Red Alert - Toilet Thread - Refilling a SOG Filter

Lenny HB

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Oct 18, 2007
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On the coast in West Sussex
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658
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Hymer B678 Dynamic Line
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Since 2008 & many years tugging
With SOG filters costing €24 or £25 over here I thought I'd have a look at refilling one. Took longer to source the charcoal pellets than do the job.
£6 for 600 gm of active charcoal pellets enough for 2 refills.

Cut a 21mm hole with a hole cutter.

P1120284.JPG


Emptied out and refilled with fresh charcoal pellets.

P1120285.JPG


Cut a wine bottle cork in half to make a stopper, job done.

P1120286.JPG
 
Apr 11, 2015
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oh dear having visions of that cork shooting out in windy conditions.:Eeek:

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May 31, 2015
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For activated charcoal try aquatic shops next time Lenny, they are used in fillters for fish tanks and I’m guessing they will do the same thing..

Plenty of aquatic shops around and on line ...

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OP
Lenny HB

Lenny HB

LIFE MEMBER
Oct 18, 2007
32,467
61,806
On the coast in West Sussex
Funster No
658
MH
Hymer B678 Dynamic Line
Exp
Since 2008 & many years tugging
Make it neater..... Drill a 20mm hole and use a 20mm blind rubber grommet as used in electrical socket boxes.
Now you tell me.:)

It actually came down to what size hole cutters & what I had to fit them, the original idea was to use a rubber boat bung. No one can see it when fitted in the double floor.
 
Last edited:

Robert Clark

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Jul 12, 2014
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On my old van Lenny the SOG went through the roof and I don’t recall there being a filter.
On the new van there is no vent in the roof, so I’m guessing it goes through the floor.
Does that mean I’ve got a filter somewhere like yours?

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OP
Lenny HB

Lenny HB

LIFE MEMBER
Oct 18, 2007
32,467
61,806
On the coast in West Sussex
Funster No
658
MH
Hymer B678 Dynamic Line
Exp
Since 2008 & many years tugging
On my old van Lenny the SOG went through the roof and I don’t recall there being a filter.
On the new van there is no vent in the roof, so I’m guessing it goes through the floor.
Does that mean I’ve got a filter somewhere like yours?
Roof vented no filter, if it's through the floor yes it's the green canister filter.
That's if you have a SOG, you may just have the Thetford vent where the filter is under the cassette.
We ordered the SOG then found it came with the Thetford one anyway.
 
Jul 5, 2013
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Tunbridge Wells
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On my old van Lenny the SOG went through the roof and I don’t recall there being a filter.
On the new van there is no vent in the roof, so I’m guessing it goes through the floor.
Does that mean I’ve got a filter somewhere like yours?
Robert, you may have the Thetford equivalent which always vents through the floor. If it comes on with the first press of the flush button it is the Thetford one. In that case the filter is in a compartment under the cassette.
 

Riverbankannie

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Mar 11, 2016
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My filter is on the cassette door and is flat and rectangular like this
3AD23D67-9B8A-4009-A57D-3BF7F8ECDA5F.jpeg

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OP
Lenny HB

Lenny HB

LIFE MEMBER
Oct 18, 2007
32,467
61,806
On the coast in West Sussex
Funster No
658
MH
Hymer B678 Dynamic Line
Exp
Since 2008 & many years tugging
My filter is on the cassette door and is flat and rectangular like this
View attachment 217390

likewise..

I cut a piece from a cooker hood carbon filter , a lot cheaper.

example https://www.ebay.co.uk/itm/Carbon-C...coal-Vent-Filters-for-All-Hoods-/172950364228
Those are the original ones, if you have a factory fit they nearly always fit a roof or underfloor vent, manufacturers have been doing it that way for quite a few years now.
Had the door type in our first van nowhere near as good as the canister filters, also tried using the cooker hood filters, that gave very poor performance compared to the genuine filters.
 
Last edited:
Nov 4, 2011
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How about a piece of motorcycle inner tube around the filter, to blank the hole off.

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