I've been building my house for several years and the master bath has never been finished. The shower head and dual handle knobs were installed a while ago but the shower has not been regularly used. I just completed installing the sink fixtures and drain. The sink has low water pressure and the shower just trickles. When the shower was first installed the pressure was okay but now it's practically non-existant. All of the fixtures are new and the whole house has a water softener so sediment and/or mineral build up shouldn't be a problem. Any thoughts?