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Thetford toilet leaks down

L
Larry
Fri, Sep 10, 2021 5:06 PM

So...I've got this Thetford toilet, that I installed back in 2006.  If I put a couple of inches of water in the bowl, it leaks down into the holding
tank in about 1hr. I'm not familiar with the internal construction of it, so need to know if there is a gasket/"O"ring or something in there that drys
out and leaks, and if so is it and how is it replaced. Anyone???? TIA

Larry
78 Royale w/500 Caddy
Menomonie, WI.

So...I've got this Thetford toilet, that I installed back in 2006. If I put a couple of inches of water in the bowl, it leaks down into the holding tank in about 1hr. I'm not familiar with the internal construction of it, so need to know if there is a gasket/"O"ring or something in there that drys out and leaks, and if so is it and how is it replaced. Anyone???? TIA -- Larry 78 Royale w/500 Caddy Menomonie, WI.
MC
Matt Colie
Fri, Sep 10, 2021 5:21 PM

Larry wrote on Fri, 10 September 2021 13:06

So...I've got this Thetford toilet, that I installed back in 2006.  If I put a couple of inches of water in the bowl, it leaks down into the
holding tank in about 1hr. I'm not familiar with the internal construction of it, so need to know if there is a gasket/"O"ring or something in there
that drys out and leaks, and if so is it and how is it replaced. Anyone???? TIA

Larry,

The problem varies form model to model, but a common issue is calcium fouling of the valve parts.  So, the first try should be pouring a little dilute
HCl like CLR or the like.  It may take a couple of passes if it works at all.  Mine got bad enough that I had to take it apart and clean them
individually, but that held for a few years.  Rebuild kits are available, just don't order them from Thetford if you need it soon.

I live a few miles away and when I ordered parts, they didn't show up in good time.  So, I called again and was told that they wait three days before
shipping anything.  Order from a reliable supplier in stead.

Again model dependent, they are all more or less easy to service.  The type with a flat blade valve are a spin off of the Thetford valve and work just
like it.

I suggest that you do this before the weather goes cold.  The most difficult part with most of the Thetford pots is dismounting it.

Matt

Matt & Mary Colie - Chaumière -'73 Glacier 23 - Members GMCMI, GMCGL, GMCES
Electronically Controlled Quiet Engine Cooling Fan with OE Rear Drum Brakes with Applied Control Arms
SE Michigan - Near DTW - Twixt A2 and Detroit

Larry wrote on Fri, 10 September 2021 13:06 > So...I've got this Thetford toilet, that I installed back in 2006. If I put a couple of inches of water in the bowl, it leaks down into the > holding tank in about 1hr. I'm not familiar with the internal construction of it, so need to know if there is a gasket/"O"ring or something in there > that drys out and leaks, and if so is it and how is it replaced. Anyone???? TIA Larry, The problem varies form model to model, but a common issue is calcium fouling of the valve parts. So, the first try should be pouring a little dilute HCl like CLR or the like. It may take a couple of passes if it works at all. Mine got bad enough that I had to take it apart and clean them individually, but that held for a few years. Rebuild kits are available, just don't order them from Thetford if you need it soon. I live a few miles away and when I ordered parts, they didn't show up in good time. So, I called again and was told that they wait three days before shipping anything. Order from a reliable supplier in stead. Again model dependent, they are all more or less easy to service. The type with a flat blade valve are a spin off of the Thetford valve and work just like it. I suggest that you do this before the weather goes cold. The most difficult part with most of the Thetford pots is dismounting it. Matt -- Matt & Mary Colie - Chaumière -'73 Glacier 23 - Members GMCMI, GMCGL, GMCES Electronically Controlled Quiet Engine Cooling Fan with OE Rear Drum Brakes with Applied Control Arms SE Michigan - Near DTW - Twixt A2 and Detroit
JK
Jim Kanomata
Fri, Sep 10, 2021 5:28 PM

Almost all will leak down due to age of gasket and build up.
If your concerned about oder, pore water into the floor drain as it will
fill that goose neck and not gas will travel....

On Fri, Sep 10, 2021 at 10:22 AM Matt Colie matt7323tze@gmail.com wrote:

Larry wrote on Fri, 10 September 2021 13:06

So...I've got this Thetford toilet, that I installed back in 2006.  If I

put a couple of inches of water in the bowl, it leaks down into the

holding tank in about 1hr. I'm not familiar with the internal

construction of it, so need to know if there is a gasket/"O"ring or
something in there

that drys out and leaks, and if so is it and how is it replaced.

Anyone???? TIA

Larry,

The problem varies form model to model, but a common issue is calcium
fouling of the valve parts.  So, the first try should be pouring a little
dilute
HCl like CLR or the like.  It may take a couple of passes if it works at
all.  Mine got bad enough that I had to take it apart and clean them
individually, but that held for a few years.  Rebuild kits are available,
just don't order them from Thetford if you need it soon.

I live a few miles away and when I ordered parts, they didn't show up in
good time.  So, I called again and was told that they wait three days before
shipping anything.  Order from a reliable supplier in stead.

Again model dependent, they are all more or less easy to service.  The
type with a flat blade valve are a spin off of the Thetford valve and work
just
like it.

I suggest that you do this before the weather goes cold.  The most
difficult part with most of the Thetford pots is dismounting it.

Matt

Matt & Mary Colie - Chaumière -'73 Glacier 23 - Members GMCMI, GMCGL,
GMCES
Electronically Controlled Quiet Engine Cooling Fan with OE Rear Drum
Brakes with Applied Control Arms
SE Michigan - Near DTW - Twixt A2 and Detroit


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--
Jim Kanomata ASE
Applied/GMC, Newark,CA
jimk@appliedairfilters.com
http://www.gmcrvparts.com
1-800-752-7502

Almost all will leak down due to age of gasket and build up. If your concerned about oder, pore water into the floor drain as it will fill that goose neck and not gas will travel.... On Fri, Sep 10, 2021 at 10:22 AM Matt Colie <matt7323tze@gmail.com> wrote: > Larry wrote on Fri, 10 September 2021 13:06 > > So...I've got this Thetford toilet, that I installed back in 2006. If I > put a couple of inches of water in the bowl, it leaks down into the > > holding tank in about 1hr. I'm not familiar with the internal > construction of it, so need to know if there is a gasket/"O"ring or > something in there > > that drys out and leaks, and if so is it and how is it replaced. > Anyone???? TIA > > Larry, > > The problem varies form model to model, but a common issue is calcium > fouling of the valve parts. So, the first try should be pouring a little > dilute > HCl like CLR or the like. It may take a couple of passes if it works at > all. Mine got bad enough that I had to take it apart and clean them > individually, but that held for a few years. Rebuild kits are available, > just don't order them from Thetford if you need it soon. > > I live a few miles away and when I ordered parts, they didn't show up in > good time. So, I called again and was told that they wait three days before > shipping anything. Order from a reliable supplier in stead. > > Again model dependent, they are all more or less easy to service. The > type with a flat blade valve are a spin off of the Thetford valve and work > just > like it. > > I suggest that you do this before the weather goes cold. The most > difficult part with most of the Thetford pots is dismounting it. > > Matt > -- > Matt & Mary Colie - Chaumière -'73 Glacier 23 - Members GMCMI, GMCGL, > GMCES > Electronically Controlled Quiet Engine Cooling Fan with OE Rear Drum > Brakes with Applied Control Arms > SE Michigan - Near DTW - Twixt A2 and Detroit > _______________________________________________ > GMCnet mailing list > Unsubscribe or Change List Options: > -- Jim Kanomata ASE Applied/GMC, Newark,CA jimk@appliedairfilters.com http://www.gmcrvparts.com 1-800-752-7502
JH
James Hupy
Fri, Sep 10, 2021 5:28 PM

I spent several DAYS trying to install the repair kit. Damn big O ring from
the Thetford kit don't fit, and it leaked after I repaired it. Went to plan
"B". Threw the Thetford plastic toilet into the trash where it belongs, and
replaced it with a ceramic bowl one from their competitor. Just went to the
coach to put some frozen Lobster tails into the Fridge for Judy's 80th
birthday party, and I checked the toilet bowl. Yep, still holding water,
just like it was a month ago.
Jim Hupy
Salem, Oregon

On Fri, Sep 10, 2021, 10:06 AM Larry weidnerl@wwt.net wrote:

So...I've got this Thetford toilet, that I installed back in 2006.  If I
put a couple of inches of water in the bowl, it leaks down into the holding
tank in about 1hr. I'm not familiar with the internal construction of it,
so need to know if there is a gasket/"O"ring or something in there that drys
out and leaks, and if so is it and how is it replaced. Anyone???? TIA

Larry
78 Royale w/500 Caddy
Menomonie, WI.


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I spent several DAYS trying to install the repair kit. Damn big O ring from the Thetford kit don't fit, and it leaked after I repaired it. Went to plan "B". Threw the Thetford plastic toilet into the trash where it belongs, and replaced it with a ceramic bowl one from their competitor. Just went to the coach to put some frozen Lobster tails into the Fridge for Judy's 80th birthday party, and I checked the toilet bowl. Yep, still holding water, just like it was a month ago. Jim Hupy Salem, Oregon On Fri, Sep 10, 2021, 10:06 AM Larry <weidnerl@wwt.net> wrote: > So...I've got this Thetford toilet, that I installed back in 2006. If I > put a couple of inches of water in the bowl, it leaks down into the holding > tank in about 1hr. I'm not familiar with the internal construction of it, > so need to know if there is a gasket/"O"ring or something in there that drys > out and leaks, and if so is it and how is it replaced. Anyone???? TIA > -- > Larry > 78 Royale w/500 Caddy > Menomonie, WI. > _______________________________________________ > GMCnet mailing list > Unsubscribe or Change List Options: >
KH
Ken Henderson
Fri, Sep 10, 2021 5:50 PM

Larry,

I've sometimes had good luck using an old toothbrush and a bit of detergent
to scrub the gasket around the lip of the opened valve.  It's probably only
successful if a bit of paper has been trapped, but it's a Q&E fix, so worth
trying.  Can be smelly tho'.  :-)

Ken H.

On Fri, Sep 10, 2021 at 1:06 PM Larry weidnerl@wwt.net wrote:

So...I've got this Thetford toilet, that I installed back in 2006.  If I
put a couple of inches of water in the bowl, it leaks down into the holding
tank in about 1hr. I'm not familiar with the internal construction of it,
so need to know if there is a gasket/"O"ring or something in there that drys
out and leaks, and if so is it and how is it replaced. Anyone???? TIA

Larry
78 Royale w/500 Caddy
Menomonie, WI.


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Unsubscribe or Change List Options:

Larry, I've sometimes had good luck using an old toothbrush and a bit of detergent to scrub the gasket around the lip of the opened valve. It's probably only successful if a bit of paper has been trapped, but it's a Q&E fix, so worth trying. Can be smelly tho'. :-) Ken H. On Fri, Sep 10, 2021 at 1:06 PM Larry <weidnerl@wwt.net> wrote: > So...I've got this Thetford toilet, that I installed back in 2006. If I > put a couple of inches of water in the bowl, it leaks down into the holding > tank in about 1hr. I'm not familiar with the internal construction of it, > so need to know if there is a gasket/"O"ring or something in there that drys > out and leaks, and if so is it and how is it replaced. Anyone???? TIA > -- > Larry > 78 Royale w/500 Caddy > Menomonie, WI. > _______________________________________________ > GMCnet mailing list > Unsubscribe or Change List Options: >
JR
John R. Lebetski
Fri, Sep 10, 2021 11:26 PM

Yep like Ken says first step is a good cleaning. Maybe some simple green and a round toilet brush and go round and round with water pump off and pedal
to floor. Then repeat with water on. Yours is not old enough to be worn out IMHO.

John Lebetski
Woodstock, IL
77 Eleganza II

Yep like Ken says first step is a good cleaning. Maybe some simple green and a round toilet brush and go round and round with water pump off and pedal to floor. Then repeat with water on. Yours is not old enough to be worn out IMHO. -- John Lebetski Woodstock, IL 77 Eleganza II
DS
Douglas Smith
Sat, Sep 11, 2021 1:52 AM

Larry,
I've had good luck with a little tool I found that is mean to turn steaks on the grill. It has a point on a curved section that goes into the gate
valve groove in case some tissue gets trapped in there. Needless to say I don't use it for steaks.
Doug

Douglas & Virginia Smith,
dsmithy18 at gmail,
Lincoln Nebraska,
’73 “Sequoia” since ‘95: "Wanabizo";
Quadrabag/6 wheel disks/3:70 final/Paterson QuadraJet/Thorley’s/Alloy wheels/Sundry other

Larry, I've had good luck with a little tool I found that is mean to turn steaks on the grill. It has a point on a curved section that goes into the gate valve groove in case some tissue gets trapped in there. Needless to say I don't use it for steaks. Doug -- Douglas & Virginia Smith, dsmithy18 at gmail, Lincoln Nebraska, ’73 “Sequoia” since ‘95: "Wanabizo"; Quadrabag/6 wheel disks/3:70 final/Paterson QuadraJet/Thorley’s/Alloy wheels/Sundry other
MC
Matt Colie
Sat, Sep 11, 2021 2:29 PM

dsmithy wrote on Fri, 10 September 2021 21:52

Larry,
I've had good luck with a little tool I found that is mean to turn steaks on the grill. It has a point on a curved section that goes into the gate
valve groove in case some tissue gets trapped in there. Needless to say I don't use it for steaks.
Doug

Doug,

That sounds a lot like the "bent screwdriver" tool that Thetford used to sell for cleaning the seal.  I don't know if they still sell it.

Matt

--
Matt & Mary Colie - Chaumière -'73 Glacier 23 - Members GMCMI, GMCGL, GMCES
Electronically Controlled Quiet Engine Cooling Fan with OE Rear Drum Brakes with Applied Control Arms
SE Michigan - Near DTW - Twixt A2 and Detroit

dsmithy wrote on Fri, 10 September 2021 21:52 > Larry, > I've had good luck with a little tool I found that is mean to turn steaks on the grill. It has a point on a curved section that goes into the gate > valve groove in case some tissue gets trapped in there. Needless to say I don't use it for steaks. > Doug Doug, That sounds a lot like the "bent screwdriver" tool that Thetford used to sell for cleaning the seal. I don't know if they still sell it. Matt -- Matt & Mary Colie - Chaumière -'73 Glacier 23 - Members GMCMI, GMCGL, GMCES Electronically Controlled Quiet Engine Cooling Fan with OE Rear Drum Brakes with Applied Control Arms SE Michigan - Near DTW - Twixt A2 and Detroit
DS
Douglas Smith
Sat, Sep 11, 2021 7:37 PM

I'm not sure I get the point of this whole thread. Is your toilet supposed to hold water all the time? Ours flushes normally, doesn't smell and I've
never even checked to see if it holds water. My little tissue removal tool only sees use when the gate valve is obviously not fully closing.

Douglas & Virginia Smith,
dsmithy18 at gmail,
Lincoln Nebraska,
’73 “Sequoia” since ‘95: "Wanabizo";
Quadrabag/6 wheel disks/3:70 final/Paterson QuadraJet/Thorley’s/Alloy wheels/Sundry other

I'm not sure I get the point of this whole thread. Is your toilet supposed to hold water all the time? Ours flushes normally, doesn't smell and I've never even checked to see if it holds water. My little tissue removal tool only sees use when the gate valve is obviously not fully closing. -- Douglas & Virginia Smith, dsmithy18 at gmail, Lincoln Nebraska, ’73 “Sequoia” since ‘95: "Wanabizo"; Quadrabag/6 wheel disks/3:70 final/Paterson QuadraJet/Thorley’s/Alloy wheels/Sundry other
JH
James Hupy
Sat, Sep 11, 2021 7:45 PM

There is no trap under an RV toilet to prevent sewer gasses from traveling
through the toilet. That is the purpose of the water in the toilet. Just
because you cannot smell a colorless, odorless, volatile gas does not mean
that it is not harmful. Again, that is what the water does.
Jim Hupy
Salem, Oregon

On Sat, Sep 11, 2021, 12:37 PM Douglas Smith dsmithy18@gmail.com wrote:

I'm not sure I get the point of this whole thread. Is your toilet supposed
to hold water all the time? Ours flushes normally, doesn't smell and I've
never even checked to see if it holds water. My little tissue removal tool
only sees use when the gate valve is obviously not fully closing.

Douglas & Virginia Smith,
dsmithy18 at gmail,
Lincoln Nebraska,
’73 “Sequoia” since ‘95: "Wanabizo";
Quadrabag/6 wheel disks/3:70 final/Paterson QuadraJet/Thorley’s/Alloy
wheels/Sundry other


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Unsubscribe or Change List Options:

There is no trap under an RV toilet to prevent sewer gasses from traveling through the toilet. That is the purpose of the water in the toilet. Just because you cannot smell a colorless, odorless, volatile gas does not mean that it is not harmful. Again, that is what the water does. Jim Hupy Salem, Oregon On Sat, Sep 11, 2021, 12:37 PM Douglas Smith <dsmithy18@gmail.com> wrote: > I'm not sure I get the point of this whole thread. Is your toilet supposed > to hold water all the time? Ours flushes normally, doesn't smell and I've > never even checked to see if it holds water. My little tissue removal tool > only sees use when the gate valve is obviously not fully closing. > -- > Douglas & Virginia Smith, > dsmithy18 at gmail, > Lincoln Nebraska, > ’73 “Sequoia” since ‘95: "Wanabizo"; > Quadrabag/6 wheel disks/3:70 final/Paterson QuadraJet/Thorley’s/Alloy > wheels/Sundry other > _______________________________________________ > GMCnet mailing list > Unsubscribe or Change List Options: >