Any reson not to do it this way? (Pitot connections)

[mfleming]

Originally Posted by Freemasm

Sorry. Not meant to be a thread hijack......

But of course that?s exactly what happens when one diverts the conversation away from the OPs question.

I?m also interested if using push to connect fitting to aluminum tubing is acceptable.

[Handclutch]

I have a 90 degree push-on fitting on a Gretz heated pitot and it works fine. Passes the leak check with flying colours.

Jack

[Freemasm]

Originally Posted by Bavafa

If Garmin, you will need to run two sot or hard line, most people run soft lines. One is for your pitot tube and one for AOA. The AOA is not absolutely necessary but if using Garmin, then it would be a shame not to plumb that. I can hardly see a reason for a conduit, RV14 and many other models have small holes in the ribs for this usage.

Hope this helps.

Thank you, Sir. Another testament to the great folks here that kindly share their knowledge.

Originally Posted by mfleming

But of course that?s exactly what happens when one diverts the conversation away from the OPs question.

I?m also interested if using push to connect fitting to aluminum tubing is acceptable.

Of course, there are others

[maniago]

errrr......and why not a 3/16" to 1/4" brass compression fitting instead? 5 for $10.

https://www.amazon.com/gp/product/B0...G0CWMAWQ&psc=1

Then to Lowes for 1/4" plastic ferrules......

Just wondering.

[Boyd Birchler]

My 7 is 15 years old and worked fine with the push on fittings. I'm now changing to a heated pitot (placed further out in the wing)and using the same style push on fittings from Mac-Master Carr including the two 3/16th to 1/4" for adapting AOA and pito hard 3/16 to 1/4". I color coded the static,pitot and AOA lines buying the different colors plastic from Cleveland Tool, which seems to be better quality than the original.

[Reflex]

Originally Posted by maniago

errrr......and why not a 3/16" to 1/4" brass compression fitting instead? 5 for $10.

https://www.amazon.com/gp/product/B0...G0CWMAWQ&psc=1

Then to Lowes for 1/4" plastic ferrules......

Just wondering.

Great question and I certainly thought about going that way.

For me, the issue isn't price. Brass would be easy to find, inexpensive, and would likely perform adequately.

I'd like to use a push-to-connect (PTC) fitting for the following reasons:

• I want to be able to remove the pitot tube for inspection/repair
• My pitot is located a bay outside the bellcrank/inspection panel. A compression fitting requires two tools to tighten or loosen.
• One of my concerns in looking at installations that use heavier fittings is that the soft aluminum pitot tubes could work harden over time. Haven't heard anything about that, but it appears that any bending of the aluminum tubing away from center or vertical relies on the strength of the tubing to hold the fitting in place. The heavier fitting the greater the possibility of flex in the tubing.
• The push to connect is lighter
• Ease of installation
• Multiple companies use this type of fitting on static ports (Cleaveland, Dynon, Stienair)

[maniago]

Originally Posted by Reflex

Great question and I certainly thought about going that way.

For me, the issue isn't price. Brass would be easy to find, inexpensive, and would likely perform adequately.

I'd like to use a push-to-connect (PTC) fitting for the following reasons:

• I want to be able to remove the pitot tube for inspection/repair
• My pitot is located a bay outside the bellcrank/inspection panel. A compression fitting requires two tools to tighten or loosen.
• One of my concerns in looking at installations that use heavier fittings is that the soft aluminum pitot tubes could work harden over time. Haven't heard anything about that, but it appears that any bending of the aluminum tubing away from center or vertical relies on the strength of the tubing to hold the fitting in place. The heavier fitting the greater the possibility of flex in the tubing.
• The push to connect is lighter
• Ease of installation
• Multiple companies use this type of fitting on static ports (Cleaveland, Dynon, Stienair)

Sounds good to me. Thanks for explaining your rationale. As I sit here thinking about this connection (metal to plastic) and what youve said, it strikes me that I might just go and see if a simple piece of rubber vacuum hose will fit both. Add 2 small spring clamps and done. Just thinking....

[mturnerb]

Are the push-to-connect fittings designed to work with metal? Seems like any small scratches might compromise fit/airtightness.

[Plummit]

Originally Posted by mturnerb

Are the push-to-connect fittings designed to work with metal? Seems like any small scratches might compromise fit/airtightness.

John Guest developed the "push-to-connect" fittings in the '70's. they typically use an "O" ring with stainless teeth to grab the tube. Today Push fittings are made of both metal (typically brass), PVC, PEX and polypropylene. Small scratches usually aren't a problem with Guest-style fittings.

-Marc

[Greg Baron]

Stein has 2 solutions to connect the Garmin 3/16 in metal to the 1/4 in tubing. Either apush on adapter or combination od brass fittings.