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Old 01-21-2022, 02:30 PM   #1
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Thetford Tecma Macerator Toilet Bowl Empties

I have two Thetford Tecma Macerator toilets in the coach. Both of them periodically decide to empty the bowl of water after sitting for several hours. The coach is a 2017 Winnebago Grand Tour that we have had for just over a year. We have never had this issue until a few weeks ago. Of course when we had the service technician take a look at it, it did not leak overnight. So his response is that it works OK. We have had it empty 2 times since.

Has anyone else had such an issue?

Thanks,
Bill
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Old 01-22-2022, 08:51 AM   #2
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Discharge hose has slipped......water is siphoning out

Top of hose should be at level of the toilet nozzles
Pull up on it
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Old 01-22-2022, 11:56 AM   #3
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Quote:
Originally Posted by Old-Biscuit View Post
Discharge hose has slipped......water is siphoning out

Top of hose should be at level of the toilet nozzles
Pull up on it
Wish I understood what your fine reply means......what is the toilet nozzle and where is that??????.......THANKS
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Old 01-22-2022, 12:13 PM   #4
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Toilet Nozzles......
Port/nozzle at back top of toilet where the water enters the bowl when flushing

Depending on actual Tecma Model ---can be One Nozzle or TWO

Top of macerator pump hose S/B in line with the nozzle(s)
*bottom Loop of hose Above the water level in toilet
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Old 01-22-2022, 01:27 PM   #5
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M8ne will sometimes empty when traveling. I just give it a flush when I park.
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Old 04-03-2022, 03:17 AM   #6
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One of my Two Tecmas does this while moving. Also the toilet that does this was replaced after initial delivery as it was the wrong color from factory due to shortages. The original, but wrong color toilet, did not do this.
So I have been told this is due to a faulty check valve in the replacement toilet and I have been waiting for
4 months to receive a replacement valve under warranty.
Sounds like the problem could either be a faulty check valve as reported by the warranty location or it could be a faulty installation/height of drain line causing a siphon effect.
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