When I set up the plumbing, I had them put in this tee with a hose bib so I could lower the water level in the Swim Clear filter when it was time to change out the cartridges. I now want to use this as a way to add make-up water to the pool. It usually requires an inch or two once a week. It's between the pump and the filter. I can attach my hose to it from a nearby sink. Does anyone see any problems with this? What I do now is run the hose out to the pool and fill it that way. I don't like doing this when there are people using the pool. To me it might be OK, but I don't want to do it if it might cause a problem downstream. The heater is next in line downstream from the filter.