How To Easily Fix A Leaking Exhaust Valve On A Drysuit (3 Easy Options)


How To Easily Fix A Leaking Exhaust Valve On A Drysuit large
Bare Si Tech Dump Valve – Image courtesy of Scuba Store

How you fix your drysuit dump valve

A drysuit should be dry, right? Yes it should, but if you end up with a leaking exhaust valve you may get wet. So how do you fix a leaking exhaust valve (dump valve) on a drysuit? Let’s take a look…

Drysuit exhaust valve leaking and how to easily fix it? You can sometimes easily fix a leaking drysuit exhaust valve by clicking the valve down by a couple of clicks. If this doesn’t work and the valve still leaks on your next dive, try taking it apart to flush it out with water in case there are any foreign objects like sand that are preventing the seal from closing.

The three ways to fix your leaking drysuit exhaust valve

There are actually three ways to fix your leaking exhaust valve on your drysuit. These are listed in order of ease, but also I suggest you try each one in turn before you try the next one. This is because the third option is expensive! Try each fix; then go diving in your drysuit and see if the leak has been fixed. If not, move on to the next fix…and so on.

  1. Simply click the valve down a couple of clicks to stop the leakage, whilst still allow effortless dumping.
  2. Unscrew the exhaust valve and flush it out with water.
  3. Replace the exhaust valve with a new non-leaking valve.

Let’s now take a look at each of the above fixes in more detail and consider any safely aspects of each tip.

1. Simply click the valve down a couple of clicks to stop the leakage

The easiest of all the above tips is to close the exhaust valve down by a couple of clicks. The best way to do this is to fully open the exhaust valve by turning it clockwise. Then click it two clicks anti-clockwise which will close it off a bit.

Be careful not to over tighten the exhaust valve as you still need it to release air on your ascent on your next dive. But see below about what happens if you close this too tightly and what to do about it.

This fix should work, especially if your suit is less than five years old. Unless you’ve somehow managed to get something inside the valve like sand. If you have sand or another foreign object in your exhaust valve (or dump valve), you need to consider the next fix below.

You can experiment with this on your next dive. Set the valve two clicks tighter and if it’s still leaking try oner more click. However, be careful not to close the valve off too much otherwise it won’t dump air like it should on your accent.

2. Unscrew the exhaust valve and flush it out with water

If the two clicks to tighten your exhaust valve doesn’t do the trick, you may need to take the valve apart. This is very easy to do. All you need to do is to unscrew the back of the valve which is inside the drysuit. You should be able to do this with your hands rather than needing a special tool.

Once you’ve taken the back off, you’ll be able to pull the valve itself out from the drysuit.

To clean the valve it needs to be taken apart

Then when you’ve done this, you’ll need to take the valve apart to be able to get to the rubber exhaust valve itself to clean it. Be careful when you take it apart not to break the dump valve assembly or else you’ll need to buy a new one. Also, you need to remember how it came apart as you need to be able to put it back together afterwards.

To make sure you remember how it came apart you may want to take a video of taking it apart or take pictures of each step on your phone. Each manufacturers exhaust valve will be slightly different, but essentially the way they work is the same. If you watch the video below, this will give you some great tips on how this is done.

Clean the exhaust flapper with a Q-tip

Once you’ve taken your dump valve apart and you’ve got to the best way to clean the exhaust flapper is to fist rinse it is water. Then after that use a Q-tip to clean the seat of the exhaust valve. The scrub the back of the valve flap too in order to make sure both surfaces are clean and free of any debris.

Now you can put the dump valve back together. Once you’ve put it back together, make sure the mechanism works okay before you put it back in your drysuit.

Clean the seat seat where the valve sits on the drysuit with silicone grease and a Q-tip

Now you’re ready to put it back into your drysuit. But before you do it’s best to clean the seat where the valve sits in the suit first. To clean this use silicone grease and a fresh clean Q-tip. There should be a groove in the rubber where the exhaust valve sits. Make sure to use the silicone grease in this groove and clean it out of any debris.

Then put more of the silicone grease around the sealing surface of the drysuit too. Then do the same on the valve itself and apply silicone grease on this too. Once both surfaces are clean, remove any excess silicone with a clean end of the Q-tip and replace the exhaust valve back into the suit. Make sure you align the valve is in the grove on the suit before you completely tighten the back-nut up.

I thought it a good idea to share a great video that demonstrates how an APEKS drysuit dump valve is taken out of a drysuit.

3. Replace the exhaust valve with a new non-leaking valve

If on inspecting the exhaust valve flapper or the seat of the valve you find it’s damaged in such a way to cause the leaking, you’ll need to replace the valve.

Also, if after cleaning the valve and putting back together and back in your suit, the valve is still leaking, you’ll also need to buy a new one.

To replace your old exhaust valve with a new valve requires you to remove the old valve first. This is the same as it tip two above. You unscrew the locking nut on the inside of the suit to remove the valve. Take the old exhaust valve out comletely.

Take the new valve from the box, but before inserting it into your drysuit, make sure to clean the seat where the valve sits. Use silicone grease and a Q-tip to clean this and then put some of the silicone grease around the surface of the drysuit where the valve sits.

Carefully place the new valve into the suit and put the locking cap on the back. Before fully tightening, make sure the valve is sitting in the groove on the outside of the drysuit.

How do you know your exhaust valve on your drysuit is leaking?

If you’ve never experienced getting wet in a drysuit, there’s always a first time. It’s not nice as the water is cold as it enters the suit. If the lake is really back your undergarments will get soaked. Plus you’ll start to feel cold on your dive.

If it’s the exhaust valve that’s leaking, you’ll feel the water coming into the suit around where the valve is. Which in most cases is on the top of the arm of the should. Most drysuits also have a cuff exhaust valve too. If it’s your cuff dump valve that is leaking, then you’re more likely to get a wet are instead.

If you feel water coming into your drysuit around your arm, by keeping your arm down below your shoulder height, the water should stay on your arm.

When this happens on your dive you can try tip one above and click the valve down by two clicks to see if the leaking stops.

What can cause your drysuit exhaust valve to leak?

There are a few things that can cause your drysuit exhaust valve to leak, which are as follows:

  • Debris like sand gets caught between the valve flapper and the seat of the valve. This will prevent a tight seal between the flapper and the valve seat, thereby letting water in.
  • The valve flapper gets damaged from the debris that caught between this and the valve seat. This damage will mean water can get under the valve flap as a tight seal is no longer possible
  • The valve flapper perishes as it gets old so that it not longer creates a tight seal.

What’s the best way to know if the leaking exhaust valve is fixed?

The best way to know if the leaking exhaust valve has been fixed is to go diving with your drysuit. You’ll soon know if the problem hasn’t been fixed, as you’ll get wet again! If you don’t want to waste a dive in the sea, you could try you suit out in a swimming pool first to see if it leaks before you go diving.

What happens if you close off an exhaust valve too tightly?

Be careful not to close off your exhaust valve too tightly, otherwise you’ll stop the valve from letting air out as you ascend from your dive. If the air is not able to escape from your suit as you ascend, you will end up doing a fast ascent, as you’ll not be able to dump the air to reduce your buoyancy.

A fast ascent can be dangerous and can lead to decompression sickness!

How much does a new exhaust valve cost for a drysuit?

If you end up having to replace your drysuit exhaust or dump valve this could end up costing between $60 to $100 depending on the make and manufacturer.

I hope you enjoyed this article about drysuit exhaust valve leaking

I’d love to hear from you. Tell us about your adventures of diving and snorkelling. Please use the comments section below. Please also share your photos. Either from your underwater cameras or videos from your waterproof go-pro’s!

If this article hasn’t answered all of your questions. If you have more questions either about snorkelling or scuba diving (or specifically about drysuit exhaust valve leaking), please comment below with your questions.

There will also be many more articles about scuba and scuba diving safety tips (and on snorkelling too) for you to read and learn about this fabulous sport.

Have fun and be safe!

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