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Old 01-04-2018, 09:40 PM   #1
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Toilet overflow onto Converter

A couple of days ago the water valve on the toilet started sticking open allowing a trickle of water into the bowl. A little upward pressure on the foot pedal would stop the leak. I ordered a replacement valve. Before I could get it replaced we had an toilet overflow that spread water to the kitchen. The valve must have begun leaking after use. Cleaned up the water and thought it was all good. The next evening the campground water was shut off during an extreme cold spell here in Louisiana so I started using the water pump. The next day the lights started to flicker, water pump cycling and Norcold showing DCLO message. Checked the batteries. Empty! Checked the breaker to the converter/Charger. Thrown. When I reset the breaker I got a loud pop and smoke. I guess the water got to the converter. So I’m replacing water valve and converter. Any words on converter replacement?
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Old 01-05-2018, 12:58 AM   #2
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While replacing stuff, return the valve repair kit, throw out the Thetford toilet & replace with a Dometic 310 or 320, as the Thetford WILL leak again if the foot pedal, which is half the price of the Dometic toilet, doesn't fall off first.
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Old 01-05-2018, 11:29 AM   #3
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Quote:
Originally Posted by travelin' texans View Post
While replacing stuff, return the valve repair kit, throw out the Thetford toilet & replace with a Dometic 310 or 320, as the Thetford WILL leak again if the foot pedal, which is half the price of the Dometic toilet, doesn't fall off first.
I agree X2
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Old 01-05-2018, 12:48 PM   #4
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I have had similar problem with Thetford valve sticking and causing water bowl to overflow. Try to remember and hold flush lever upward after toilet is flushed. Considering replacing complete toilet with Dometic.
Is it normal for RV toilets for the bowl to be dry or should they hold water in bowl like toilet in houses. Sometimes it holds water but most of the time it leaks out of bowl into black water tank. Another reason to replace complete assembly. Thanks for response.
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Old 01-05-2018, 01:33 PM   #5
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Once per year, I dry out the water from the bowl and spray the seals on the valve with silicone while working the valve back and forth. That really helps the valve seal and close much better. But, I also have a Dometic 310 toilet. By doing this procedure, I have never had a problem of the valve not fully closing after use.
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Old 01-05-2018, 10:09 PM   #6
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First of all thank you all for the recommendation for the Dometic. It is on our list of upgrades now. Here’s the weird issue with the leaking valve though. When the city of New Iberia finally restored the water to full pressure this morning the leaky valve stopped leaking. Coincidence or does the water pressure help close the valve? When it leaks again I will go with the Dometic. I took an additional precaution though and caulked around the bathroom floor to prevent a flood down the wall and into the kitchen should it happen again.
I completed the converter/charger replacement this afternoon without any issues.
Life is good.
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Old 01-05-2018, 10:31 PM   #7
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Yes! The low water pressure affected the Thetford toilet, not the Dometic. Also if you let the foot pedal slam closed hard it wouldn't leak. The Dometic toilet you'll find to be a 110% improvement over the POS Thetford. The Thetford made a great target for my sons new 45 & in my opinion that's all it was good for.
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Old 01-06-2018, 04:01 PM   #8
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Quote:
Originally Posted by travelin' texans View Post
Yes! The low water pressure affected the Thetford toilet, not the Dometic. Also if you let the foot pedal slam closed hard it wouldn't leak. The Dometic toilet you'll find to be a 110% improvement over the POS Thetford. The Thetford made a great target for my sons new 45 & in my opinion that's all it was good for.
hahaha! I see that stuff suffers the same demise at your house as it does mine! I had an Apollo convection oven from our Montana that suffered the same wounds, almost before it was removed .
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Old 01-06-2018, 07:25 PM   #9
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As a final note to my education I learned about check valves. Like the toilet valve the check valve doesnt work with low water pressure either. When we were having issues with city water at one point the water stopped working. We had pressure at the outside faucet but not into the RV. It wasn’t enough to push the check valve open. I was ready to change that valve too but as soon as the pressure returned we had water again. Who wuddu thunk pressure could affect these valves. It was a week of learning.
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Old 01-07-2018, 04:12 PM   #10
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We replaced the Thetford on our 2013 about year 1 with the Domeitic after the pedal fell off. Our Redwood neighbour at the campsite here still has that POS toilet and it overflowed, he put in a shutoff valve to turn off the water before the toilet to prevent another overflow.
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Old 01-07-2018, 05:34 PM   #11
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Ok. After so many recommendations to dump the Thetford I ordered the Dometic 311 with the optional sprayer from Amazon.
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Old 01-08-2018, 01:14 AM   #12
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While waiting for it to arrive this would be good time to add a valve behind the toilet & when getting the valve pickup an 18" flex hose with 1/2" fittings on both ends & a 1/2" close brass or plastic nipple, both will be required to connect the new toilet (at least mine did).
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Old 01-08-2018, 03:45 PM   #13
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Is the difference between the two Dometic johns just height? I've got a Thetford I should probably replace. It sets right over my inverter
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Old 01-08-2018, 04:17 PM   #14
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Height is the same, shape of the bowl is the difference. The 310 is a round bowl, 320 is an elongated bowl, both have the sprayer hose option. I got the 310 due to the size of our toilet area & it has worked flawlessly now for 3 years with high or very low pressure.
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Old 01-08-2018, 04:46 PM   #15
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Thanks Danny. I may have to measure before I put a long one in there.
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Old 01-08-2018, 10:53 PM   #16
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Thetford has a conversion chart that compares what will fit and won't fit with exact toilet swaps, some modifications etc... But this is from one Thetford to another Thetford and not the Dometics.

The pdf is too large to attach so here is a link to the chart:

http://www.thetford.com/wp-content/u...t_22x32_OL.pdf

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Old 01-08-2018, 11:18 PM   #17
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The 320 appears like your standard residential toilet without the tank. The 320 would've fit, but DW liked the 310 with all the rinse holes around the rim.
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Old 01-08-2018, 11:32 PM   #18
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I installed the Dometic 320 in our Redwood, it fits fine and I love the larger elongated seat.
The Dometic works much better than our original Thetford did.
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