Mushroom Valve replacement

jkaterenchuk · 13th January 2008, 09:53

I am wondering if anyone has replaced the standard Kiss Classic mushroom valve and nut/bolt assembly with a mushroom valve with the standard molded nipple. I have a few mushroom valves with the nipples (not sure of the source) and I tried to install it and it seems to fit good, the molded nipple seems to hold the valve secure in the housing and there does not seem to be any flow or sealing problems.

Is anyone else using a replacement like this? If so what is the source for the valves? Any issue that I might want to consider before making this change? I have attached a couple of pictures but the focus is not very good.

John

jkaterenchuk · 19th January 2008, 02:05

I am surprized no one had done this before....and no comments???

**SeaBass** · 19th January 2008, 05:46

I actually considered moving the other direction with my Ray Hoses.

They have the molded nipple and tend to warp. That causes them to make a vibrating sound. Even under water. (Anyone else experience this?)

The other day I had the hoses off the DSV and was holding my hand over the ends and discovered that the vibrating sound was actually the valve not working!!!!

Evidently the valve being warped was causing it not to shut completely and the vibrating was the valve allowing exhaled breath to come back through the valve.

As a result I considered changing to the nut & bolt (screw and nut) and a latex flapper. I figure that the latex will not warp and they are easily replaceable by cutting a new piece out of a latex glove.

Thom

**Dave1w** · 19th January 2008, 08:22

My Ray DSV does that as well. I think i'll take a look at it

Dave

**Robert Landreth** · 19th January 2008, 10:47

Quote: (Originally Posted by SeaBass)

As a result I considered changing to the nut & bolt (screw and nut) and a latex flapper. I figure that the latex will not warp and they are easily replaceable by cutting a new piece out of a latex glove.
Thom

Be very careful changing out to a check valve not designed for that particular DSV,

A check valve malfunction can be fatal!!! I strongly recommend not to use the latex from a glove, We have all seen how fast latex gloves rots, and how a glove that looks fine falls apart when you pull it on your hand. If you are going try to make your own valve then at least use silicon sheet material.

Check valves must function correctly and crack at the right pressure, this is determined by the section of the valve. If section is to thick it wont crack at low pressure making your work of breathing go out the window

. consequently CO2 build up.

To thin and check valve will get sucked back in through the windows in the check valve holder, and most likely get stuck there. The section of the check valve is determend by how the holder was designed, and obviusly how good the engeneer was.

**SeaBass** · 19th January 2008, 15:31

Quote: (Originally Posted by Robert Landreth)

Be very careful changing out to a check valve not designed for that particular DSV,

A check valve malfunction can be fatal!!! I strongly recommend not to use the latex from a glove, We have all seen how fast latex gloves rots, and how a glove that looks fine falls apart when you pull it on your hand. If you are going try to make your own valve then at least use silicon sheet material.

Check valves must function correctly and crack at the right pressure, this is determined by the section of the valve. If section is to thick it wont crack at low pressure making your work of breathing go out the window

. consequently CO2 build up.

To thin and check valve will get sucked back in through the windows in the check valve holder, and most likely get stuck there. The section of the check valve is determend by how the holder was designed, and obviusly how good the engeneer was.

Robert,

The latex dishwashing glove idea is actually one used by the Pelagian DCCR.

Points on care well taken though. Especially with the Ray DSV since it is zip-tied to the hoses and would be difficult to check on a regular basis.

I am sure there are several rEvo owners out there who are experiencing the same thing.

Thom

**Robert Landreth** · 19th January 2008, 15:58

Hey Thon, as long as you don't use Betadine to disinfect I guess it could work.
Betadine rots latex and natural rubber real fast

I prefer Vircon as it is much friendlier on the rubber components in a Rebreather.
good luck.
Robert

paulraymaekers · 19th January 2008, 16:27

Quote: (Originally Posted by SeaBass)

Robert,

The latex dishwashing glove idea is actually one used by the Pelagian DCCR.

Points on care well taken though. Especially with the Ray DSV since it is zip-tied to the hoses and would be difficult to check on a regular basis.

I am sure there are several rEvo owners out there who are experiencing the same thing.

Thom

that's why we teach people how to check the valves correctly before the dive, without cutting the zips, and it's also described in the manual

and the valves are silicon or nbr

paul

markmckee · 19th January 2008, 17:02

The mushroom valves are available from a company called Helios which is the UK.Hope this is some use to you. Cheers Mark Mckee

**SeaBass** · 19th January 2008, 23:35

Quote: (Originally Posted by paulraymaekers)

that's why we teach people how to check the valves correctly before the dive, without cutting the zips, and it's also described in the manual.

Thanks Paul.

I looked at the rEvo manual and found where it has the mushroom valve test in the pre-dive check.

************************************************** **
5.2: Predive:

* Check the correct funtioning of the mushroom valves within the breathing-hose assembly: open the mouthpiece, use the palm of your hand to block the exhale side (block the opening of the red connector) and breathe into the mouthpiece: no gas should leave your mouth. Now use the palm of your hand to block the inhale side (black connector) and suck: no gas should enter your mouth. Now close the mouthpiece, block the exhale side with your hand and blow intot the inhale side (black connector): no gas should escape from the mouthpiece. Block the inhale side and suck at the exhale side (red connector): not gas should enter the mouthpiece.

************************************************** **

This is a good test. The problem is that this test will not detect a warped/puckerd valve.

The valve does not leak when your hand is over the end of the exhale hose. It leaks when there is little resistance on the exhale side.

I purchased a brand new DSV & hoses from Water Safety and the brand new DSV made the noise the first time I tested it. Sometimes it doesn't make the noise when completely assembled to the rebreather and sometimes it even makes the noise while diving.

If you want to know why this is serious just breathe through your DSV while it is not hooked up to your rig. If it makes the vibrating noise keep breathing and it will just be a matter of time before you start getting symptoms of Hypercapnia.

Thom

19th January 2008, 02:05	#2 (permalink)
jkaterenchuk . Current Rebreather/s: Inspiration Classic Megalodon Classic Kiss Other Rebreather/s: Join Date: May 2006 Location: Lititz, PA Posts: 750	Re: Mushroom Valve replacement I am surprized no one had done this before....and no comments???
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19th January 2008, 05:46	#3 (permalink)
SeaBass Respect the Classics! Current Rebreather/s: Megalodon Ray Home Build Other Rebreather/s: Not Bought Yet Ray Home Build Join Date: Jul 2006 Location: San Clemente, CA Posts: 220	Re: Mushroom Valve replacement I actually considered moving the other direction with my Ray Hoses. They have the molded nipple and tend to warp. That causes them to make a vibrating sound. Even under water. (Anyone else experience this?) The other day I had the hoses off the DSV and was holding my hand over the ends and discovered that the vibrating sound was actually the valve not working!!!! Evidently the valve being warped was causing it not to shut completely and the vibrating was the valve allowing exhaled breath to come back through the valve. As a result I considered changing to the nut & bolt (screw and nut) and a latex flapper. I figure that the latex will not warp and they are easily replaceable by cutting a new piece out of a latex glove. Thom
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19th January 2008, 08:22	#4 (permalink)
Dave1w Born Again Diver! Current Rebreather/s: Sport Kiss Dolphin Ray Home Build Other Rebreather/s: Classic Kiss Dolphin Ray Home Build Join Date: Jan 2005 Location: Singapore / UK Posts: 340	Re: Mushroom Valve replacement My Ray DSV does that as well. I think i'll take a look at it Dave __________________ This message may contain spelling mistakes as it was generated by an idiot.
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19th January 2008, 10:47	#5 (permalink)
Robert Landreth Supporting Member Current Rebreather/s: Prism Topaz Other CCR Home Build Other Rebreather/s: Other CCR Home Build Join Date: Jun 2005 Location: CA USA/ Spain Posts: 38	Re: Mushroom Valve replacement Quote: (Originally Posted by SeaBass) As a result I considered changing to the nut & bolt (screw and nut) and a latex flapper. I figure that the latex will not warp and they are easily replaceable by cutting a new piece out of a latex glove. Thom Be very careful changing out to a check valve not designed for that particular DSV, A check valve malfunction can be fatal!!! I strongly recommend not to use the latex from a glove, We have all seen how fast latex gloves rots, and how a glove that looks fine falls apart when you pull it on your hand. If you are going try to make your own valve then at least use silicon sheet material. Check valves must function correctly and crack at the right pressure, this is determined by the section of the valve. If section is to thick it wont crack at low pressure making your work of breathing go out the window. consequently CO2 build up. To thin and check valve will get sucked back in through the windows in the check valve holder, and most likely get stuck there. The section of the check valve is determend by how the holder was designed, and obviusly how good the engeneer was. __________________ If it is broke don't fixit, Bailout!
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19th January 2008, 15:31	#6 (permalink)
SeaBass Respect the Classics! Current Rebreather/s: Megalodon Ray Home Build Other Rebreather/s: Not Bought Yet Ray Home Build Join Date: Jul 2006 Location: San Clemente, CA Posts: 220	Re: Mushroom Valve replacement Quote: (Originally Posted by Robert Landreth) Be very careful changing out to a check valve not designed for that particular DSV, A check valve malfunction can be fatal!!! I strongly recommend not to use the latex from a glove, We have all seen how fast latex gloves rots, and how a glove that looks fine falls apart when you pull it on your hand. If you are going try to make your own valve then at least use silicon sheet material. Check valves must function correctly and crack at the right pressure, this is determined by the section of the valve. If section is to thick it wont crack at low pressure making your work of breathing go out the window. consequently CO2 build up. To thin and check valve will get sucked back in through the windows in the check valve holder, and most likely get stuck there. The section of the check valve is determend by how the holder was designed, and obviusly how good the engeneer was. Robert, The latex dishwashing glove idea is actually one used by the Pelagian DCCR. Points on care well taken though. Especially with the Ray DSV since it is zip-tied to the hoses and would be difficult to check on a regular basis. I am sure there are several rEvo owners out there who are experiencing the same thing. Thom
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19th January 2008, 15:58	#7 (permalink)
Robert Landreth Supporting Member Current Rebreather/s: Prism Topaz Other CCR Home Build Other Rebreather/s: Other CCR Home Build Join Date: Jun 2005 Location: CA USA/ Spain Posts: 38	Re: Mushroom Valve replacement Hey Thon, as long as you don't use Betadine to disinfect I guess it could work. Betadine rots latex and natural rubber real fast I prefer Vircon as it is much friendlier on the rubber components in a Rebreather. good luck. Robert __________________ If it is broke don't fixit, Bailout!
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19th January 2008, 16:27	#8 (permalink)
paulraymaekers rEvo's daddy Current Rebreather/s: rEvo Other CCR Home Build Other Rebreather/s: rEvo Other CCR Home Build Join Date: May 2005 Location: belgium Posts: 1,441	Re: Mushroom Valve replacement Quote: (Originally Posted by SeaBass) Robert, The latex dishwashing glove idea is actually one used by the Pelagian DCCR. Points on care well taken though. Especially with the Ray DSV since it is zip-tied to the hoses and would be difficult to check on a regular basis. I am sure there are several rEvo owners out there who are experiencing the same thing. Thom that's why we teach people how to check the valves correctly before the dive, without cutting the zips, and it's also described in the manual and the valves are silicon or nbr paul __________________ www.rEvo-rebreathers.com .... the earth is flat, Elvis is alive, and radial scrubbers give longer dwell time than axials... Last edited by paulraymaekers : 19th January 2008 at 16:31.
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19th January 2008, 17:02	#9 (permalink)
markmckee New Member Current Rebreather/s: Classic Kiss Other Rebreather/s: Join Date: Feb 2006 Location: ireland Posts: 3	Re: Mushroom Valve replacement The mushroom valves are available from a company called Helios which is the UK.Hope this is some use to you. Cheers Mark Mckee
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