Why does dirt and algae pass through your swimming pool cartridge filter The pump and filter are brand new The pressure and water flow is good?

Answer 1

Check to see if the seals at the ends if the cartridge are properly installed. Otherwise get advice from the manufactures or retailer that sold you the gear. What does "good" indicate? Need figures to determine that. Most likely there are 2 reasons. 1. your filter cartridges are old and very dirty - in that case replace them with new. 2. The other culprit could be that the new pump is over pumping the filter. The filter has a GPM rating from the manufacturer and you cannot exceed that. If the pump produces more than the filter can handle then you will have "blowby". I suspect that whoever replaced the pump did not do the hydraulics for the new and the old pump. If the old pump was either a bronze (metal) pump and the new pump is of the new generation plastic pumps then this is most likely the problem. The new generation pumps far exceed the old style pump. Example: old 2.0 hp. pump can be replaced with a 1/2 or 3/4 hp. pump and still pump more than the old one. You could install a 7 hp. pump on a standard back yard pool but it will not pump any more than the size of the Plumbing that is already installed which could be 1.5" or even 2" - the pipes will only pass what they can handle in that size range. You would most likely have to go to 3" or even 4" pipe to handle that volume. I surmise that the old pump may have been a 1.5 or 2.0 horse power pump and was replace by the same horse power. The correct way to do that would be to do an hydraulics calculation, look at the specs of the old pump, look at the specs of the new pump, determine the size and length of the plumbing at the pool, calculate the correct horse power pump ( which would be of a lesser horse power than the old pump). Even if the new pump was registering the same pressure on the large tank(filter) that does not mean that it is accurate. In doing the hydraulics you can determine what the pipes can handle as far as volume is concerned. It is a little more complicated to go into here and will take up too much space to work out hydraulics. There are many factors to figure into the equasion. If this is the case and the pump and installation of the pump are less than a year old you have the right to have them take out the wrong installation and have them correct it at their cost. My other question is. Did the company that isntalled the new pump etc have a contractors license? If not you may have other legal items on your list to tackle. If you installed the pump then you have no recourse ... you are stuck with it. An over pumped pool system will fail at: the pump, the heater, the filter and the plumbing. Not particullarly in that order. All peices of equipment on the pool equipment pad have manufacturer's specs as to hydraulics. First one component then another will be affected. If you have copper plumbing and you do if you have a heater - the heater will be the first to go. Overpumping the heater will blow the heat exchanger. Those are about 4 fifths the cost of a new heater. Quite an expensive mistake to make. All aspects of the pool plumbing wise will factor in the decisions of modifying or replacing the equipment etc, etc, etc.