Not sure if this is exactly the right place - parts would also work in the SWG area, and others would be better in the Pumping station, but overall it's a plumbing renovation... Should I split up the question?
As I have mentioned in the past, I'm a paraplegic due to a spinal cord injury about 3 years ago... We have gotten a lift to get me in and out of our in-ground pool, and I find swimming is good exercise for me...
However I've found that it is difficult for me to do the day-to-day pool chemistry testing and maintenance, particularly keeping up with chlorine additions.... I would like to see how much of the chemistry stuff I can automate, even though I know I can't totally avoid it... Seems like this means an SWG is the way to go.
In addition, our existing DE filter is a very old and obsolete model that is hard to get parts for, and has gotten very stiff to operate the backwash valve - at the very least it is likely to need new grids soon, it blew out several last season, which I replaced with old ones from a prior replacement, but I don't expect them to last...
Pool and existing equipment is described in my sig, but it's about 16-17Kgal, with one skimmer, three returns that appear to be plumbed in series, no other features, besides the Polaris pool cleaner and booster pump... All the existing plumbing is 1.5" and I don't see us replacing anything other than what is needed around the equipment area for dealing with changes to the system.
The existing 1HP pump is in good shape - no real reason to change it if not needed (I think)
So we need to replace the filter, and add an SWG. Cost is an issue, though we are willing to pay more for significantly better quality...
I'm thinking that a sand filter would be the best overall match for us than a DE - but how do I determine size? I know that oversizing can be good on a DE filter, but what about a sand unit? Also any advice on brands / models that are particularly good (or bad)?
Same question more or less on the SWG - I did see one post suggesting oversizing by 1.5-3X, what benefits does this offer? Does it make the cell life enough longer to justify the increased cost of replacement cells? I noticed in the place that does cell rebuilding that there seems to be just one series of cells that fits multiple brands of SWG, so what is the best way to decide which brand to get?
Also - a question on the electrical wiring - currently we have two 110V circuits to the pool equipment, one for the main pump and one for the Polaris pump. Both are controlled by time switches in our basement (which I can't get to) and a manual on/off switch at the pump area that can turn the pumps off if the timer has them on... (installed before I got hurt to avoid needing to run down to the basement to play with the manual switch on the timers) Can (per code) the SWG be connected to one of those circuits, or will I need to figure out how to run a third circuit for it?
Any other comments / suggestions / stuff I need to ask?