Air Conditioner Metering Devices Simplified. TXV VS PISTON. Which is better?

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⚠️ Disclaimer:
This video is for educational purposes. Any and all HVAC repair work is done at your own risk. Any person attempting to deal with any type of refrigerant MUST have their EPA 608 certificate. The DIY HVAC Guy channel is not responsible for any possible damages or injuries caused by the use or misuse of the provided information.

[ranger]

i am glad i went with simple system it has run trouble free for 23 years

[davidmaz]

I Very Much Appreciate Your Detailed Explanation Re: TXV Vs Piston. I am Installing a New Goodman and Was Not Certain if You Need Both the Piston And the TXV. Your Explanation makes Clear it is One Or the Other. Thank You for the Time

[werquantum]

Always straightforward and simple explanations. Thank you.

[hitekrednek]

Thank you sir for the explanation of these two metering devices. I know for me these are uncharted territory. I know they both exist and that piston has been around for a while but don't fully understand how they work. Your hard and fast explanation helped me and am looking forward to next vid! Thanks!

[acmm]

Great description and comparison of benefits vs reliability with long term operation

[FernandoPerez-yywl]

U hit the nail in the coffin on this.

[bluesteel]

Hi Dave. Excellent video. Question: Are capillary tubes ever used in residential split systems as the metering device or are they mostly for smaller appliance devices like window units, refrigerators and freezers. Thank You.

[MattJonesYT]

Also, even if the answer to the question about doing it without brazing is "no" it is still a good snippet to capture and explain why not. The existing competition for that snippet is just links to product manufactures so those are much more biased results. The search engines would prefer to get results for those search terms from more independent sources which means it's a snippet you can rank for even with a new site.

[christopherhaak]

This isn't the best description. A txv allows for a fixed subcooling regardless of conditions. This is extremely important if you have to deal with variable humidity levels. It's more efficient as noted in all conditions. With a properly installed system, a TXV is very reliable and they cost $60-100, they are cheap. With new efficiency standards they will effectively be required. The reason they don't get installed is that techs don't understand them.

[dukati]

Thanks again, Brother 🙏🏻 God bless you

[markmohebi]

What about if txv and piston are both installed in the same unit???
Please answer

[ronie]

Hi Dave, correct me if i'm wrong.
Most (99.9) TXV's are Hard Shut Off TXV's. If using a scroll compressor you're ok. However, if used with a reciprocating compressors you must install a Hard Start Kit at the condenser.

[skipper]

Awesome video all the time. I have a question R22 condenser transitioning to 410a. same r22 evaporator do i need to install txv or piston is okay.

[mel]

How do I adjust my valve to make my air colder? That’s what I need to know. It gets hot here in Florida. I was also told I could convert my old Freon unit to the new Freon and save money.

[tysonrojas]

There are two different types of expansion valves adjustable, non adjustable u can adjust your swing on your expansion valve if u add a pressure port at exapnsion valve so adjustables are more for energy efficiency to meet certain seer ratings in my honest opinion id just use an orfice it get as cold as its going to get with and expansion valve if not colder 100 percent of time , with a well insulatated home the compressor run time will be less and last longer than with expansion systems plus one lesss part that can go bad 😅 this is from my experience being the the industry for 12 years plus in so cal i do industrial refrigeration and air conditioning i started my first 7 as a residential ac tech and ran a service department so i encountered all types of issues and complaints ❤❤❤❤❤😢

[timwilliams]

How much more energy efficient are TXV's over pistons? Are we talking a few dollars a month or tens of dollars per month?

[arnaldoriveraarchery]

Hi I'm replacing my A/C unit I have a 2 ton the one I'm trying to get is a 3 ton the high line for the 2 ton is 3/4 the 3 ton is 7/8
Can I use an adapter ore I have to replace the all the copper lines

[nrdstrength]

Thanks for the video. We get bi annual checkups on our now 5 year old system. Local HVAC company recommends an upgrade and wants to charge me $2, 000 to go from a piston to the TXV which seems ludacris to me. Any thoughts?

[moxysoft]

How do you test a TXV? I had a pro come out and said nothing was getting through and wanted to replace my entire system!! I know TXV's can be expensive but can't I just put in the that valve and bypass the TXV? Thanks Really enjoy your channel 🙂

[robertcaparelli]

gotta use hard start with txv and that sometimes makes start up louder