I hired a pool guy that had good references but he seemed lazy and sloppy. One day he quit talking to me and I found out he ran off on his wife and kids for some chick and left me with a lot of unfinished work and not much money left in my remodel budget. I finally got it all finished and had to redo a lot of things like the tile. I also removed my 1200 sq ft pool deck and coping overlay and replaced it with a new overlay. I hired another PB my neighbors used to do my plaster once I had it all prepped (took me about a year or so). I think he only took the job because he felt bad for me.
Anyway, the pool and spa look great but the raised spa was added on new onto my existing pool and I tried out the spa jets for the first time today and they were a dud. At speed 3 on the VS pump, only one jet put out any water (the lower jet he put in by the feet) and at speed 4 I got a couple more to put out water but very weak. It has 5 jets total that screw in and spin when the water is pumped through them. I was reading a lot online about a venturi tee for the spa and how most spas have a separate air line from the water line. I saw how the piping looked before the gunite went in and it looked like he plumbed it like regular pool jets with no air line. He also had the jets use what looks like a hartford loop where they come up and then turn back down. He said he did that to keep the water level in the spa from going down. He also ran 1.5" pipe from the pad rather than 2" to run all the way to the spa. The pad is about 50 feet from the spa and I think the smaller pipe is causing some of my problems.
I have a blower but it is still in the box. The first guy went back and forth about whether I needed one. I definitely do not have a venturi anywhere. The spa is currently plumbed like a pool with 5 returns and the pad just has a pipe to the spa jets and pipe back from the drains.
So my questions are:
1. Can I add a venturi at the pad or somewhere just before the return pipe enters the spa?
2. Should I replace the 1.5" pipe with 2" pipe up until I get to the spa?
3. Can I use the blower with the spa as described above if I have some way of injecting the air into the return pipe before it enters the spa to the 5 jets?