Static van towel rail leak. Advice reqd

[BotusBuild]

We are currently in a static van and have a slight leak on a towel rail.

I'm confused about how to isolate in order to fix the leak as the "valves" don't look like I am used to, and I don't want to undo the "cap" (see pic) to find the water just pours out.

Anyone worked on this kid of thing before?

FYI, heat source is a combi boiler.

 

Thanks in advance

[G and J]

I don’t think that’s a valve.  I think it is a T junction. 
 

they’re used to put an electric element in as well as the water flow from the boiler. 

[G and J]

So, depressurise your system, if it’s in a static I presume it’s not two storey, then undo that top bolt.  I think there will be a rubber ring thingy (technical term) in there. 

[BotusBuild]

58 minutes ago, G and J said:

depressurise your system

Next Q 🙂

Thus is what is below the combi boiler

And this is the closeup of the pressure

How do you depressurise?

[BotusBuild]

A simple case of bleed a radiator until the pressure reads zero?

[ProDave]

BEFORE you depressurise it to fix the leak, you DO have the fill loop needed to re pressurise it afterwards?

[BotusBuild]

37 minutes ago, ProDave said:

you DO have the fill loop needed to re pressurise it afterwards?

Not yet, but already on the shopping list🙂

[G and J]

10 hours ago, BotusBuild said:

Not yet, but already on the shopping list🙂

Our Worcester Bosch combi had a filling loop built in, operated by a plastic key thingy that lived clipped into a snap on panel.  I can’t see on that pipework where a filling loop would connect. 

[dpmiller]

6 hours ago, G and J said:

I can’t see on that pipework where a filling loop would connect. 

would the two capped-off valves that just need a flexi fitted between them not be a good start?

[BotusBuild]

That is what I will be trying. Carefully. 🙂

[G and J]

12 hours ago, dpmiller said:

would the two capped-off valves that just need a flexi fitted between them not be a good start?

Well I’ll go back to the bottom of the class then lol

 

So, while I’m in learning mode, one of those two with a plastic T and chrome thumb taps must be the cold feed.  I’d have expected a service valve or something to isolate the boiler but maybe there’s one inside the boiler.  What’s the other one with the plastic T then?  Hot water out or heating flow or return?

[BotusBuild]

Solved:

Depressurised by bleeding another radiator until pressure read zero. Water was still coming out of towel rail when that bleed screw was removed so I took the plunge and just loosened the nut at the bottom (second pic in OP) and reduced the water level inside before removing the bleed nut.

Put liquid sealant on the threads and put it back.

Left it for a few hours, then refilled via a new flexi loop on

On 25/11/2024 at 19:01, G and J said:

those two with a plastic T and chrome thumb taps  🙂

All now tikkety-boo!

 

[BotusBuild]

On 24/11/2024 at 10:59, G and J said:

I think it is a T junction.   (it was)