the water will take a while to stop,try leaving the other taps open to allow air into pipework,make sure the hot water tank is cold,if it is warm the water will expand and constantly trickle out.also ensure cold feed valve is tightly shut,this valve is seldom used and debris can prevent it shutting completely,you could also try shutting valve on tank outlet in attic.might help.i've installed brand new systems and i've seen it take 20 mins for water to completely stop.Be patient.
steeveepee
December 2008
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