Y valve vs H valve

[medic505]

CAREFUL! Isn't the M25 (i.e., Metric 25 x 0.75) thread different from the 3/4" NPSM thread we see here in the USA on LP cylinders?

rx7diver

GOOD INFO!


Thanks

 

[BoltSnap]

CAREFUL! Isn't the M25 (i.e., Metric 25 x 0.75) thread different from the 3/4" NPSM thread we see here in the USA on LP cylinders?

rx7diver

It will work for 8 - 10 fills and then BOOOM, a rocket like projectile that can kill and would go through a car's door

 

[rx7diver]

This would be the first time I have ever seen a Y-Valve.

@Ulfhedinn ,

First pic is a relatively recent pic (12/27/2020) showing one of my Y-valves mounted on a LP OMS/Faber 121/125. (Pic shows a broken valve knob.)

Second and third pics are old pics (08/29/2010) showing my other Y-valve mounted on an old-school PST 72, with two Scubapro Mk 10 Plus 1st stages attached. This configuration is one of my favorites for the type of diving I typically do these days. Note: Primary 2nd stage is a Scubapro D400, and backup is a Scubapro G250.

rx7diver

 

[Ulfhedinn]

View attachment 678114 View attachment 678116 View attachment 678118

@Ulfhedinn ,

First pic is a relatively recent pic (12/27/2020) showing one of my Y-valves mounted on a LP OMS/Faber 121/125. (Pic shows a broken valve knob.)

Second and third pics are old pics (08/29/2010) showing my other Y-valve mounted on an old-school PST 72, with two Scubapro Mk 10 Plus 1st stages attached. This configuration is one of my favorites for the type of diving I typically do these days. Note: Primary 2nd stage is a Scubapro D400, and backup is a Scubapro G250.

rx7diver

Very cool! Thanks! To bad they don't make those in DIN. Would be fun to use on a 72 I have.

 

[DAJ]

Here are the type that I use and I run them in DIN. They are no longer made and difficult to find.

On a side note, the metric sized valves won't even make it to one fill. We had one on a cylinder that made it about half way to full before the valve was launched up through the ceiling tiles of the dive shop. I still have two Beuchat Y valves that are metric but I just hang on to them for parts if needed.

 

[DAJ]

Double post

 

[medic505]

Double post

Is there enough room on them to mount two first stages easily?

Can you get them in imperial thread sizes?

 

[Ulfhedinn]

Here are the type that I use and I run them in DIN

On a side note, the metric sized valves won't even make it to one fill. We had one on a cylinder that made it about half way to full before the valve was launched up through the ceiling tiles of the dive shop. I still have two Beuchat Y valves that are metric but I just hang on to them for parts if needed.

oh they do have DIN.. Thanks @DAJ .

 

[Ulfhedinn]

Bugged...

 

[Ulfhedinn]

Bugged...