Hi flameport,
I removed the NRV and noticed a marked improvement in the hot water pressure coming through to the shower head with and without the pump turned on! Perhaps the NRV was overkill then given that the shower mixer already has integral NRVs...
So now, the hot water is trickling...
Hi
I've got a Grundfos 1.5-stc positive head twin impeller pump installed for my shower in upstairs bathroom. The 22mm hot feed comes from my hws via the warwick flange which I installed to ensure it had a dedicated feed with as less air as possible. The 22mm cold feed to the pump comes from...