Thanks for printing! don't forget to come back to superior plumbing for fresh articles! The boiler accepts requeats for heat in the house from the control panel, but not hot water, so unless the heating has been on, we have no hot water.... From replacement boilers to complete central heating installations we offer free quotations and will beat any written quote! Filling loop is a hose connector between the fresh water system and heating system ... It goes without saying that if you try all of.