This is a new spa and is an owner/build. I have finally gotten the spa jet internals installed in my spa and the pressure is pitiful. The spa return line has more power than the jets. It is an 8' diameter spa with 6 jets. It has it's own 2.5 HP whisperflo pump. I checked online and found a spa schematic and it is plumbed like that one. It only has 2 PVC pipe going into/out of it. One is the spa drain,the other the spa jets. The spa is plumbed is 2.5" flex spa tubing and 2" PVC lines. I can feel the spa drain pulling strong. The jets do not have good power with or without the jet fittings in place. I have a blower but even with that the power is very weak. Are their values or anything that I need to move in order to get power from the jets. There are no valves on the spa pump or plumbing, and since it is seperate from the pool I can't think how it would help to move valves around on the rest of the pool. Any advice? I can post pics if that will help. Thank you as always for any help.