ive got air under my lid (JVX300 pump) all plugs are closed tightly on the pump, my buddy had it as a spare so I swapped my pump off to eliminate pump as the possible issue running my in ground pool (40'x20') its the size of the lid viewing window, I've changed all 3 seals (2 smaller on shaft and 1 bigger with lube) on all my valves along with put water on all joints and no change. I've got 2 suction returns on the floor in the deep end and 1 skimmer also on the deep end wall. I pulled the basket and some part that sits on bottom of the inside of the skimmer and see 2 holes (closest hole to the water I didn't feel any pressure assuming that's coming from the 2 floor returns (learned that on this nice site!) and the hole behind it I felt a VERY strong vacuum with the JVX300 on high. I have a dedicated line for floor vacuum so I left the vacuums line connected and pulled the MX8 Elite vacuum off the end leaving the hose open in water and switching the valve to full vacuum mode only (cutting off skimmer and apparently attached twin floor returns) and no change in pressure on filter gauge and no change in bubble size bigger or smaller. I wanted to see if anyone had any other idea I haven't thought of before building a manifold and pressure testing my lines to absolutely verify I've got no underground issues. is there an acceptable bubble size that means no issue? I've read over all the dreaded typical bubble threads that all say there is a leak on the suction side. I've cleaned my filter (Jandy DEV 60 Sq. Ft. DE Filter) as in actually opened and sprayed the grids and refilled with the 7lbs of D.E. making sure grids where broken as well. lubed ALL o-rings in the entire system. am I missing something before I build a pressure tester to test lines underground?
classic pump lid bubble
- Thread starter aquam4n
- Start date
- Jul 21, 2013
- 54,168
- Pool Size
- 35000
- Surface
- Plaster
- Chlorine
- Salt Water Generator
- SWG Type
- Pentair Intellichlor IC-60
Welcome to TFP.
What RPM are you running your Jacuzzi JVX300 3.0 THP Variable Speed Pool Pump?
How does the bubble change when you run it at different RPMS?
Is the bubble in your pump basket causing any problems in your filter or returns?
What RPM are you running your Jacuzzi JVX300 3.0 THP Variable Speed Pool Pump?
How does the bubble change when you run it at different RPMS?
Is the bubble in your pump basket causing any problems in your filter or returns?
I pressed high, I think it was 3500? i cant remember exact # honestly until I get back to the pump later. I don't think so to my knowledge about problems in filter or return? my worry came from threads on here about suction leaks. just curious what else would cause it? ill have to check the lower speeds when I have time to play with it. I don't remember lowering speed when I last played with it. if I knew nothing about pools it wouldent have phased me but after learning there should be no bubble unless suction leak i'm digging into it.
- Jul 21, 2013
- 54,168
- Pool Size
- 35000
- Surface
- Plaster
- Chlorine
- Salt Water Generator
- SWG Type
- Pentair Intellichlor IC-60
Variable speed pumps are different and will often develop a bubble at certain speeds.
3500 rpm is probably too fast for your plumbing pipe size to supply water. Try around 2000 rpm.
3500 rpm is probably too fast for your plumbing pipe size to supply water. Try around 2000 rpm.
that makes sense, start low hopefully with no bubble if I can get rid of it and increase to find proper flow which i'm guessing ill develop a bubble due to velocity being too high, once I find my max I can use that for robot or whatever and make that my threshold if I'm following correctly?
- Jul 21, 2013
- 54,168
- Pool Size
- 35000
- Surface
- Plaster
- Chlorine
- Salt Water Generator
- SWG Type
- Pentair Intellichlor IC-60
Hey aquaman !!! Does the bubble grow to where it starts to drain the basket ? I ask because mine forever had a bubble that varied from a quarter cup to a full cup in size. The edges of the dome were always wet with no air but the middle of the dome may or may not have been wet.
Long pre-TFP I never knew about suction side leaks and asked the PB if it was ok. He told me it was fine and to call him if it ever got more than just a bubble. Me and my bubble became friends. I’d waltz out there for whatever adjustment, greet my little friend, pet the SWG and go about my way.
Our mentality has changed drastically since I built my pool 8 years ago. Now we pull out the phone and Google any last little thought and a lot of times it sends you down a rabbit hole (WebMD said the bubble was cancer).
So I’m not saying there is no worry here at all, but maybe it’s just the normal bubble.
Long pre-TFP I never knew about suction side leaks and asked the PB if it was ok. He told me it was fine and to call him if it ever got more than just a bubble. Me and my bubble became friends. I’d waltz out there for whatever adjustment, greet my little friend, pet the SWG and go about my way.
Our mentality has changed drastically since I built my pool 8 years ago. Now we pull out the phone and Google any last little thought and a lot of times it sends you down a rabbit hole (WebMD said the bubble was cancer).
So I’m not saying there is no worry here at all, but maybe it’s just the normal bubble.
ive got to thinking I used to have a Jandy SHPF2.0 i believe it is? not near it but I know its a 2.0HP and it had a bubble so going to factor in the speed as previously stated but its not a VS pump so i'm lost.
Newdude I think this weekend I'm going to find some free time and mockup a pressure manifold tester and shoot my lines just to eliminate that factor because maybe I do have a much bigger issue on hand.
Newdude I think this weekend I'm going to find some free time and mockup a pressure manifold tester and shoot my lines just to eliminate that factor because maybe I do have a much bigger issue on hand.
Always better to know than not know. I was just making sure you had fair reason to expect further experiments
I was just reading another thread that I think just answered another question I didn't know I had but have now, pools have a reserve line? I did not know that but I do know I have a line sticking up by my filter quite a bit out of the pad that's capped off, I'm now assuming that's what that is?
where is that likely attached to? if so
where is that likely attached to? if so
- Jul 21, 2013
- 54,168
- Pool Size
- 35000
- Surface
- Plaster
- Chlorine
- Salt Water Generator
- SWG Type
- Pentair Intellichlor IC-60
What are the two holes in the skimmer
I have a skimmer with two holes in the bottom. One I know is the regular suction to the filter, but what is the other one for. The problem is that a rock dropped into that hole. I can see the rock and can partially get some screwdrivers on each side but can't get it out. So actually I have two...
www.troublefreepool.com
very last post by "waste" I've got described pipe sticking up about 4" by my filter capped off, never thought about it until I just read that
glad I could contribute lol!
Im going to use an adaptor and throw very very low air pressure at it and see if I can see bubbles at the skimmer and or elsewhere and try to identify it
- Jul 21, 2013
- 54,168
- Pool Size
- 35000
- Surface
- Plaster
- Chlorine
- Salt Water Generator
- SWG Type
- Pentair Intellichlor IC-60
What are the two holes in the skimmer
I have a skimmer with two holes in the bottom. One I know is the regular suction to the filter, but what is the other one for. The problem is that a rock dropped into that hole. I can see the rock and can partially get some screwdrivers on each side but can't get it out. So actually I have two...
very last post by "waste" I've got described pipe sticking up about 4" by my filter capped off, never thought about it until I just read that
He was just describing an extra line run from the equipment pad to the pool for future needs.
No telling what the pipe you have capped off was for or where it runs. You can remove the cap and blow air into the pipe and see if you see any bubbles or hear the air. The pipe could be for a cleaner or a drain or an extra run that was installed and never used.
So I shot some air through the capped off pipe and figured out that its attached to the 2 returns on the side of the pool not the 2 on the bottom. Any advantage to plumbing them in? So 4 returns and a skimmer on a VSP JVX300 pump?
I would think a few good pictures of the equipment pad can help us possibly identify more potential trouble spot such as valves.....
Valves are all re-oringed with lube, im wondering if piping in the 2 side returns that were capped off would help any?
Attachments
- Jul 21, 2013
- 54,168
- Pool Size
- 35000
- Surface
- Plaster
- Chlorine
- Salt Water Generator
- SWG Type
- Pentair Intellichlor IC-60
The 2 on the floor are your main drain.
The 2 on the side are suction ports. They are designed to take water in, not be returns. Looks like the plan was a second pump for some water features and that was the suction line.