Do you have an old filter that has seen the prime of it’s life? Perhaps you have a filter you want to replace or the housing is cracked and leaking. Have no fear, this is a relatively easy and inexpensive project. This guide shows you how to replace a Hayward Cartridge filter; however, this procedure is applicable to most other filters.
TOOLS YOU WILL NEED: 1) Hack saw 2) Plumbing tape 3) Indoor-Outdoor silicon 4) Adjustable pliers with 2 gap minimum 5) Square corner ruler or level 6) Magic marker 7) Medium sandpaper 8) PCV Cement 9) PVC Cleaner
Materials you will need: 1) Two PVC pipe couplings: One side threaded, the other side has no thread as PVC pipe will fit into the end. Measure INPUT and OUTPUT ports of the filter housing before purchasing. Typically it is either 1 1/2" or 2”. Once you establish the proper size, all other PVC material will be the same size.
Materials (cont'd) 2) Four 90º angle PVC couplings (photo shows 2 styles to choose from) 3) PVC pipe - you will have to approximate or measure anticipated length. An 8' length is a good start. Buy extra, you can always return it. Make sure the pipe is labeled "schedule 40" to handle the water pressure.
Now position the housing where you want it. In this photo, the output port (the lower of the two) lines up directly with the existing outlet pipe to the pool. It is important that this is aligned correctly and that the INPUT and OUTPUT PORTS are positioned properly. Remember, the output goes to the pool pipe. If you are unsure, usually there is a diagram on the front of the filter. Make sure there is plenty of space on both sides. You want a minimum of 6” of pipe extending from each outlet.
Now line up the filter output pipe with with the pipe to the pool, make a mark beneath the pipe with the marker and cut it so it butts up against the pipe. The pipe will slant down a little, lift it up to get a nice fitting. Use a corner ruler or level to ensure the pipe is straight. Cut with hacksaw blade under the pipe.
Cut another piece of pipe that when sitting vertical in the coupling, extends above the motor at least 12” – 15” (you will trim this down later) and set into coupling. This will be your INTAKE PIPE. Make sure it is straight up and down (if not, you will have problems lining up the next coupling). Now you can cement the assembly.
Securing filter - It is up to you if you want to put the filter in a stationary position. If you do, wait until the entire filter with pipes is done. However, keep in mind that bolts can rust out and it will be difficult to take the filter off if you have to in the future. Typically, because of the weight of the full filter it is pretty secure.