Any thoughts on if a pressure gauge is necessary when using this item? Have seen other dive web sites with gauge attached for $159. I suppose I can use my gauge attached to my RAS pony, or main... any thoughts???? Thanks
It is better if you actually need the pressure immediately, but I found mine quite useful without one.
After I had mine for a while, I put one on, spending $20 for a gauge online and less than five for a street T at the local hydraulics shop. I DIY a lot, if you don't and have the money, get the gauge unit because it is more useful.
A pressure gauge isn't really necessary because if you are going to equalize two tanks you are "going to get what you get." Not to mention after they're equalized you are going to hook them back up to your SPG to go diving so at that point you will know the pressure. You can get a very rough idea of what the pressure may be by averaging the amount of air in the two tanks before you begin equalizing them.
I use this to keep my pony filled, occasionally to equalize tanks. Never had much of a need for a pressure gauge on them. I check my pressures after they have equalized with the gauges on my pony and main.
I dont know what you want to do with this. i use it to refill my pony from a full main tank. got a PGs on pony and main so it is what it is. i guess if you want to partial fill and periodical check it would help.
No pressure gauge needed as long as you are using it tank to tank and the tanks are equal pressure rating. Since it only equalizes the pressure between the two tanks, it will lower the pressure in the full tank, and raise the pressure in the empty one to a point less the starting pressure in the full tank. [Example: 3000 psi -> 0 psi. End result is 1500 psi in each tank.] When the air pressures are equal, the air will stop flowing. You would however, want a pressure gauge if you wanted to add a specific amount of air to the empty tank, or if you were filling from say a 5000 psi tank to a 3000 psi tank (I would not recommend using this tool if the full tank pressure exceeds the rating of the empty tank).
Thanks. My Pony is 13cu and is rated at 3000psi. Shouldn't be a problem despite size. There's also a bleed off valve that should make air exchange relatively safe and simple. Appreciate your feedback.
A gauge would be nice, but it's not worth the extra $75, IMO. It's pretty simple; if you're equalizing two tanks that are the same size, note the pressure of each before you take off the regulators. You're going to equalize to whatever pressure is halfway between the two, minus a couple hundred psi that you'll lose to the hose. If you're filling a 30CF tank off of a 90CF tank, you'll end up with both tanks at about 2/3 the starting pressure of the larger tank.
As long as you can check the tank pressures before and after the fill a pressure gauge on the yoke is not necessary.
Appreciate it. One less thing to haul around. Item looks promising. Thanks again.
Hi Chris, I would not be concerned without a gauge attached when filling a tank with equal or higher pressure rating than the donor tank. You can just use any available gauge to check the pressure after it is done equalizing. However, I would not use this without a gauge attached to fill a tank with a lower pressure rating than the donor tank (eg. Filling a LP steel from an aluminum). Hope that helps! Mike
Thanks for the info. The Pony is rated at 3000psi. Shouldn't be a problem. This item should come in handy for traveling.
Appreciate your reply.
I bought this to fill my very small tanks from the larger tanks that I own, I'm not interested in getting my pony bottle inspected every year, I just fill them my self.
We all do what we want, and what we feel is safe...You do
what you like, this hose is well made...easy to use
Jack , Florida Keys
Thanks John. I've been looking for awhile to find such an item. Most dive shops outside the US have an "off sight" location their tanks are picked up from so this should come in handy to bleed off the excess air in my tank after a dive to have on hand for deeper dives...Safety First.
we use to refill pony tanks (20-30) from full size (100s).
the equalizer reduces the pressue in the full size to an amount equal to the pony pressure. So 3000 in the 100, becomes about 2500 in both.
No gauge necessary. If you want to know the pressure in the pony, it will be the same as the full size.
have used this and similar shallow diving for Florida lobster in the Keys for years. works very well.
Only for convenience or if trying to get to a set pressure point. Check pressure on both tanks with a pressure gauge prior to attaching. Assuming both tanks are same size, final pressure will be midway between the two initial pressures.
We do sell one that comes with the pressure gauge built on. It is better to buy it pre done, rather than try to assemble one yourself if you have never done it before. Also the pressure gauge allows you to see exactly how much pressure you are putting into the tank so you don't accidentally overfill or underfill a tank.
I plan on filling a Pony tank (13cu) with the residual air I have left over from my main tank. My understanding that it equalizes the pressure so overfilling should not be a problem. The Catalina Pony is rated at 3000psi. Are you saying it is possible that the receiving tank (Pony) may be compromised? Could you please elaborate. It also has a bleed off valve, does this add to the safety of the equipment? The cost is less at Leisure Pro with gauge versus other dive web sites. Thanks for your response.