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How to replace the outlet valve on a Caroma 230 cistern?

I have a leak into the toilet from the outlet pipe because (I'm assuming) the rubber seal inside the tank is not closing well enough anymore.

I was looking on the Bunnings site for a complete replacement Outlet Valve thinking "I can just replace it, should not be a big deal", but then realized something weird:

On most "standard" cisterns that I found searching online, there is just "a hole" on the bottom of the cistern, and this is where a new Outlet Valve unit would fit THROUGH the hole and then you lock it in with the screw-on adapter from below to lock it with the seals against the hole, but the Caroma 230 Cistern has a FIXED bottom section, with the thread built into the part that sticks out (image below) which would mean that I can't use a replacement from Bunnings unless - I'm guessing here - I "drill out or cut" the fixed part first? and then pass the replacement through the hole and use the locking system build into the replacement?

Community manager's note: Check out How to fix a leaking toilet for expert advice.

Caroma Model 230 Cistern FIXED outlet.jpg

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EricL

Hello @Taurondir

Welcome to the Bunnings Workshop community. It's marvellous to have you join us, and thank you for sharing your question about replacing the outlet valve of your Caroma cistern.

You're absolutely correct on your assessment about this toilet cistern. It is not a simple replacement method as it looks like the flushing mechanism is integrated into the cistern itself. Would it be possible for you to post a photo of the inside of the cistern itself. We'll need to see what the layout looks like inside the cistern and how the flushing mechanism is installed.

Please make sure to take a photo of the inside of the cistern without water so that we can see the guts of it. I'm sure there is a way to disassemble it as Caroma would not build something that can't be repaired or serviced.

We look forward to seeing the photos.

Eric

Taurondir

Added more detailed images below with some dimensions for reference.

At the moment, I assume that the "Option 1" simplest solution to try out would be to obtain a new black rubber washer to see if it makes a better seal to the outlet hole in the cistern. "Option 2" might be just to install a new cistern, hence why I measured the mount holes, as hopefully that's a standard dimension and no new holes need punching in walls.

I have not looked at "complete cistern" replacement options on Bunnings because I'm very new at this stuff and I'm not sure I'd choose the right item, hence why I'm on this forums atm. I had already purchased and installed a new inflow valve from Bunnings because the previous one broke, but I assume most new cisterns come with all the inside parts?

Outlet_Valve_01_ED-50%.jpg Cistern_Out_ED-50%.jpg Cistern_Main_ED-50%.jpg Outlet_Valve_02_ED-50%.jpg Cistern_Out_Connector_ED-50%.jpg

MitchellMc

Hi @Taurondir,

The first thing to do here is to replace the seating washer. Pull your washer off the fitting and take it in-store to be matched up. You'll find this step-by-step guide useful: How to fix a leaking toilet. You've already got the flush valve out, so replacing the washer should be a sinch! Replace it and see if that solves your issue. If it doesn't, personally, I'd just replace the cistern. Cisterns are relatively universal, and something like the Estilo White Linksuite PVC Cistern WELS 3 Star 6.3 L/full should do the job. I wouldn't muck around trying to drill out the bottom of your current cistern.

I don't see any reason why replacing the seating washer wouldn't resolve your issue.

Please let me know if you have any questions.

Mitchell

Taurondir

Thanks for the all the advice.

I will first just purchase a seating washer to see what happens as that's the "cheap test fix", and if I don't get the results I want I will get a new cistern and throw away the disgustingly old one my house has.

I have been trying not to make too many extra holes in the walls of my house, but this time it seems warranted.

MitchellMc

Hopefully, if the holes need to be adjusted @Taurondir, the previous one will be covered by the new cisterns footprint.

Keep us updated and shout out if you run into any issues.

Mitchell

Taurondir

Fixed leak with one of these.

I uploaded an image because I cant seem to put the URL link into this message.

FIX-A-LOO Seating Washer - Suits Caroma And Dux - Bunnings Australia.jpg

MitchellMc

Great work @Taurondir! Many thanks for updating us on your solution.

Reach out anytime you need assistance with a project around the home or garden; we're here to help.

Mitchell

susybarre

Hello Michell,

I found this post because I’m having problems with what I think is the filling valve. The water tank is not filling up even there is good water pressure and no debris in the filter so I tried to remove it to replace it, but it seems to be fixed to the tank…is that possible or maybe it’s just very tight and stuck? It is the exact same one to the one posted in Taurondir photos.

The black water/debris came from the seal in between.

Thank you.

EricL

Hello @susybarre

Welcome to the Bunnings Workshop community. It's marvellous to have you join us.

I suggest unscrewing the brass nut under the filling valve. This will allow you to remove the filling valve from the cistern. You can then replace the inlet valves washer and the Oring if needed. I've placed a few images below to help with your repairs.

If you need further assistance, please let me know.

Eric

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