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Subject Topic: Thetford C2 Flush pump replace
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20/3/2011 at 4:12pm
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I have had 2 trips away and the toilet flush has been intermittent so I have decided to change the pump as I have already freed it off once. One of the problems is the top tank is full of black grime is this caused by the previous user not using flush fluid?

The Thetford kits come with very good instructions, but I have put this on here so folks can see what is involved and hopefully try it them selves rather than paying out for an easy job to be done.

So firstly drain the flush tank. Because I will be flushing it too I have filled the aqua roll and connected the pump and put the water heater on

Lift out the toilet roll holder



Its pretty grimy in there



Unscrew the clamp holding the pump in



Lift out the pump with its cable and hose



Snip off the pump and bare the wires



New pump kit



Crimp the wires together (brown to brown) MAKE SURE YOU HAVE SLID THE PUMP CLAMP AND SHRINK WRAP DOWN THE CABLE FIRST



Heat the shrink wrap to seal the joint




That was easy wasnt it! Now the water will be nice and hot so using the sink mixer I filled the tank with WARM not hot water and have tipped in Fendox tank cleaner






I filled it right up and left it till the morning

Hopefully over night its done its magic, so drain it off it to a bucket



Once the tank is empty place the pump back in having connected the hose (push fit) and replace the holding screw.




The cable sits on a little clip above the water line.



Push the roll holder back in.

Well its not spotlessly clean but it is an awful lot better than it was, so I hope the pink stuff keeps it cleaner now and the pump lasts.

So why did I tip the fendox into a bucket? Firstly so I could see any debris it took out and there was a lot of big black bits. Secondly I placed my waste hog under the shower and tipped one bucket load down, then the same with the sink. This will stop any smells apparently. Thirdly it has now also cleaned out my waste hog! so I have given it a good shake and left to soak before rinsing down a drain.


Post last edited on 20/03/2011 16:21:24

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20/3/2011 at 5:13pm
 Location: Lancashire
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excellent post

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the only silly question is the one you do not ask.


20/3/2011 at 7:07pm
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July 1-9 Nantcol Waterfalls meet
Sept naturist week
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Nov hopleys meet


20/3/2011 at 7:58pm
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Yesh! someone is a dirty so & so to let it get that way or was it to tight to use the real stuff. Oh! yuk! makes you want to puke.Saw no marigolds on your hands though, not very wise floggit.Look what they left you.

Pictures are good ,if someone had to do the same thing . Very handy as pictures paint thousand words.'Shows' them how..



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Chrissie

Be Strong-Think positive.


20/3/2011 at 9:56pm
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I had black bits from the flush water when we got our van last year.

Others suggested that it was the thetford pink stuff that actually caused the bits in the firt place.

I cleaned the tank out with a warm solution of household soda crystals, flushed loads of black bits out and have used elsan fluids since .
No more black bits .

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Debbie


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20/3/2011 at 10:06pm
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I cleaned the tank out with a warm solution of household soda crystals, flushed loads of black bits out and have used elsan fluids since .
No more black bits

you can also use milton or fendox from fenwicks.



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the only silly question is the one you do not ask.


21/3/2011 at 11:27am
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I wonder if any one can help. We have got a problem with our flush. The pump appears to be working but nothing comes out (no its not empty). It has been suggested that it may be the solanoid??? Any thoughts and suggestions would be welcome.

Thanks

HC



21/3/2011 at 11:42am
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If the pump is working it is probably a hose that has come off. If you look on the Thetford website there are diagrams for most of their systems. Check that nothing has cracked or split due to freezing over the winter months.



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21/3/2011 at 6:45pm
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Quote: Originally posted by beanpark on 20/3/2011

Yesh! someone is a dirty so & so to let it get that way or was it to tight to use the real stuff. Oh! yuk! makes you want to puke.Saw no marigolds on your hands though, not very wise floggit.Look what they left you.

Pictures are good ,if someone had to do the same thing . Very handy as pictures paint thousand words.'Shows' them how..




Not really worried what I get on my hands, I work on a dairy farm and we have about 150 calves a year so normally my hand is up a cows ...........

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July 1-9 Nantcol Waterfalls meet
Sept naturist week
Sept SVR w/e
Oct Secret meet
Nov hopleys meet


21/3/2011 at 7:31pm
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Used to the old poo then or is the young poo

 Not quite the same, the difference between human poo & baby calf poo one could be Ah!!! the Yuk!!



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Be Strong-Think positive.


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22/3/2011 at 9:03am
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Quote: Originally posted by beanpark on 21/3/2011

Used to the old poo then or is the young poo

 Not quite the same, the difference between human poo & baby calf poo one could be Ah!!! the Yuk!!



There is a lot of it about on a farm!
Back to your earlier post the tank i was working on holds the flush water, and so the grime in there is like an algae and not human waste!

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July 1-9 Nantcol Waterfalls meet
Sept naturist week
Sept SVR w/e
Oct Secret meet
Nov hopleys meet


22/3/2011 at 9:15am
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A good soak in Puriclean should shift most of the algae and biofilm but as with any other chemical treatment it might be a good idea to check with manufacturer first. Thetford are doing a water treatment chemical that they are marketing for fresh water systems so that might be a better bet but I have not tried it yet. If anyone does try the Thetford stuff can they let me know how effective it is.

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24/3/2011 at 1:36pm
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Great pics and info, i too want to remove pump, but to see if the impeller is stuck, do i leave the electrics on when doing this, no men about so have to try myself before calling the caravan medic.  

Cheers Joyce

 



24/3/2011 at 2:40pm
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Yes the 12v cable and water pipe should be long enough for you to be able to turn the pump around and check the impeller, but in any case the pipe is a simple connection and at the worst if you have to completely remove the pump to replace it it is a simple job. There is loads of good info on the Thetford website detailing diagnostics and repairs.

-------------
'A sure cure for sea-sickness is to sit under a tree'


24/3/2011 at 3:00pm
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Quote: Originally posted by jomac on 24/3/2011

Great pics and info, i too want to remove pump, but to see if the impeller is stuck, do i leave the electrics on when doing this, no men about so have to try myself before calling the caravan medic.  

Cheers Joyce

 


before you go to the extent of removing the pump.give it a good soak in a strong solution of milton overnight and try the pump again in the morning.it works some times as they get clogged up with algae and slime. check fuses

-------------
the only silly question is the one you do not ask.


28/3/2011 at 2:44pm
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Hi again, just to update, it was the fuse, flush working again and i also cleaned tank out with milton overnight and oiled the impeller. Great job done.




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