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Hi all, I have been reading with interest some relatively conflicting/vague information about multiple sclerosis and diving. I suspect it is vague due to a weak evidence base to support any decision making, but I am interested to know if anyone is aware of any sources/information about the...

Hello all, While I am aware that there is reasonably strong evidence that lung bullae are a risk factor for barotrauma in scuba diving, and their presence is a contraindication (absolute?) to scuba diving, I have been unable to find any information about their risk, if any, in freediving...

Hello all, I have a PARAMINA MISTRAL 6 EM compressor that has a pre-installed PMV, allegedly set at 120 bar. However, I am interested in checking that it is indeed set at 120 bar. When I open the fill whip and start the compressor, air starts to flow after a few seconds but the pressure gauge at...

I have now serviced around 30-40 first stage regulators from Apeks (DS4, DST etc). The below relates to the regulator straight after I have serviced it (official parts, ultrasonic cleaner, etc). Some first stages seem to have a very clean lock-up at a particular IP, others will immediately go...

Hello, Does anyone have a reference/parts diagram that shows what O rings are used etc for the standard BTS manifold pictured?

Hello- do you rinse your E/O connectors in fresh water after use in the sea after each dive or is it best to leave them be?

Hello all, I have a transmitter for my back gas but not for my deco cylinder. During a gas-switching dive, does the Perdix account for the fact I have switched to a non-AI gas when calculating the average SAC for the dive? For instance, if you breathe at a steady 0.6 bar/minute, and do half the...

Ive got the Santi heated vest and thermovalve but would like your opinion on the battery. I'm currently considering: 1) Yellow diving 10ah battery 2) Santi 6ah battery I am slightly concerned the 6ah battery may not quite be sufficient for 60-90 minute dives (at least not two of them which I...

For those who have two separate battery canisters, one for a heating system and one for an umbilical torch, how do you store these in your DIR twinset rig? Are they both next to each other on the right waist harness so that the long hose loops round both together? Is there a better way?

I regularly service my Apeks DS4 first stage but now want to make sure it is O2 clean for use with 80% O2. Is the following sufficient for this? 1. BIOX ultrasonic cleaner fluid 5 Litre BIOX Ultrasonic Cleaner Fluid - For Breathing, Scuba Equipment and Brass Instruments Cleaning...

Is it ok to dive with a twin-set where only one first stage is used? (With the manifold open and the unused cylinder valve shut)? (effectively making the twinset a single larger cylinder with more failure points !) Reason for asking is that I only have two first stages and want to know if I...

Hi, I want to try fitting the SHOWA 720 gloves instead of the original latex gloves with my kubi system. Having just fitted them, because of the inner lining the seal isn't perfect and blowing air into them I can see bubbles forming around the wet glove. I am using the same O rings supplied with...

I decided to service my manifold and valves for the first time. Admittedly I very stupidly removed the manifold while one tank still had 50bar in. (I know..). Now for the question: can the rapid decompression or the associated cooling (50-1bar in around 5 seconds or so) have caused damage to the...

On a practice pool dive I was practising turning the tank valve off, the buddy signalling out of air, then turning the air back on. When I turned my buddy's air back on, there was a very large leak of air from the DIN connection on the first stage. This was uncomplicated as I gave my buddy my...