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    OSO 20 indirect unvented hot water tank

    I'm having strange problems with an OSO 20 hot water tank. We recently had the TPR valve and expansion valves changed for water loss from the tundish. Then we had an external expansion tank fitted as the hot water was initially flowing at extremely high pressure and temp and unstable. This was...
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    Leaking worcester danesmoor 20/25

    Having boiler trouble. The boiler was serviced last week. It had been working fine. Following the service the pressure dropped to sub 1 bar. I topped this up and it dropped again. Water was leaking out of the external pipe. I called the plumber who said it was the pressure relief valve. Thats...
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    Grundfos alpha 25-60 pump

    Hi I need to replace a Grundfos alpha 25-60 pump. Its the circulation pump for the underfloor heating. It seems to be a rare pump and very expensive. Can I replace it with a similar pump, say the alpha 15-60? Help appreciated, thanks
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    Underfloor heating

    Hi I have a problem with underfloor heating. The upstairs radiators and boiler all seem OK. The pressure in the underfloor manifold is pulsing, I suspect due to the pump function. The pump is a Grundfos alpha 25-60. The temperature under the floor has dropped to 25 degrees C and the house is...
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