DS4 wierdness

Gareth Burrows · June 28th, 2006, 03:19 PM

Whats this about. On a DS4, the clear rubber diaghram is under pressure, pushing out, which seems wierd as the diagrham is obviously exposed to being punctured. When you switch the gas on, you can feel the pressure increase under it. IBut my other DS4 doesn't do this. One of the DS4s has been in the water, and one of them has not...advice please...

caverkevin · June 28th, 2006, 03:27 PM

Advice.....don't worry.

When you are underwater that rubber bit will be squished into the cap tight.

It is a sealed air chamber. One of the two regs just has a little more air in the chamber. It goes out when you turn the reg on because the diapharm under the plastic bit has expanded.

About the only thing that could go wrong with this is if the diapharm developed a leak. Then it would blow out the rubber bit you are talking about. You would have bubbles coming out and water inside the cap.

Cheers!!

Kevin

**jb2cool** · June 28th, 2006, 03:43 PM

I guess if you wanted to you could unscrew the enviroment sealing cap a bit, squish the air out and then do it up again.

I wouldn't really bother though.

JAG · June 28th, 2006, 04:38 PM

What have you done with the Mk16's?

wilbo · June 28th, 2006, 04:44 PM

Garf,

Mine are the same - one bloated and one not.. and despite having one 1st stage with a green wheel and one with a black one - I still dive them..

Something in my head tells me that I may have read (distant enough for you?) that when the pressure seal is bloated like that - it indicates an imminent service.. can't tell you why and is probably a half truth..

so please ignore me and there is nothing to see here. move along.

wilbo · June 28th, 2006, 04:46 PM

Quote: (Originally Posted by JAG)

What have you done with the Mk16's?

Jag - your avatar.. are those lily pads in the background? are you in your pond there?

Gareth Burrows · June 28th, 2006, 05:29 PM

Quote: (Originally Posted by JAG)

What have you done with the Mk16's?

using them on the stages, and the Mk2 I had on my AL80 is now my argon reg. I had a DS4 on the argon, which just seemed daft, so moved everything along 1 place.

JAG · June 28th, 2006, 05:56 PM

Quote: (Originally Posted by wilbo)

Jag - your avatar.. are those lily pads in the background? are you in your pond there?

:D
Nah, it's my brothers fishing lake, I was clearing some of the swims of the lily pads. It stank.

Devon Rob · June 28th, 2006, 09:27 PM

Quote: (Originally Posted by jb2cool)

I guess if you wanted to you could unscrew the enviroment sealing cap a bit, squish the air out and then do it up again.I wouldn't really bother though.

Attatch the DS4 to a cylinder, remove the outer ring (only if you have the correct tool). Turn on the gas. Retighten the ring and remove the 1st stage from the cylinder.Back to where it should be.
For peace of mind I would check the intermediate pressure.

Per · June 28th, 2006, 09:55 PM

Check this out

June 28th, 2006, 03:19 PM	#1 (permalink)
Gareth Burrows(Offline) Chimp 2 Join Date: Nov 2005 Location: Horsham, West Sussex Posts: 369	DS4 wierdness Whats this about. On a DS4, the clear rubber diaghram is under pressure, pushing out, which seems wierd as the diagrham is obviously exposed to being punctured. When you switch the gas on, you can feel the pressure increase under it. IBut my other DS4 doesn't do this. One of the DS4s has been in the water, and one of them has not...advice please... __________________ Garf Amusing and Clever Signature under construction.

June 28th, 2006, 03:43 PM	#3 (permalink)
jb2cool (Online) Padawan learner Join Date: Nov 2005 Location: Bracknell, Berkshire Posts: 804	I guess if you wanted to you could unscrew the enviroment sealing cap a bit, squish the air out and then do it up again. I wouldn't really bother though. __________________ http://jb2cool.bulldoghome.com

June 28th, 2006, 04:38 PM	#4 (permalink)
JAG(Offline) New Member Join Date: Nov 2005 Location: Essex Posts: 130	What have you done with the Mk16's? __________________ -.. .. ...- . / ... .- ..-. . / ... .... .. .--. -- .- - . ... www.narknark.co.uk

June 28th, 2006, 04:44 PM	#5 (permalink)
wilbo (Online) Chimp 4 Join Date: Nov 2005 Location: Swindon, UK Posts: 878	Garf, Mine are the same - one bloated and one not.. and despite having one 1st stage with a green wheel and one with a black one - I still dive them.. Something in my head tells me that I may have read (distant enough for you?) that when the pressure seal is bloated like that - it indicates an imminent service.. can't tell you why and is probably a half truth.. so please ignore me and there is nothing to see here. move along. __________________ Cheers! Wilbo DIR explorers: DIR Yorkshire Divers: YorkshireDivers One of the Foxturd chimps Last edited by wilbo; June 28th, 2006 at 04:48 PM.

June 28th, 2006, 04:46 PM	#6 (permalink)
wilbo (Online) Chimp 4 Join Date: Nov 2005 Location: Swindon, UK Posts: 878	Quote: (Originally Posted by JAG) What have you done with the Mk16's? Jag - your avatar.. are those lily pads in the background? are you in your pond there? __________________ Cheers! Wilbo DIR explorers: DIR Yorkshire Divers: YorkshireDivers One of the Foxturd chimps

June 28th, 2006, 03:27 PM	#2 (permalink)
caverkevin(Offline) Doing It Caverkevin Join Date: Nov 2005 Location: North Kackilackie Posts: 363	Advice.....don't worry. When you are underwater that rubber bit will be squished into the cap tight. It is a sealed air chamber. One of the two regs just has a little more air in the chamber. It goes out when you turn the reg on because the diapharm under the plastic bit has expanded. About the only thing that could go wrong with this is if the diapharm developed a leak. Then it would blow out the rubber bit you are talking about. You would have bubbles coming out and water inside the cap. Cheers!! Kevin

June 28th, 2006, 05:29 PM	#7 (permalink)
Gareth Burrows(Offline) Chimp 2 Join Date: Nov 2005 Location: Horsham, West Sussex Posts: 369	Quote: (Originally Posted by JAG) What have you done with the Mk16's? using them on the stages, and the Mk2 I had on my AL80 is now my argon reg. I had a DS4 on the argon, which just seemed daft, so moved everything along 1 place. __________________ Garf Amusing and Clever Signature under construction.

June 28th, 2006, 05:56 PM	#8 (permalink)
JAG(Offline) New Member Join Date: Nov 2005 Location: Essex Posts: 130	Quote: (Originally Posted by wilbo) Jag - your avatar.. are those lily pads in the background? are you in your pond there? :D Nah, it's my brothers fishing lake, I was clearing some of the swims of the lily pads. It stank. __________________ -.. .. ...- . / ... .- ..-. . / ... .... .. .--. -- .- - . ... www.narknark.co.uk

June 28th, 2006, 09:27 PM	#9 (permalink)
Devon Rob (Online) Can´t remember-member Pacman Champion! Join Date: Mar 2006 Location: Lyme Bay.Devon.UK formerly Hamburg, Ger. Posts: 317	Quote: (Originally Posted by jb2cool) I guess if you wanted to you could unscrew the enviroment sealing cap a bit, squish the air out and then do it up again.I wouldn't really bother though. Attatch the DS4 to a cylinder, remove the outer ring (only if you have the correct tool). Turn on the gas. Retighten the ring and remove the 1st stage from the cylinder.Back to where it should be. For peace of mind I would check the intermediate pressure. __________________ this mail was checked for viruses,worms & bad breath