Good morning! We have 2 Dometic toilets in our 2019 Alpine 3700FL. The water jets in the bowl leak after flushing. The water pulses out but not bad enough to get on the floor or anything and eventually it stops.
I have tried cleaning out any mineral build-ups in the jets with Lime-a-way and little cone brushes but that hasn't helped. I'm thinking the inlet water tube may have mineral build-up. I'd rather not take the toilet apart if possible.
Anybody out there had this problem? Thank you very much.
First, are you using a water pressure regulator on the water input line? If not, chances are that you're putting too much pressure into the toilet rim and that's the issue... As for "post foot pedal release when flushing" you'll find that the toilet will continue to "leak" or more appropriately, "bleed down volume" after you release the foot pedal. Part of that is designed to allow water to cover the ball valve that closes off the toilet bowl from the black tank. If the water stopped flowing immediately, there would be no water flow into the bowl to form the water seal that keeps odors from coming up into the toilet bowl...
The "rim jets" swirl water around the bowl to help flush anything on the bowl walls, then, when you release the toilet foot pedal, the waterflow slows to a trickle, the ball valve closes and the "trickling water" fills the bowl about 1" or so above the ball valve depth....
If you're having "both toilets on a relatively new trailer" splash water over the rim, I'd first get a pressure regulator (NOT A VOLUME LIMITER), adjust the pressure to 40-45 PSI and see if that resolves the problem... But, the toilet is designed to "continue to trickle water into the toilet from the rim after the foot pedal is released. That is not a problem, its a feature.....
The 2019 Alpine uses the Dometic 310 or 320 toilet .. it’s a good toilet. But the weak link is the water shutoff valve..
Since both are doing the same thing the pressure regulator is an excellent idea..
And not one of these cheap so called pressure regulators as shown in first image..
Since the RV is a 2019 you might want to turn off the city water, bleed the toilet water pressure off and remove the water line once back of each toilet valve..
Use a bright flashlight and look into the backside of the valve and you will see a wire mesh screen..
These tend to get plugged up and can cause issues as a well .. especially if you aren’t using a quality outboard dual water filter on your city water line
The PDF I attached may give you a bit more insight as well
Yes Chuck S. That’s the “pressure regulator” I’ve used in the past. We’ll get one that actually has a gauge on it. I’ve thought about checking the water inflow system to see if there was issue with minerals in the screen. I’ll do that when we get parked again. Thanks for your reply and suggestions. I appreciate all the help I can get!
The small brass fixed regulator that Camco and a few others sell is nothing more than a “volume flow” restricter .. most folks don’t understand it and figure it’s good enough.
Sadly..it’s just a money waster ..
Money is better spent on a dual stage water to trap the junk that might be in the citY water before it gets into your Alpine
And a quality pressure regulator protects your entire water system from excessive pressure that could damage a fitting
The PEX water lines themselves are rated at 100 psi or better… the multitude of Tees and unions within the system are the weak link
And.. never ever leave your Alpine with the city water turned on.. doing so is an indentation to coming back to a heartbreaking flooded mess
This is a flow limiter/restrictor, they're available with or without the gauge, it restricts the flow regardless of pressure
This is the regulator you need, most are preset at 50-55 psi which is a good rv pressure. It will only affect the pressure if it exceeds the preset, it has no effect on.low pressures.
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Full-timed 10+ years
Sold '13 Redwood FB
Traded '13 GMC Denali DRW D/A
Replacement undetermined
Until you get your regulator fill the fresh water tank and use the pump. The on board pump should not exceed 60 psi. I'd also recommend a quality water filter. I use a canister water filter that takes 10" replacement filters. I use the filter when filling the fresh water holding tank as well.
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Marshall
2012 Laredo 303 TG
2010 F250 LT Super Cab, long bed, 4X4, 6.4 Turbo Diesel
Good morning! We have 2 Dometic toilets in our 2019 Alpine 3700FL. The water jets in the bowl leak after flushing. The water pulses out but not bad enough to get on the floor or anything and eventually it stops.
I have tried cleaning out any mineral build-ups in the jets with Lime-a-way and little cone brushes but that hasn't helped. I'm thinking the inlet water tube may have mineral build-up. I'd rather not take the toilet apart if possible.
Anybody out there had this problem? Thank you very much.
DO NOT take apart these toilets, you will not be able to get them sealed again. I just replaced our worn out 8 year old Dometic 310 with a new one, and the water does the same thing as on the old one, and that is normal. These are from the Dometic manual:
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Bob & Becky
2012 3402 Montana
2012 Chevy 2500HD D/A CC
Good morning! We have 2 Dometic toilets in our 2019 Alpine 3700FL. The water jets in the bowl leak after flushing. The water pulses out but not bad enough to get on the floor or anything and eventually it stops.
I have tried cleaning out any mineral build-ups in the jets with Lime-a-way and little cone brushes but that hasn't helped. I'm thinking the inlet water tube may have mineral build-up. I'd rather not take the toilet apart if possible.
Anybody out there had this problem? Thank you very much.
I am a little lost on your description of the issue. We have a Dometic 320, and the 310 is the same design with the water ports pointing down under the lip of the bowl, just like a residential toilet. Once the valve is closed, water drains from the bowl rim. How is yours spraying on to the floor.
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Russ & Paula and Belle the Beagle.
2016 Ram Laramie 3500 DRW 14,000# GVWR (New TV)
2005 Copper Canyon 293 FWSLS 32’ GVWR 12,360 Visit and enjoy Oregon State Parks
The 310 and 320 wlll spray water on the floor if the small holes are partially blocked with stuff that has got into the water system or calcium delist build ups..the only way to fix is use a small brush and clean out those spray holes so the water flows in the correct direction
Also if he is running excessive water pressure it will splash the water right out in the floor ..
The 310 and 320 wlll spray water on the floor if the small holes are partially blocked with stuff that has got into the water system or calcium delist build ups..the only way to fix is use a small brush and clean out those spray holes so the water flows in the correct direction
Also if he is running excessive water pressure it will splash the water right out in the floor ..
Interesting, we have been full timing for five years with our Dometic 320 toilet. The only issues we have is needed to replace the flush valve seal and replace the water valve as it would occasionally leak on to the floor.
If I had water that bad I would be looking at a high end filter system.
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Russ & Paula and Belle the Beagle.
2016 Ram Laramie 3500 DRW 14,000# GVWR (New TV)
2005 Copper Canyon 293 FWSLS 32’ GVWR 12,360 Visit and enjoy Oregon State Parks
Interesting, we have been full timing for five years with our Dometic 320 toilet. The only issues we have is needed to replace the flush valve seal and replace the water valve as it would occasionally leak on to the floor.
If I had water that bad I would be looking at a high end filter system.
I think you're "intermixing" the 310 rim/flush hole configuration with the 320 rim/flush hole configuration. They are not the same !!!
The 320 has a "overhanging rim with flush holes under the rim and pointed down"...
The 310 does not have an "overhanging rim". Rather it is a "flat bowl with the flush holes near the top. There is no "rim" to divert the water flow down, into the bowl. Any high pressure or buildup to divert the flow velocity or direction will/could result in water flowing up the "open rimless bowl" and over the edge, onto the floor.
We like the 310s and too high water pressure WILL shoot water right out of and over that rim into the floor - btdt when I was too lazy to put on the water pressure regulator at that moment. Regulator solved that problem.
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Danny and Susan, wife of 56 years
2019 Ram 3500 Laramie CC SWB SB 6.4 4x4 4.10
2020 Montana High Country 331RL
There is no water spraying on the floor from our toilets. After flushing, water pulses from the jet around the bowl. I understand the extra water filling the bowl after flushing. This is a new issue that just started after being in western Arizona awhile.
If the toilet works, the water doesn't flow over the rim when flushing and the bowl fills with water to seal the ball valve/seal so gasses can't leak up into the toilet from the black tank, I'm not sure that I'd focus on "pulsing after flushing". It may be normal and with a properly adjusted water pressure, if BOTH toilets are doing the same thing, I'd consider that "since nothing is broken and everything is working, it must be normal.
If one were "pulsing" and one was "not pulsing" then I'd wonder which is broken, but with both doing the same thing, I'd not worry too much, nothing is being damaged from the "unique behavior of both toilets"...
In my post #10 above, the Dometic language says trickle but ours also ‘pulses’, and that pulsing is because there is no inlet to allow air into the rim cavity and the pulsing is what happens when the water is draining out, allowing air in and the water out.
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Bob & Becky
2012 3402 Montana
2012 Chevy 2500HD D/A CC
We like the 310s and too high water pressure WILL shoot water right out of and over that rim into the floor - btdt when I was too lazy to put on the water pressure regulator at that moment. Regulator solved that problem.
Well I guess we didn’t look that much at the 310, as we wanted the oblong bowl. I was taught as a young man that a gentleman sits to urinate at home, so as not splash urine on the walls and floor.
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Russ & Paula and Belle the Beagle.
2016 Ram Laramie 3500 DRW 14,000# GVWR (New TV)
2005 Copper Canyon 293 FWSLS 32’ GVWR 12,360 Visit and enjoy Oregon State Parks
Well I guess we didn’t look that much at the 310, as we wanted the oblong bowl. I was taught as a young man that a gentleman sits to urinate at home, so as not splash urine on the walls and floor.
I guess I was raised a "heathen". A man urinates standing up if allowable, a large enough bowl allows that and if a "gentleman" can't keep from splashing on the walls and floors ??? or clean up...... DW likes her 310s, if you would like to inform her she is wrong or has made the wrong choice, having used both, I'll turn you over to her...
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Danny and Susan, wife of 56 years
2019 Ram 3500 Laramie CC SWB SB 6.4 4x4 4.10
2020 Montana High Country 331RL
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