Truma leaking hot water overflowing (1 Viewer)

[Moss]

Just flashed up the boiler ready to go away. Water heating beautifully but the clear pipe from the boiler hot water going through the floor is constantly dripping. What’s causing it? Can I go away like it without causing damage? Can I clean it out if it’s something sticking or does it need replacing.
Thanks

 

[Lenny HB]

There is a valve inside the Tee piece new valve is about a tenner. The valve is to let air out when the boiler fills. You can temporarily clamp the clear pipe until you get a new one.
You could try taking the Tee off and soaking in white vinegar & water to clear any calcium that may be causing it to stick.

 

[Moss]

There is a valve inside the Tee piece new valve is about a tenner. The valve is to let air out when the boiler fills. You can temporarily clamp the clear pipe until you get a new one.
You could try taking the Tee off and soaking in white vinegar & water to clear any calcium that may be causing it to stick.

Thanks for responding. I take it I will need to drop all the water and open the boiler dump valve.

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[Moss]

Thanks for responding. I take it I will need to drop all the water and open the boiler dump valve.

 

[Lenny HB]

Thanks for responding. I take it I will need to drop all the water and open the boiler dump valve.

Only need to drain the boiler a bit as it's at the top.

 

[Moss]

Only need to drain the boiler a bit as it's at the top.

Cheers Lenny for all your advice and help
Martyn

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[pwilmo]

Hi there Lenny
Not to nit pick, your knowledge and experience are far beyond mine.
However the valve at the top is to let air IN when emptying the boiler .. to prevent a vacuum above the water level stopping the boiler emptying.
Your remedy is spot on though, clean or replace the valve, as it is stuck open letting water pressure through

 

[Lenny HB]

However the valve at the top is to let air IN when emptying the boiler .. to prevent a vacuum above the water level stopping the boiler emptying.

You had better tell Truma then as they obviously don't how the boiler they designed works.

 

[1967bowesj]

You had better tell Truma then as they obviously don't how the boiler they designed works.

Surely it’s a pressure release valve, if it was to let air in it would not have the drain pipe attached.

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[pwilmo]

I have had the valve apart and the valve works one way ..lets air in, but obviously they are aware the valve is prone to scale/ bits blocking the valve in the open and not closing properly
hence the attached outlet pipe .

 

[Lenny HB]

Surely it’s a pressure release valve, if it was to let air in it would not have the drain pipe attached.

It's to let air out when the boiler is filled after being empty it also doubles as a pressure relief but it is not its main function.

 

[pwilmo]

And of course Truma know how their boiler works and the valve is prone to sticking open, that is why they have added a pipe so dripping is visible and directed out of the van.

No Lenny the valve opens inwards and close when pressure is applied by the boiler fill as per diagrams

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[pwilmo]

Yay let's not bunfight, great comments
Cheers folks hope you fix your boiler

 

[RM_Marine]

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[mitzimad]

im with pwilmo on this one lenny its basically there to break the vacumn

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[Moss]

Thanks everyone for your thoughts found the culprit the bits were in the bottom probably blocking it. Ordered a new one