Condensate pipe blockage

bsr · 30 Oct 2022

Hi

I've got a Greenstar CDI. The condensate pipe has been blocking. I only find out when the whole run fills up, the hose from the syphon pops off and water leaks. I blow down the Flexi hose in the boiler and the blockage clears temporarily.

Here's a pic of the join from condensate to waste. There seems to be some grey crud in the clamp which I've cleaned out. Is this a good or bad way of doing things? I've not seen these clamps before.

Would you agree the blockage is most likely at the join? The WM trap has not overflowed. What would you do?

I was thinking of replacing the clamp with a Tee and solvent reducer?

Thanks

CBW · 30 Oct 2022

I would upgrade to a tee and reducer and make sure that there is sufficient fall to the wastepipe

Madrab · 30 Oct 2022

Is that condensate pipe above running at the correct fall? If so then the waste pipe below looks like it's running uphill. If that's the case then that will allow all the goo from the dishwasher and washing machine to pool at that low point and constantly clog it up, re-align the main waste pipe so it has a 40mm/m fall to the outflow and clean the run out.

IMO the condi clamp should be ok but it all needs to be kept clean, correcting the fall should allow it to be reasonably self cleaning.

Wayners · 30 Oct 2022

Gravity is your friend so use it. Top pipe needs fall not a horizontal run

bsr · 30 Oct 2022

Ok thanks. I've increased the fall, used another pipe clip just after the clamp to hold it up, cleaned it all out with a bottle brush (foul grey mess) and run the hose down it to clear it all out. Hopefully ok now. If that doesn't work I'll try the Tee and reducer.

Madrab · 30 Oct 2022

As suggested, just measure the length of the waste run and measure the height off the floor at every meter. Ideally you want a fall of around 40 - 45mm per M to the soil connection.

That and run your washing machine @ 60deg on a super quick wash with nothing in it but the detergent once a month, that'll help flush the waste clean.

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Condensate pipe blockage

bsr

CBW

Madrab

Wayners

bsr

Madrab

DIYnot Local

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