Excessively high amount of water going into expansion tank?

RYU8 · 13 Jan 2013

I recently got a wet underfloor heating installed and every time I have it on it sends a lot of water into the expansion tank. If ch and hw are on by them selves there's no problem. The UFL has its own manifold and pump. Both ch and UFL pumps are on no 1. Temp of flow to UFL circuit is on no1.
Any help would be appreciated.

D_Hailsham · 13 Jan 2013

Is the water coming out of the vent pipe? That's the one which hangs over the expansion tank.

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Excessively high amount of water going into expansion tank?

RYU8

D_Hailsham

DIYnot Local

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