Closing help - Blowout advice

JT8Diesel

Gold Supporter
Sep 8, 2018
42
Barrie, ON, Canada
Pool Size
10000
Surface
Vinyl
Chlorine
Salt Water Generator
SWG Type
Pentair Intellichlor IC-20
I've attached a diagram of my pool.

Planning to close tomorrow. I've adjusted chemicals, brushed and vacuumed today, should be in good shape to close tomorrow for chemistry. I had a couple questions about blowing out the lines. Specifically the best way to clear the lines.

I have an Air Supply Cyclone blower.

Will the following plan work? Any better ideas?

  1. Shut down system, open air valve on top of filter.
  2. Open filter housing, remove filter media.
  3. Closer filter housing.
  4. Drain water from pool to below the skimmer (but above the returns).
  5. Connect cyclone blower to Skimmer
  6. Position first 3-way valve so that the system is blocked, and the skimmer is open to the main drain.
  7. Run blower until main drain is blowing air, close 3-way to airlock the main drain.
  8. Run the blower through the system from the skimmer to the waterfall feature
  9. Switch the return 3-way to now blow out main returns
  10. Plug returns with threaded plugs
  11. Cover and pray
Any better ideas?

Thanks

Screen Shot 2021-10-27 at 12.27.11 PM.png
 

ajw22

Gold Supporter
TFP Guide
Jul 21, 2013
29,831
Northern NJ
Pool Size
35000
Surface
Plaster
Chlorine
Salt Water Generator
SWG Type
Pentair Intellichlor IC-60
Blow from the pump to blow out your skimmers and main drain.

Remove your IC20 for access to blow out your return lines.

Winterize your Mastertemp following directions in the Pentair MasterTemp manual.

Remove the filter drain plug.

Remove the two drain plugs in your pump.

For more tips...

 

JT8Diesel

Gold Supporter
Sep 8, 2018
42
Barrie, ON, Canada
Pool Size
10000
Surface
Vinyl
Chlorine
Salt Water Generator
SWG Type
Pentair Intellichlor IC-20
Blow from the pump to blow out your skimmers and main drain.

Remove your IC20 for access to blow out your return lines.

Winterize your Mastertemp following directions in the Pentair MasterTemp manual.

Remove the filter drain plug.

Remove the two drain plugs in your pump.

For more tips...


When you say access the lines from the IC20, are you just holding the blower line in there, or do you have some kind of adapter to the union?

Sorry, I didn't specify, but yes, once all my "blowing" is done, I'll remove drain plugs, and do the master temp winterization as well.
 

ajw22

Gold Supporter
TFP Guide
Jul 21, 2013
29,831
Northern NJ
Pool Size
35000
Surface
Plaster
Chlorine
Salt Water Generator
SWG Type
Pentair Intellichlor IC-60
When you say access the lines from the IC20, are you just holding the blower line in there, or do you have some kind of adapter to the union?

Depending on the size of your pipes and the hose you have connected to the cyclone you should be able to hold the hose on the end of the pipe and blow into it.
 

ajw22

Gold Supporter
TFP Guide
Jul 21, 2013
29,831
Northern NJ
Pool Size
35000
Surface
Plaster
Chlorine
Salt Water Generator
SWG Type
Pentair Intellichlor IC-60
How does water get behind the liner?

The only thing keeping water from getting behind the liner is the pressure of the pool water holding the liner to the walls. We don't know your soil conditions or water table height and often neither do pool owners. Whether you have the problem depends on your local conditions.

Here is one member with the problem...

 

Darin

Well-known member
May 29, 2015
118
Muscatine/IA
Please see directions for Closing Pool on this web site.

Drain – Pump the water down till it is about four inches below the bottom of the returns. Usually I can do this with the regular pool pump, if the vacuum hose will allow the pump to stay primed. It usually works to setup a vacuum hose as if vacuuming so the pump can still draw water below the skimmer level. Some times too much air gets in and I lose prime, so I have to switch to the cover pump. If you have a main drain you can usually just use that and everything will go more easily.

I modified this to 6 to 8 which still gives me more that 18 inches of water in the shallow end. Still not sure how water gets behind liner if pool installed properly.
 

Newdude

Gold Supporter
TFP Guide
Jun 16, 2019
11,593
NY
I modified this to 6 to 8 which still gives me more that 18 inches of water in the shallow end. Still not sure how water gets behind liner if pool installed properly
It’s not the pool but the water table height and drainage of the surrounding yard, which varies from house to house. If the water table is higher than the level of the pool, it will seep under the pool wall and be forced up behind the liner. A big storm could do it as well once the ground was saturated if the top couple of feet was unable to drain further.
 

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Newdude

Gold Supporter
TFP Guide
Jun 16, 2019
11,593
NY
When you say access the lines from the IC20, are you just holding the blower line in there, or do you have some kind of adapter to the union?
I used duct tape to hold both my shop vac hose and leaf blower tube to the plumbing. (Depending on what I used that year) With a generous wrapping a little air whistled out with the powerful blower but most of it went the right direction. The shop vac wasn’t strong enough to whistle.
 
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