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The hockey stick should swing towards the 3/4" pipe and free flowing/ swing when called for, once the bees wax get hot enough.don't force it open.
If you call a zone and that zone doesn't open the head is bad,you can p/u one at homes for about 80-90 bucks,if you change it out turn the power off to your boiler,so you don't short out your transformer.
Best O luck.
5/0
Posted from my iPhone/Mobile device
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