V4TEC Mushrooms/neg test

colinicky · 25th March 2007, 14:11

This is not the normal neg test question

With the V4TEC stuck in mouth ,inhale side blocked & the OC hose feed blocked I can still suck air in from somewhere

Now is this just a querk of the V4TEC or is it just a mushroom valve problem ?

CharlieT · 25th March 2007, 14:35

Quote: (Originally Posted by colinicky)

This is not the normal neg test question

With the V4TEC stuck in mouth ,inhale side blocked & the OC hose feed blocked I can still suck air in from somewhere

Now is this just a querk of the V4TEC or is it just a mushroom valve problem ?

What does the vendor recommend

Charlie

**woody** · 25th March 2007, 15:13

I Had this problem with the V4 tec BOV and found that you had to ensure the mushroom valves were seated very well and that the hoses were tight. It helps to lubricate the external O ring. This helps to ensure the hoses are fully home. Make sure the mushroom valve area is spotless and clean and make sure they are fully located.

Hope this helps

R

Mike

colinicky · 25th March 2007, 15:17

Quote: (Originally Posted by CharlieT)

What does the vendor recommend

Charlie

I only found the problem today & unfortunately most Germans don't work on Sundays !

decoweenie · 25th March 2007, 16:27

Quote: (Originally Posted by colinicky)

...or is it just a mushroom valve problem ?

Easy enough to block the exhale side as well to test your theory about the mushroom valve...

Mine was OK when blocked like your initial method, so it must be specific to your particular BOV.

colinicky · 25th March 2007, 17:12

deleted due to missed the point !

steevke · 26th March 2007, 07:14

Quote: (Originally Posted by colinicky)

This is not the normal neg test question

With the V4TEC stuck in mouth ,inhale side blocked & the OC hose feed blocked I can still suck air in from somewhere

Now is this just a querk of the V4TEC or is it just a mushroom valve problem ?

See if the leak comes through the attached regulator (at least my polish BOV does that and the V4TEC is just a copy of that one).

steven

colinicky · 26th March 2007, 07:27

Quote: (Originally Posted by steevke)

See if the leak comes through the attached regulator (at least my polish BOV does that and the V4TEC is just a copy of that one).

steven

Well with Inhale /exhale & oc lp feed blocked & the BOV in ccr mode I can still suck enough air to breath !

so not looking good

decoweenie · 26th March 2007, 07:40

Most likely this mysterious will allow positive pressure leak as well, so why don't you block as mentioned, and stick the BOV u/w (i.e. sink) and blow out hard ?

colinicky · 26th March 2007, 07:42

Quote: (Originally Posted by decoweenie)

Most likely this mysterious will allow positive pressure leak as well, so why don't you block as mentioned, and stick the BOV u/w (i.e. sink) and blow out hard ?

Ermmm actually no it doesn't

25th March 2007, 14:11	#1 (permalink)
colinicky Custom Title Allowed! Current Rebreather/s: Inspiration Vision Other Rebreather/s: Inspiration Classic Join Date: Mar 2005 Location: uk Posts: 676	V4TEC Mushrooms/neg test This is not the normal neg test question With the V4TEC stuck in mouth ,inhale side blocked & the OC hose feed blocked I can still suck air in from somewhere Now is this just a querk of the V4TEC or is it just a mushroom valve problem ? __________________ Colin I trust my rebreather completely , I just don't trust the user onwards & downwards
(Offline)

25th March 2007, 14:35	#2 (permalink)
CharlieT Custom Title Allowed! Current Rebreather/s: Inspiration Vision Other Rebreather/s: Join Date: Nov 2005 Location: London Posts: 449	Re: V4TEC Mushrooms/neg test Quote: (Originally Posted by colinicky) This is not the normal neg test question With the V4TEC stuck in mouth ,inhale side blocked & the OC hose feed blocked I can still suck air in from somewhere Now is this just a querk of the V4TEC or is it just a mushroom valve problem ? What does the vendor recommend Charlie
(Offline)

25th March 2007, 15:13	#3 (permalink)
woody Mmmm Rubber!! Current Rebreather/s: Megalodon Other Rebreather/s: Inspiration Classic Megalodon Sport Kiss Join Date: May 2005 Location: Wiltshire UK Posts: 198	Re: V4TEC Mushrooms/neg test I Had this problem with the V4 tec BOV and found that you had to ensure the mushroom valves were seated very well and that the hoses were tight. It helps to lubricate the external O ring. This helps to ensure the hoses are fully home. Make sure the mushroom valve area is spotless and clean and make sure they are fully located. Hope this helps R Mike
(Offline)

25th March 2007, 15:17	#4 (permalink)
colinicky Custom Title Allowed! Current Rebreather/s: Inspiration Vision Other Rebreather/s: Inspiration Classic Join Date: Mar 2005 Location: uk Posts: 676	Re: V4TEC Mushrooms/neg test Quote: (Originally Posted by CharlieT) What does the vendor recommend Charlie I only found the problem today & unfortunately most Germans don't work on Sundays ! __________________ Colin I trust my rebreather completely , I just don't trust the user onwards & downwards
(Offline)

25th March 2007, 16:27	#5 (permalink)
decoweenie Crash Test Dummy Current Rebreather/s: Other CCR Other Rebreather/s: Other CCR Join Date: Feb 2005 Location: Cairo Posts: 5,510	Re: V4TEC Mushrooms/neg test Quote: (Originally Posted by colinicky) ...or is it just a mushroom valve problem ? Easy enough to block the exhale side as well to test your theory about the mushroom valve... Mine was OK when blocked like your initial method, so it must be specific to your particular BOV. __________________ "...after a while you get bored offering advice to a bull that like to keep butting the fence with its head rather than walking through the open gate..." - Rebreather World PM
(Offline)

25th March 2007, 17:12	#6 (permalink)
colinicky Custom Title Allowed! Current Rebreather/s: Inspiration Vision Other Rebreather/s: Inspiration Classic Join Date: Mar 2005 Location: uk Posts: 676	Re: V4TEC Mushrooms/neg test deleted due to missed the point ! __________________ Colin I trust my rebreather completely , I just don't trust the user onwards & downwards
(Offline)

26th March 2007, 07:14	#7 (permalink)
steevke Custom Title Allowed! Current Rebreather/s: Inspiration Vision Other Rebreather/s: Sport Kiss Join Date: Jul 2005 Location: Belgium Posts: 311	Re: V4TEC Mushrooms/neg test Quote: (Originally Posted by colinicky) This is not the normal neg test question With the V4TEC stuck in mouth ,inhale side blocked & the OC hose feed blocked I can still suck air in from somewhere Now is this just a querk of the V4TEC or is it just a mushroom valve problem ? See if the leak comes through the attached regulator (at least my polish BOV does that and the V4TEC is just a copy of that one). steven
(Offline)

26th March 2007, 07:27	#8 (permalink)
colinicky Custom Title Allowed! Current Rebreather/s: Inspiration Vision Other Rebreather/s: Inspiration Classic Join Date: Mar 2005 Location: uk Posts: 676	Re: V4TEC Mushrooms/neg test Quote: (Originally Posted by steevke) See if the leak comes through the attached regulator (at least my polish BOV does that and the V4TEC is just a copy of that one). steven Well with Inhale /exhale & oc lp feed blocked & the BOV in ccr mode I can still suck enough air to breath ! so not looking good __________________ Colin I trust my rebreather completely , I just don't trust the user onwards & downwards
(Offline)

26th March 2007, 07:40	#9 (permalink)
decoweenie Crash Test Dummy Current Rebreather/s: Other CCR Other Rebreather/s: Other CCR Join Date: Feb 2005 Location: Cairo Posts: 5,510	Re: V4TEC Mushrooms/neg test Most likely this mysterious will allow positive pressure leak as well, so why don't you block as mentioned, and stick the BOV u/w (i.e. sink) and blow out hard ? __________________ "...after a while you get bored offering advice to a bull that like to keep butting the fence with its head rather than walking through the open gate..." - Rebreather World PM
(Offline)

26th March 2007, 07:42	#10 (permalink)
colinicky Custom Title Allowed! Current Rebreather/s: Inspiration Vision Other Rebreather/s: Inspiration Classic Join Date: Mar 2005 Location: uk Posts: 676	Re: V4TEC Mushrooms/neg test Quote: (Originally Posted by decoweenie) Most likely this mysterious will allow positive pressure leak as well, so why don't you block as mentioned, and stick the BOV u/w (i.e. sink) and blow out hard ? Ermmm actually no it doesn't __________________ Colin I trust my rebreather completely , I just don't trust the user onwards & downwards
(Offline)

Thread Tools
Show Printable Version Email this Page
Display Modes
Linear Mode Switch to Hybrid Mode Switch to Threaded Mode