What is this drain and how do I clean it out?
- Thread starter thumendoza
- Start date
- Jun 22, 2014
- 52,090
- Pool Size
- 17888
- Surface
- Fiberglass
- Chlorine
- Salt Water Generator
- SWG Type
- CircuPool RJ-45 Plus
Welcome to TFP! 
Can you post another pic or two from a bit farther back so we can everything better please?
Can you post another pic or two from a bit farther back so we can everything better please?Welcome to TFP!
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When I turn my backwash valve, I see water flowing. So would this be the backwash drain?
- Jun 22, 2014
- 52,090
- Pool Size
- 17888
- Surface
- Fiberglass
- Chlorine
- Salt Water Generator
- SWG Type
- CircuPool RJ-45 Plus
Old Purex filter after Pentair bought them. SMBW 4000 series. That is the sight glass that allows you to see the backwash water so that you know when you are done with the backwash (it will go from brownish to white). You could drain some water from the pool that way (not recommended) but would have to add DE back to the filter each time.
- Jun 22, 2014
- 52,090
- Pool Size
- 17888
- Surface
- Fiberglass
- Chlorine
- Salt Water Generator
- SWG Type
- CircuPool RJ-45 Plus
It looks to be a Pentair color, so that would be in the 1990s. Was made by Purex (the same people that made laundry bleach) before that. Same model numbers, essentially, carried over but Pentair put the filter in a fiberglass tank.
You needed special tools to work on those filters, so despite loving tools, I never purchased any (expensive) because there were so few in use in my area. I just referred a customer to ones who did work on them.
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I have no idea. You have to follow the waterflow or the pipe. In your area it may have been code to have it go to the sanitary drain.