I just closed my pool for the first time and have the skimmers and returns blown out and sealed. When I use my shop vac to blow out the main drain, as soon as I start the vacuum, I get bubbles out of the main drain for about 5 seconds. Then, no more bubbles come out no matter how long I leave the Vac on. I would think that it should continue to bubble if there is enough air pressure. I have just had it bubble for the 5 seconds and then closed the main drain valve. Is that good enough or do I need to see if a more powerful compressor is needed?
Minimal bubbles while air locking main drain
- Thread starter jb1183
- Start date
- May 3, 2007
- 16,938
- Pool Size
- 20000
- Surface
- Plaster
- Chlorine
- Salt Water Generator
- SWG Type
- Hayward Aqua Rite (T-15)
Welcome to the forum!
It could be the vacuum is not large enough for a full purge.
What is the make/model of the vac and how deep is the main drain?
It could be the vacuum is not large enough for a full purge.
What is the make/model of the vac and how deep is the main drain?
- May 3, 2007
- 16,938
- Pool Size
- 20000
- Surface
- Plaster
- Chlorine
- Salt Water Generator
- SWG Type
- Hayward Aqua Rite (T-15)
I was looking for a make/model so I can look up the specs. It should have both a CFM and pressure specification. The pressure needs to be above 4 PSI to fully clear the lines.
- May 3, 2007
- 16,938
- Pool Size
- 20000
- Surface
- Plaster
- Chlorine
- Salt Water Generator
- SWG Type
- Hayward Aqua Rite (T-15)
That has a sealed pressure of 68" which is a little over 5' water column. So not big enough.
Some members use this:
Some members use this: