I have a spa "jets" issue that I was hoping to get some help with.
I have a client with a pool/spa combo with a VSP. The jets (7 of them) are on the spa return manifold and are opened by a valve actuator. There is a cut "air" line (2" stand pipe with a wedge cut out) to mix with the spa jets, but has no air blower.
When the jets are turned on they only get about 6"-8" into the spa, and the air is mixing real well. As they continue to run the air mixture gets less and less until there is no more air, and only water returning.
I waited until the air stopped,but jets were still on. I then removed one nozzle and from that removed nozzle, that single line was working better than I've ever seen. Shooting out about 2 feet, with perfect air. The other 6 were just pushing less water flow, and no air.
I have adjusted the 2HP VSP from 2750 rpm's to both higher, and lower rpm's but the results are the same.
The current nozzles are 5/8" bayonet style with 1/4" openings
My questions are:
1. Is air getting backed up in the air channel because of too much back pressure?
2. Will switching to nozzles with larger openings allow the jets to push out further that 6" and not stop the air from mixing?
I thank you in advance for your responses and advice.