FX5 Filter Question

[DALaws]

No argument intended here. But I disagree! I am a Commercial pump Rep. for large pumps. These pumps have discharge and suction on same level. The pump still has to overcome the height of piping. I agree with the loss from fittings,etc, but that is in addition to the height in Ft. the pump has to overcome. That is why many design engineers make a mechanical room in the middle of a large building and not the basement!

 

[nub]

Funny, I'm also a rep for comercial and industrial pumps. I don't intend to jack the OP's thread but I think a canister filter in aquaria is a little differant than comercial applications. What you said about the pumps you deal with having the suction and discharge at the same level is true but it sounds like you're refering to the flanges themselves. If you take a canister filter and disconnect power what happens to the water level in the supply and discharge lines? They equalize at the waterline of the tank. The weight of the water in the in the suction line equalizes the weight of the water in the discharge line. The only vertical distance the pump has to overcome is from the waterline up and over the rim of the tank. Lets now say you have a thirty story building. This building most likely is going to have a mechanical room in the basement and another around the fifteenth floor. The basement is the where the city supply comes in and feeds the lower floors up to a certain point. Booster systems are used to supply the upper levels. Shut off power in one of these systems and what happens? Check valves prevent back flow. What if they didn't use check valves, would the system stay filled? I think not. The pumps have to overcome the weight of the water to get it to the end point however many stories up. This is vertical head.