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post #31 of 75 (permalink) Old 17-04-2016, 15:49 Thread Starter
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Not sure I'd want to fit my own though


Is he one of us, looks a bit of a nutter in the linked video, and his Mrs
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post #32 of 75 (permalink) Old 17-04-2016, 16:38
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Quote:
Originally Posted by BillCreer View Post
I find the biggest advantage of a SOG is that it allows the cassette to vent outside the van.

The biggest problem I observed in my van was the cassette, without a SOG, vented the gas that builds up, especially when travelling in hot weather, into the van.

The fact that it also pumps fumes outside, when the toilet is in use, is a bonus.

Another advantage is that because there is a constant airway to the outside of the van from the cassette, you never suffer from the built up air pressure "blowback" effect from the cassette up through the bowl which you can get if you open the "slice" when you've previously used the loo nearer to sea level and then have climbed to a much higher altitude............
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post #33 of 75 (permalink) Old 17-04-2016, 17:22 Thread Starter
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Originally Posted by TheNomad View Post
Another advantage is that because there is a constant airway to the outside of the van from the cassette, you never suffer from the built up air pressure "blowback" effect from the cassette up through the bowl which you can get if you open the "slice" when you've previously used the loo nearer to sea level and then have climbed to a much higher altitude............
I've never had a slide which sealed that well, I've just put a new disk, sliding cover and round seal as I wanted to leave it upside down over night to give the mech a good soaking, but it's peeing out of every orifice on the top, only the removable emptying cap being sealed.
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post #34 of 75 (permalink) Old 17-04-2016, 17:49
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Too much detail

My lovely one

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post #35 of 75 (permalink) Old 18-04-2016, 14:47
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The video shows that he already has an externally vented cassette - like ours.

At 8 minutes into the video you will see where the original vent on the cassette mated up with the rubber-lipped opening in the mechanism.

That is then connected into that vertical black ribbed tube to the right.

That tube vents out under the MH.

I have put the fan unit in that line!

Originally it was the SOG fan but when that packed up I used a computer fan.

A bit tricky to fit as there isn't mushroom.

So, no need to fit that green bung into the cassette, no need to put the cap on it every time it needs emptying!

No need to cut a big hole in the door, no flexi pipe in the way.

I just wish I could find an axial fan as small and powerful as the SOG one.
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post #36 of 75 (permalink) Old 18-04-2016, 15:35
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I'm pleased to see most of the replies on here are in favour of a SOG as I'm having one fitted in a couple of weeks - it's a type D unit in mine and not quite as simple a fit so Dave at Outdoor Bits will it for me.

Why have one? I'd like to do a lot more wild camping and the idea of dig a hole and bury it without chemicals appeals to me if I get stuck for a dump point. Also I've heard of sites that don't allow chemicals into their bio-septic tank system and so if I use them I won't kill their good system.

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post #37 of 75 (permalink) Old 18-04-2016, 20:42
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Quote:
Originally Posted by TheNomad View Post
Another advantage is that because there is a constant airway to the outside of the van from the cassette, you never suffer from the built up air pressure "blowback" effect from the cassette up through the bowl which you can get if you open the "slice" when you've previously used the loo nearer to sea level and then have climbed to a much higher altitude............
Does the standard automatic vent not prevent this? or does it work in the wrong direction?
I suspect it does work in the wrong direction because, if I remember correctly, you push against the spring into the tank. What's the point of venting to only stop negative pressure inside the cassette.

Cheers
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post #38 of 75 (permalink) Old 18-04-2016, 23:38
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Er, no. The vent is normally open until the "contents" get high enough to push the float up and close it.
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post #39 of 75 (permalink) Old 19-04-2016, 07:21 Thread Starter
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post #40 of 75 (permalink) Old 19-04-2016, 11:06
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Quote:
Originally Posted by BillCreer View Post
Does the standard automatic vent not prevent this? or does it work in the wrong direction?
I suspect it does work in the wrong direction because, if I remember correctly, you push against the spring into the tank. What's the point of venting to only stop negative pressure inside the cassette.
I was basing what I said on looking at a new spare one that I have. On the one I have the only way to make it open is to push the spring loaded T bar, in the middle, down. Should that T bar stay down? Maybe the one I have is broken.

Cheers
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