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"pro" (combination) tank valves

Discussion in 'Tanks, Valves & Bands' started by sandanbob, Jun 15, 2021.

  1. sandanbob

    sandanbob Contributor

    # of Dives: 100 - 199
    Location: United States

    I did a search, but didn't see anything on this topic. Of course, I might not have used the right search terms. If there's already a thread, please let me know.

    My question is- what sort of experiences have people had with the "pro" tank valves? I currently only have yoke style first stages, but would like the flexibility of being able to use DIN if needed, so I am considering getting two of them. I believe that I wouldn't be able to use the full capability of the DIN if I am not using high pressure (3400 psi?) Of course, at $65-$90 each, they aren't the cheapest "accessory", so I wanted to see what experiences others might have had with them.


  2. rhwestfall

    rhwestfall Woof! ScubaBoard Sponsor

    # of Dives: 200 - 499
    Location: "La Grande Ile"
    3442 in fine with yoke....
    dead dog likes this.
  3. CanadaDan

    CanadaDan DMC ScubaBoard Supporter

    # of Dives: 100 - 199
    Location: Winnipeg, MB Canada
    The valves are engraved as having 3442PSI Service pressure. Plug in or out it's not an issue. I've used them both ways.
    dead dog likes this.
  4. Tracy

    Tracy Tech Instructor / Captain ScubaBoard Supporter

    # of Dives: 1,000 - 2,499
    Location: Livonia, MI
    They are $39 each at DGX. They work great for whatever pressure you want to operate at.
    Bowers and rob.mwpropane like this.
  5. 2airishuman

    2airishuman Contributor

    # of Dives: 100 - 199
    Location: Greater Minnesota
    They're what I use. A few, mostly older, yoke regs won't fit them.

    Try to get inserts that all use the same hex wrench. There are several "standards."

    Dive Gear Express has generic ones for $39 and Thermo ones for $50. They often have B-stock Thermo ones in their bargain section for half off. Now is one of those times.
    Cdncoldwater and Bob DBF like this.
  6. sandanbob

    sandanbob Contributor

    # of Dives: 100 - 199
    Location: United States
    Thank you for the replies! 2airishuman- thank you for the B-stock Thermo valves information.
    2airishuman likes this.
  7. happy-diver

    happy-diver Skindiver Just feelin it

    # of Dives: 2,500 - 4,999
    Location: Same ocean as you!
    I use the LH valve for upside down pony and stage bottles mounted on my back and left
    and right for sidemount bottles as I like the slightly longer smooth nub for loop bungees

    They come in very nice boxes, just threw 10 away in the rubbish what a complete shame

    With the flat sides and shallow depth of these valves and having just tried a dozen ancient regs that all fit

    I wonder to which regs you refer
  8. tbone1004

    tbone1004 Technical Instructor ScubaBoard Supporter

    # of Dives: I'm a Fish!
    Location: Greenville, South Carolina, United States
    they're fine, don't worry about it. Only extra charge you MAY face is a VIP on the tanks if the valve gets swapped, so either do it at time of VIP or find a buddy with a transfill whip.

    DGX typically has Thermo's on sale for $25 that they've taken out of other tanks they're selling which is where we buy them.
    Thermo 3000 Valve, Surplus
    rob.mwpropane and rhwestfall like this.
  9. sandanbob

    sandanbob Contributor

    # of Dives: 100 - 199
    Location: United States
    I want to thank those who pointed me to DGX (2airishuman and tbone1004.) I ordered three of the Thermo's. That's why I figured asking my question here would be a good idea.
  10. rjack321

    rjack321 ScubaBoard Supporter ScubaBoard Supporter

    # of Dives: 1,000 - 2,499
    Location: Port Orchard, Washington State
    Personally I despise the Thermos - the stupid overpriced crush washer is just lame.

    The DGX branded ones with the oring sealed bonnet nut are the bees knees.
    nadwidny and rhwestfall like this.

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