Shurflo Trail King 7 Running water problem

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Paddy79

Joined
May 12, 2021
Posts
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Bournemouth, UK
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81,165
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Fiat Ducato Karmann
Hi All,

I have checked the forums and cannot seem to find an answer to my problem. I have a Shurflo Trail King 7 (2095-204-113) water pump in my Fiat Ducato. For some reason the water does not stop running once the Truma electric system is switched off. The pump is only a year old and this problem has only arisen after a cold German winter, I emptied all the water from the tanks and pipes before the winter began in 2020.

To add a further issue the boiler does not produce warm water, warm air yes but warm water no. Maybe both issues are connected?

Any help would be appreciated.
Patrick
 
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It may be the frost valve on your boiler has opened and drained the water out. The pump may be running continuously because the dump valve is still open and the boiler is not filling up. I have no knowledge of your Truma electric system so unable to understand how these two might be connected. However, this might be a bit of a shot in the dark but its possible you have a manual for your Truma and if so there might be a page that cover's faults and remedies. There might even be a manual that explains how to open and close the drain in your boiler which might be worth exploring.
 
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Hi swifter and Phil and thanks for your responses very kind of you both. I checked the boiler dump valve and it has not helped :-( I have also completely emptied the tanks again then refilled them and tried everything again.
I find it strange that the water still comes out of the kitchen tap when everything is switched off?? I have also tried adjusting the pressure switch at the back of the water pump but do not want to fiddle around too much in case I make matters worse.
 
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So water comes out of the tap when it’s closed and the pump is off ?

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if there is air in the pipes, the pump will keep running as the pressure switch won't cut in
 
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if a tap still lets water flow even if off, it is knackered. Probably a little water in the tap froze and split it

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Paddy79 said:
so how do i release air from the pipes?
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you remove air by ensuring all taps are OFF before you start. then run cold on the furthest tap from the tank till it stops spluttering. Then repeat on the hot circuit. Make sure no water running out under the van first
 
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Just to get this clear in my head, the power to the pump is isolated and water is still flowing from the tap even though the tap is closed?
 
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Hi Eggs, yes the power to the pump is isolated, switched off via the Truma panel, but the water still continues to flow out of the kitchen tap afterwards. Maybe Thebig1 is correct in that the tap might have frozen over winter and therefore damaged it.

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My question is now if the tap has been damaged over the winter why would heating work and not the warm water for the van? Do you think these are two separate issues?
 
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Nice one for joining up . Well worth the money . I am no plumber but if the tap continues to let water out when the pump is off and the tap is closed then I would look at replacing that .
 
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if the water continues to flow, then the boiler can't heat it. fill your kettle and turn it on and then continually top it up with cold water. Pretty simple really
 
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Swifter said:
Nice one for joining up . Well worth the money . I am no plumber but if the tap continues to let water out when the pump is off and the tap is closed then I would look at replacing that .
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I agree about the tap but how is water getting to the tap if the pump is isolated? It sounds like it siphoning but surely that can't be so?

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I thought that as I was typing Eggs . Not sure how the water can flow like that . Weird problem . Hopefully the op can get this resolved .
 
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And the water wouldn't stop siphoning after 5 mins it would drain the tank before it stopped.
 
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I wonder how quickly the water is coming out of the tap? If the pump is pressurising the system the water could continue to flow from a faulty or damaged tap until the pressure is released. If it's just a trickle this could take a few minutes.
 
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Swifter said:
Nice one for joining up . Well worth the money . I am no plumber but if the tap continues to let water out when the pump is off and the tap is closed then I would look at replacing that .
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Yes it could well be the tap.

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Apparently that pump will pressurise to 30psi so would take a while to de-pressurise
 
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This does not make sense! if the pump is not running then no water is being pumped. If the tap is above the lever of the pump and water is coming out of the tap it will stop as soon as the pressure is relieved, almost immediately. With the hot water also not heating it could well be a trapped air issue. When I fill my water tank at the begining of spring there is a lot of trapped air in the system but I just open the taps, make sure there is enough water in the water tank, switch on the pump and open the taps. After a lot of spluttering and sometimes short blasts of air the pump stops, telling me the boiler is full and all the pipes are pressurised. I have never split a tap doing this but I do make sure a empty my tanks and pipes before the winter frost sets in. Are you absolutly certain the pump has stopped yet water is still flowing out of the tap. I would open the tap for a good while to make sure you have got the whole system full of water.
 
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Eggs said:
I agree about the tap but how is water getting to the tap if the pump is isolated? It sounds like it siphoning but surely that can't be so?
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My thoughts exactly how can the water pump itself to the tap and continue doing this for 5 mins..the water is a steady flow not a trickle..friggin weird.
 
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PhilandMena said:
This does not make sense! if the pump is not running then no water is being pumped. If the tap is above the lever of the pump and water is coming out of the tap it will stop as soon as the pressure is relieved, almost immediately. With the hot water also not heating it could well be a trapped air issue. When I fill my water tank at the begining of spring there is a lot of trapped air in the system but I just open the taps, make sure there is enough water in the water tank, switch on the pump and open the taps. After a lot of spluttering and sometimes short blasts of air the pump stops, telling me the boiler is full and all the pipes are pressurised. I have never split a tap doing this but I do make sure a empty my tanks and pipes before the winter frost sets in. Are you absolutly certain the pump has stopped yet water is still flowing out of the tap. I would open the tap for a good while to make sure you have got the whole system full of water.
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This is my first winter, well German winter so a lot colder than the uk but I made sure all water was out of the van beforehand.
 
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Paddy79 said:
This is my first winter, well German winter so a lot colder than the uk but I made sure all water was out of the van beforehand.
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Understood. I also leave the taps open then blow down the shower tube which gets the last remaining water in the pipes out. I'm not convinced your tap has split ! How many taps do you have in the van ? Are you absolutly certain the boiler is full of water and if it is you should be able to heat it. If not back to your manaul I would advise, maybe see if any fuses are blow. I assume you can heat your water by gas or electrick ???? Try both and see how you get on.
 
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