Cap for filter standpipe on all Hot Spring models. The grey cap is commonly used on the standpipe that holds the AG+ Cartridge.
The grey cap will fit on the other filters as well.
36513 Filter Standpipe Cap Grey is for the following models:
| Make | Model | Date Range |
| Hot Spring | Grandee | 1995-Current |
| Hot Spring | Vista | 2004-2013 |
| Hot Spring | Envoy | 2004-Current |
| Hot Spring | Vanguard | 2001-Current |
| Hot Spring | Grandee NXT | 2014-Current |
| Hot Spring | Envoy NXT | 2014-Current |
| Hot Spring | Jetsetter | 1995-Current |
| Hot Spring | Prodigy | 1995-Current |
| Hot Spring | Sovereign | 1995-Current |
| Hot Spring | Classic | 1995-2000 |
| Hot Spring | Accolade | 2005-2006 |
| Hot Spring | Landmark | 1997-2003 |
| Hot Spring | Summit | 1995-1996 |
| Hot Spring | Aria | 2007-2015 |
| Hot Spring | Highlife ILE | 2003 |
| Tiger River | Bengal | 1997-2010 |
| Tiger River | Siberian | 1997-2004 |
| Tiger River | Caspian | 2003-2010 |
| Tiger River | Sumatran | 1997-2010 |
| Tiger River | Bengal Model MM | 2005-2010 |
| Hot Spot | RLX | 1998 |
| Hot Spot | SLX | 1998 |
| Hot Spot | SX | 2011-Current |
| Hot Spot | TX | 2011-Current |
| Hot Spot | RE | 1998 |
| Hot Spot | SE | 1998 |
| Limelight | Bolt | 2012-Current |
| Limelight | Pulse | 2008-Current |
| Limelight | Gleam | 2013-Current |
| Limelight | Flair | 2008-Current |
| Limelight | Glow | 2008-Current |
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