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Fixing Leaking Ferro Radiator Valve: Disassemble, Replace O-Rings / Entire Valve

JanekSokół 59151 6
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  • #1 15133127
    JanekSokół
    Level 6  
    Posts: 164
    Rate: 51
    My Ferro radiator valve is leaking.
    If it is unscrewed and I move it, I press it, water droplets fall out.
    Probably some rubber O-rings inside have ceased to fulfill their function, I suspect.

    Does it somehow disassemble, replace the middle element?
    Or maybe the entire valve to be replaced?

    Fixing Leaking Ferro Radiator Valve: Disassemble, Replace O-Rings / Entire Valve

    Added after 29 [minutes]:

    I've made it to this point, what next?




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  • Helpful post
    #2 15133280
    Nemonek
    Level 27  
    Posts: 774
    Help: 106
    Rate: 377
    You are in a good position for the valve to have a gland. Try to tighten the nut at the top (the one from which the water is leaking). If that doesn't work, you have to unscrew it completely, there should be a hold-down ring underneath and a gasket that needs to be replaced (a little water will flow, but not much, so secure the floor). Ferro valve cross-section:
    Fixing Leaking Ferro Radiator Valve: Disassemble, Replace O-Rings / Entire Valve
    As a last resort, you can put silicone under this cap and screw it on
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  • #3 15133319
    JanekSokół
    Level 6  
    Posts: 164
    Rate: 51
    :D I tightened the nut at the top and it is not leaking yet. There was a plastic gasket underneath it.
    When I was regulating the water supply (radiator temperature), this nut unscrewed by the way.
    I'm just not sure if I also turned off the water supply to this radiator completely ...
    It will turn out tomorrow, because today the stove is off.
  • Helpful post
    #4 15136584
    Zbigniew Rusek
    Level 38  
    Posts: 3610
    Help: 394
    Rate: 1534
    These valves are not used to adjust the heater frequently as the gland packing rubs easily. In principle, they should be used sporadically, e.g. to turn off a radiator.
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  • #5 15136607
    JanekSokół
    Level 6  
    Posts: 164
    Rate: 51
    Right, I regulated a lot and the result started to leak.
    Now I turned the flow to the max, I also tightened this cap to the max (by hand, quite tightly) and it does not leak.

    By the way, I ask - are there any rules for changing this valve to a thermal one? Just a replacement and it will work?
  • Helpful post
    #6 15136853
    Nemonek
    Level 27  
    Posts: 774
    Help: 106
    Rate: 377
    You probably mean a valve with a thermostatic head, just a replacement and it's supposed to work.
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  • #7 15594389
    JanekSokół
    Level 6  
    Posts: 164
    Rate: 51
    OK thank you.
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Topic summary

✨ The discussion revolves around fixing a leaking Ferro radiator valve, suspected to be caused by worn rubber O-rings. Initial advice suggests tightening the nut at the top of the valve, which may stop the leak. If that fails, disassembly is recommended to replace the gasket and hold-down ring. The user successfully tightened the nut, temporarily stopping the leak, and inquired about replacing the valve with a thermostatic one, which was confirmed to be a straightforward swap.
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