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mutley racers

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Anyone fitted these? I am looking at installing an invented cylinder in my own house and while looking at secondary returns came across these.
 
install easy a pie and worked well but always in the back of my head something more to go wrong either with the sensor or the elec in the pump head for auto
 
Best price by far I found for the Comfort Auto Adapt is Mr Central Heating but don't go for Grundfos valves set they were nearly ÂŁ30.
2x 1/2" MI to C comp, 2x Lever Ball valves with a 1/2" flap type non return & a tee with drain off in-between.
 

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