I fitted a Prestex P404 TRV under my wet-room sink. Water pressure is a steady 3 bar, balanced hot / cold feed. Before, there was no noise, no hammer, now, whenever I turn the tap off, I get pipe bang. Just one bang each time, & it only does it when the tap is on hot (Mono tap with 10mm tails).
I have held each pipe to feel for movement, all pipes are clipped & I have no idea where the noise is coming from. Could it be a faulty TRV?
I have held each pipe to feel for movement, all pipes are clipped & I have no idea where the noise is coming from. Could it be a faulty TRV?