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Dive Slates

The underwater slates and notebooks shown here are a must have item for all scuba divers, allowing you communicate quickly and accurately or just make notes or maps. Easily cleaned off after the dive, a diver slate or note book should be with you on every dive.

Technical Tip

Divers have tried a lot of ways to clean their slate and/or wetnotes: kitchen cleansers like Ajax and Jif, as well as toothpaste and sandpaper. But they all pretty much make a mess and are not very handy either. The solution is Trident Erase-A-Slate. It looks like a small sponge, but it's not abrasive and it's not soapy. To remove your carbon/graphite pencil notes in a moment just wet it and wipe. We aren't talking elbow grease... just wipe. We don't know how it works, but it works great and there is no soapy residue so you can just throw them in your dive bag or dry box.

Pre-Season Checklist - Everything Else

Pre-Season Checklist - Everything Else

The winter is finally over and the new season is coming up fast. If you were sensible the winter period was the perfect time to have your kit serviced by a professional, but if you didn't, now is an opportune time to dust off your kit and give it a good going over to pick up any problems early, leaving enough time to get them sorted out.

Although nothing beats a proper service, these little guides will take you through some relatively simple but well advised kit health checks. Part 2, which you are reading now is for checking your BCD, Drysuit, and other important components. Part 1 is all about Checking your diving regulators.


Scuba Cylinder

Annual Cylinder Test

You're not going to be a happy camper if you head out for your first dive of the season, rock up to your dive shop for an air fill and find your dive cylinder is out of test. So, please check your cylinder is still in test, and if not then get it tested as soon as possible.

Scuba Doctor Service and Repairs is a fully accredited SAI Global Hydrostatic Cylinder Test Station complying with Australian standards AS2030 and AS2337. See Scuba Cylinder Testing

Cylinder Visual Inspection

It's always worthwhile doing your own external inspection of your dive cylinder(s) looking for damage that may include gouges, dents or corrosion. To carry out this inspection thoroughly, the cylinder boot and mesh are removed. Check for any signs of problems and if you find some get the cylinder looked at immediately at a licensed cylinder testing station.

If you have a tank handle, make sure it's secured properly. If you don't have one on your steel cylinder already, we recommend the Northern Diver Steel Cylinder Fixed Tank Handle.

If your protective cylinder mesh is looking the worse for wear, then replace it. Most of the cylinder mesh products around these days are very poor quality. The Trident Tank Mesh Protector we have is top quality.

See also, Scuba Cylinder Care and Scuba Cylinder Testing.

Inflator Hoses

With the state of the hose and port O-ring already checked during the regulator inspection all that's left is the quick disconnect (QD) coupling. A nice, clean and well cared for QD should simply slide on smoothly and click into place without slipping off if pulled. The release collar should also slide and spring back cleanly without feeling and sounding like it's got a bucket of sand stuck in it.

If it's a bit sticky try soaking it in warm soapy water to help dislodge any salt crystals and dirt that may have become attached to the metal surface. There are not many serviceable parts within your standard QD coupling so if the problem can not be resolved with a simple but thorough clean then unfortunately a replacement may be in order. Just remember to look after it this time!

Where a replacement is required, remember that there are more than one size and shape of connector, so be sure to get the correct length hose to suit the size of your drysuit/BC and also the correct coupling to match the manufacturers standard equipment.

Also remember that you usually get what you pay for. Significantly cheaper usually doesn't result in the same quality of product.

Need a new inflator hose? We have the full range of Miflex inflator hoses in a wide range of colours.

See also, Caring For Scuba Diving Hoses.

Buoyancy Compensator

Corrugated Hose

It's a rubber component so it will be subject to the abuse of salt water, chlorine and other corrosive substances during its life and will eventually perish. Be sure to check each ring, perishing and splits are easily seen by stretching and bending the hose. Also check that the cable ties at each end are tight and secure. The last thing you want to do is pull off the inflator or hose assembly. It kind of ruins the dive.

Inflator — inflate and deflate buttons

The inflate and deflate buttons generally don't require anything more than just an operational check over to make sure that they actually do what they are supposed to do. With the inflator hose connected and your regulator set pressurised, make sure that the BC inflates and deflates when the respective button is pressed.

Also be sure to check that the oral inflation works correctly. Blow into the mouthpiece whilst holding the deflate button down to manually inflate the BC, release the button to prevent the air coming back out.

With the system still pressurised and the hose connected to the BC dunk the inflator assembly in some water to check for any escaping air, particularly around the hose connection.

Dump Valves

BCs typically have four means of releasing air these days, a dump valve on your right shoulder, one on your left or right hip, usually one incorporated into the inflator shoulder assembly, and lets not forget that all important deflate button on the inflator assembly.

Make sure that the pull strings are not frayed, particularly where they enter the valve or pull handle which are chafe areas. The dump valves usually double up as a pressure release valve to prevent damage occurring from over inflation. Inflate the BC until the valves are forced open to release the excess air before sealing once maximum pressure has been restored. With the BC full of air test that each dump valve opens and seals correctly. Air hissing out indicate a dislodged or damaged seal.

Pressure Test

Now to check the integrity of the BC itself. With the BC fully inflated to maximum pressure disconnect the inflator hose and leave the BC for a few hours. If when you come back it is still nicely inflated there are no issues, however, if the BC has noticeably deflated some investigatory work will need to be done to locate the leak. The easiest place for this is in a pool with the aid of a willing assistant to run around all the seals and hunt down the hole or guilty valve.

see also, Buoyancy Compensator Care.


Drysuit Inflator

Basically the same test as the BC variant. Check that pressing the inflate button allows air in and letting go stops it.

If the button is a bit sticky, try spraying a small amount of silicone spray down between the button and the outer housing. Then repeatedly press the button to work the silicone into the O-rings and the shaft.

Drysuit Dump Valves

Some people prefer cuff dumps, others the auto shoulder variety. Whatever you favour, a dysfunctional dump valve could have very dire consequences so be sure to pay particular attention to your drysuit dump valve.

The simplest way to check either of the valve types is to create a seal over the inside of the valve with your mouth and blow to check that air can pass out of the valve and then suck to test that no water can penetrate into your dry suit.

Drysuit Zips

With the drysuit zip open, carefully inspect the teeth for any obvious damage and also frayed edges or threads that could allow even the smallest entry route for water.

Once completed, zip up the suit and check that all the teeth meet and that there are no visible gaps.

You should regularly (but not excessively) check and lubricate your zip to help maintain it and reduce wear.

Internal Seams

Thoroughly check all the internal seams that you can physically get to. Particularly look for damaged or peeling tape. If your suit is glued, be sure to check that each join is not starting to split. Any remedial repairs required are best undertaken whilst the suit is nice and dry.

Drysuit Seals

It's particularly important to check latex seals, which can quickly perish if mistreated and not looked after. Check the edges for tears and nicks that could rip when the you put your hand or head through the seal. Also gently stretch the seals looking for any perished areas.

To prevent the latex sticking to itself and speeding up the deterioration process make sure you lightly dust the inside and outside of the seal with plain, non-fragrance talcum powder before putting the suit into storage.

Drysuit Boots

Don't forget to look over your boots checking for gouges and splits in the sole and where your fins rub against them when in use. Boots are typically pretty heavy duty, so can take a fair bit of punishment before they'll need replacing.

Drysuit External Inspection

For this you're going to need some suitable bottles to stuff in the wrist seals. Something like a football to wedge in the neck seal and some soapy water.

Firstly, lay the suit out and give it a visual going over to spot any obvious nicks and gouges in the material.

Secondly, insert your bungs of choice into their respective seals, zip up the suit, close down the auto shoulder if fitted and inflate the suit. Sponge the soapy water over the suit. Any pin prick holes should much more readily show up with expanding bubbles.

See also, Drysuit Care and How to Effectively Maintain Your Drysuit.

Dive Accessories

Ok, so that's all the big pieces of kit checked but don't forget all the little accessories that we carry:


Mask and Fin straps have a great knack of snapping just at the wrong time. Be sure to check them over, stretch them to look for any tears or splits. For your own sake make sure you carry at least one spare strap of each type you use in your emergency spares box!


Computers have had battery condition indicators for years now, but don't forget that batteries are affected by temperature, so even though the indicator might say 50% whilst on the surface attached to your nice warm wrist, as it hits the water and cools down it could quite easily fail. Be safe, get it replaced (or do it yourself if it's user changeable) before the battery level gets too low.

See also, Dive Computer Care and Dive Computer Battery Change.


Items such as your torch shouldn't be over looked either. The O-ring that is preventing it from being flooded should be checked. Carefully remove the O-ring (don't use sharp implements as you could nick or cut the o-ring). Give the O-ring a wash in some warm soapy water and dry it. Inspect the O-ring for any damage, and finally apply and a sparing amount of silicone grease.

The groove in which the O-ring sits should also be cleaned out and dried for re-inserting the o-ring.

A Final Note

Finally, these steps should never replace proper servicing carried out by a trained and qualified service technician. Consider these steps a check that everything is in good working order and a means of spotting potential problems before they become an actual problem.

If you have any specific enquiry about how to care for your dive gear, please feel free to contact The Scuba Doctor by email to or by a telephone call to 03 5985 1700.


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