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Discuss Uponor UFH, do i have a stuck valve? in the Water Underfloor Heating Installations area at PlumbersForums.net

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Hi all,
Thanks all in advance for any advice! (excuse my terminology - I am a basic DIY-er, but like to work things out)

I have a wet uponor UFH system. I am getting hot water to the valve in the picture attached, but it is not passing through the valve to the underfloor pipework. The underfloor system is calling for heat - the pump is triggering when the thermostats call for heat, but i cant get the hot water to feed. So in essence, the system is pumping round room temperature water (20c), and is not getting the top up from my hot water inflow.

i THINK the problem is this valve (is it called a manifold?). Hot water will not pass through. I have removed the casing, and the pin does operate freely up and down (whatever that does?!). I have also taken a photo of the inside as best i can. How do i know if this is broken? Is it as simple as replacing this part? I can isolate the flow with a valve upstream, would I just remove & replace?!

HELP (cold and frustrated)

valve1.jpg
valve_casingoff.jpg
valve_casingoffinside.jpg
pumpandtemp.jpg
 

ShaunCorbs

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ShaunCorbs

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Plumber
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