Please Help... I just moved into a new house and i have a problem with my hot water pressure.. The House has a Vanguard MANABLOC®. plumbing system that i know nothing about... when i first had the water turned on, the water pressure was good.. since the water has been turned on the hot water pressure has dropped dramatically.. it is barely flowing.. so i was wondering if there is a screen on the water inputs of the Manabloc? or How can i fix my problem??