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Old 06-09-2016, 05:51 AM   #1
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Toilet not holding water

I have a Sealand China Toilet in my motor home and it will not hold water.
It seems to slowly drain out.
So, I took a fine brush and 'cleaned' the ball and seal but it still leaks.

I am going to take it apart today.

Is this an easy fix by replacing some parts?????
Is there a Kit that addresses this issue?

Please advise.....I have a RV shop about 30 min. from here so I expect that I can get parts there.

Thanks for the advice.
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Old 06-09-2016, 06:11 AM   #2
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For a Sealand toilet of this vintage, you will have trouble finding some parts on store shelves. They are all still available from Dometic. Parts seem to be less expensive in kits than individually.

We had a leaking vacuum breaker while on vacation last summer and could not find one. My co-conspirator in the passenger seat started calling every number in western New York, and found a mobile RV repair guy that had one. He left in in his mailbox for us, and we drove to his house and left cash to pay for it.


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Old 06-09-2016, 06:12 AM   #3
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After cleaning the ball and seal, try smearing a little silicone plumber's grease (available at home improvement stores or plumbing supply house) around the under side of the seal. That worked for me with the SeaLand toilet we had in the 10-year old motorhome we used to have. It would last for 2 or 3 months before I had to clean the seal again and reapply the grease.

If you do decide to replace the seal, it's a little expensive and the job is a little unpleasant. However, it's not hard to do.
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Old 06-09-2016, 06:17 AM   #4
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Check with your manufacturer. Ours makes a tool for cleaning and it works great.
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Old 06-09-2016, 07:41 AM   #5
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A little regular Vaseline around the seal worked well for us.
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Old 06-09-2016, 11:37 AM   #6
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I have heard that even Coconut oil is great to leave in the toilet, especially over winter. It is a bit more ecologically friendly than Vaseline or silicon.
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Old 06-09-2016, 10:54 PM   #7
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When TP and debris dries, it can become pretty hard. You might need more than a brush to clean the seal. I plastic tool, maybe something like a plastic chop stick, should be used and dragged around the seal. Put a glove on and check the seal with your finger for a smooth edge.
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Old 06-10-2016, 05:35 AM   #8
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UPDATE

Here's where I ended up.
I removed the pedestal cover, the ring and half clamps.
Disconnected water lines as needed and lifted the toilet from the base.

I removed the Teflon & rubber seal for examination.

Result:
I found that an extreme buildup of scale on the rubber seal as well as the ball caused the lack of a seal.

So, I carefully cleaned the ball using white vinegar and a plastic scraper.
Finished the ball with a stiff plastic detail brush to get down in the edges.

Next, I used the same plastic scraper and white vinegar to remove the scale from the rubber seal. This was done slowly and carefully so I didn't damage the seal surface.

Once cleaned, I applied a very thin coating of silicon vacuum grease to the ball and seal surfaces.

Put everything back together.

Result.
So far, the toilet is holding water.
If this works....great.
If not, I will order in a kit for ~$30 and replace the old one.

I will update in a few days .........................
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Old 06-10-2016, 05:49 AM   #9
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Do you know what model Sealand it is? We have a Traveler that we have replaced that seal twice. DW was smart enough to tape the bag the new one was in inside the cabinet above it to save the part number.

If you do order a new one I suggest buying an actual Dometic not an after market. Made that mistake and that is the reason for replacing it twice.
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Old 06-10-2016, 06:00 AM   #10
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For ALL of the Models in my Manual, the Part # for the Teflon & Rubber Seal Kit is: 316140.
I find this on the internet as: 385316140.

I believe my Model fit in the 910, 510, 2910 diagram but I have to do some measuring to be sure of the exact Model. There are some minor Dimensional Characteristics that separate the various models.

Looks like this kit will fit all of the models listed in my manual.

Thanks, I will be sure to get a Dometic Brand if I have to order.
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Old 06-10-2016, 07:28 AM   #11
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Since the same toilet is also used in boats, it in a bind, you could check local marine dealers for the parts.

I have 2 of the Vacuflush toilets on my boat. Leaking seals had been an issue for a while.

Last fall, when I moved aboard, I did something a little different.

After cleaning everthing up with no results, I tightened the band clamp with a ratchet and socket, rather then just a screwdriver. The seal funtioned properly for the six months we were aboard.

Who would've thought ?
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Old 06-10-2016, 10:23 AM   #12
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Just checked my toilet a few minuets ago and the water is still in there..............

I was looking on the internet and found my part # for the seal kit, BUT they are the ones with an overflow hole in them.
I suspect I am NOT to use these?????
AND, one seller said to just flip the top one over and use it!!!!!!!!!!!!!!!!

Makes sense to me.
I guess I have a toilet WITHOUT the overflow option.
So, I will have to use the "flip over" technique if I need a new one.

Anyone else have to address this concern?

Please advise...................Thanks.
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Old 06-10-2016, 09:18 PM   #13
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Silicone plumbers greased worked wonderfully for me. used it during the winter. It has held ever since. Also, ?I think it is Thetford that has the toilet valve treatment. This is also helpful for maintaining the seals.
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