problem with spa

OK -- good info. However, those are not spa jet nozzles. They are return nozzles for the regular pool.
 
That is the difficult question. Can you drain enough of the spa to get a look at the jet body?
 
Look at the site I linked. There is a pic of a jet body.
Thought I would report back on this as it is finally solved. After over a year of troubleshooting and 4 pool companies telling me to just add a blower, one fellow came out and listened to the symptoms and said a check valve was broken. Sure enough the check valve right after the heater was broken and the flapper inside was floating freely and sealing up the outlet to the valve. A new valve and it’s all fixed! I very much appreciate all the help!
 

Attachments

  • 625B691D-7EE8-40F0-A565-FEB2BD9593F5.jpeg
    625B691D-7EE8-40F0-A565-FEB2BD9593F5.jpeg
    258.5 KB · Views: 10
  • ADE0231D-6FF0-409C-8E2C-BD7AACF06926.jpeg
    ADE0231D-6FF0-409C-8E2C-BD7AACF06926.jpeg
    538.1 KB · Views: 10
Great to hear you had it fixed!

Your first diagram did not show a check valve. What is the function of that check valve?
 
I didn’t know that was a check valve. I just thought it was part of the piping. I’ll need to update my diagram for my future reference. I’m still trying to learn how the whole system works. My understanding is the check valve prevents water from flowing backwards into the heater. Why that is needed I’m not sure. But that explains why the whole filter system was being pressurized.
 

Enjoying this content?

Support TFP with a donation.

Give Support
Your diagram shows a SWCG. So as Brian points out, that check valve is not needed. Be prepared to remove it if you have issues again.
 
Low pH is a threat to your heater. The very slight increase in FC coming from the SWCG is not.
 
Thread Status
Hello , This thread has been inactive for over 60 days. New postings here are unlikely to be seen or responded to by other members. For better visibility, consider Starting A New Thread.