I plan to get a new shower heater to replace a national brand that i've been using for 6-7 years. Water still very hot but the pump very noisy already and flow getting weaker. So now i want one with very strong pump. staying at top floor of apartment (11th) and also water quality problem, very dirty water (water tank) from Syabas. so are there any water heater that has STRONG pump and also filter (which can wash) to counter the dirty water problem?