Nugget Posted July 9, 2012 Report Share Posted July 9, 2012 Hi all, I've recently bought a house that came with a non working hot tub, which I've been slowly getting up and running. It's a Coast Spas Bahama from 2003. I've gotten both motors running, pumps rebuilt, replaced a few cracked fittings in the service bay, and replaced a smoked pack. The problem I'm having now is that the primary pump seems to be pulling in air somewhere. I prime it and the filter, and it seems to run all right on low speed. But once I turn it to high speed, it momentarily builds up pressure, then stops. It will run for a few seconds more, then pressure will surge momentarily. This continues on and on. If i crack the bleeder on the filter, air is coming out whenever the pump isn't building water pressure. There are also several bubbles coming from the tub drain. Am I right in thinking the pump is taking on air somewhere? I don't have any experience with hot tub plumbing. I envision the suction side being the drain, tied to the skimmer and one of the suction fittings in the bottom of the tub, all meeting up in some sort of manifold and running to the pump. I don't know exactly where the ozonator injector is. I would think that I would have a pretty massive water leak if the drain was cracked or something. #2 pump seems to be working fine. Just thought I'd run it by you guys and get some opinions before I begin tearing into the foam. SWMBO is starting to get worried by how much of a project this is becoming. Thanks! Quote Link to comment Share on other sites More sharing options...
Dr. Spa Posted July 9, 2012 Report Share Posted July 9, 2012 There's not enough water in the spa and air is being drawn in through the skimmer. Quote Link to comment Share on other sites More sharing options...
Chas Posted July 9, 2012 Report Share Posted July 9, 2012 That's what I was going to say - rule out that, and a dirty filter first. Look to see if you can observe air being drawn in anywhere. HTH Quote Link to comment Share on other sites More sharing options...
Nugget Posted July 11, 2012 Author Report Share Posted July 11, 2012 Yup, topping her off did the trick. I guess I should stop assuming worst-case-scenario Thanks! Quote Link to comment Share on other sites More sharing options...
Chas Posted July 12, 2012 Report Share Posted July 12, 2012 We'll send you the bill. Oh wait! I meant: "glad we could help." Yeah, that's it. Glad we could help. Enjoy! Quote Link to comment Share on other sites More sharing options...
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