The P-trap on our pool drain rusted through (cast iron). It lasted almost 40 years, not bad I guess. I would like to replace with 3” ABS and have a few questions.
1. I could buy a new 3” “Cast Iron” P-trap and replace. The Cast Iron is not as wide as the ABS, so this would be a quick and easy fix (see photo). The problem is I don’t like how the old cast iron “T” looks – where the P-trap connects. The Old “T” and P-trap has five Fernco fittings holding everything together. They worked well but look bad.
2. In order to install the 3” ABS I need to remove the Cast Iron “T” and use a Fernco fitting to connect a ABS “T” to the house sewer line to start the ABS pipe, then I will have the room I need. (An ABS P-trap is a lot wider than a Cast P-trap). Also, I will stay with the same set-up as in the photos but just use ABS and one Fernco fitting. The ABS P-trap will not fit in the desired space because the Cast Iron “T” side pipe sticks out to far.
I thought about coming out of the house sewer line with a 90 curve, but decide that they used a “T” so that it laid flat in the dirt so it would be more stable.
3. Also the cast iron drain stand has a split in the side. I will replace with a 3” ABS. This old cast iron pipe tapers from an opening of 5.75 inches to 3 inches. I can only find an ABS reducer from 4 inches to 3 inches. Do they make anything in ABS like the old Cast Iron one? Also can I find a drain grate to fit inside, to protect to sewer line.
Any input and guidance would be appreciated.