if you that well off, i'd be happy to let you finish funding MY build as well just thought i'd offer......

I hear that. I just need a 2 Stage Temp Control to be happy with my setup.

 

[Budzu]

9176T32 is 3/4" OD, 5/8" ID. You could use the 1/2" OD stuff also, but then you're down to 3/8" ID.

That's a great idea, even with these fairly expensive compression fittings (5182K815) its cheaper than buying a pre-assembled in-line sight glass.

 

[dutch101st]

Aw now if I don't let you fellas do this stuff on your own, you won't learn nothin'...

 

[klyph]

A Tri Clamp borosilicate glass sanitary sight glass is $66 bucks at St Pats. That would be hard to beat as even the buying two 3/4" swageloks would be at least half that.

 

[Ohio-Ed]

A Tri Clamp borosilicate glass sanitary sight glass is $66 bucks at St Pats. That would be hard to beat as even the buying two 3/4" swageloks would be at least half that.

I had a section of 1/2" polycarbonate in a hose similar to Bobby's suggestion.
I'm re-doing the plumbing and looking real seriously at the ones from St Pats.

The OP will still need two clamps and two Tri-clove to barb (or other) connectors, so the total price goes up a bit from $66.

Ed

 

[Red Clay]

Those SS compression fittings are pretty steep and aren't far from the St. Pats option.

Since we are using a plastic (polycarbonate) sight glass, why wouldn't we use the polypropylene compression fitting on it instead of stainless?

They are rated to 215F and cost $2.62 each instead of $26.91.

I'm all for SS bling, but I think I can overlook it in this case!

EDIT: I've ordered the set up and will report how it goes.

 

[Bobby_M]

You can sometimes snag compression fittings for a few bucks on Ebay. No reason to buy them retail from Mcmaster.com

 

[kegtoe]

You can sometimes snag compression fittings for a few bucks on Ebay. No reason to buy them retail from Mcmaster.com

any reason you wouldn't build these and sell em bobby? im n line to buy a few things from you once i get my new sculpture done laster this winter