Shower pump drain does not pump out fully

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Nov 4, 2012
2
catalina 400 rock hall, md
On my 2005 Catalina $00 the aft shower does not fully pump out the water that remains in the recessed water colletion area. There is always about 20 ounces of water left. Any ideas besides drilling a hole in the liner to release the water into the bilge?
 
Feb 26, 2004
23,063
Catalina 34 224 Maple Bay, BC, Canada
Make sure your check valve is operating properly. sometimes hair gets into it and clogs it so it doesn't stop the backflow Bill mentioned. The old flat black Shurflo check valves that Catalina used (at least on my boat) may not be available anymore. I replaced mine with a 3/4" Raritan RV1.

Pictures of both are here (read both pages) http://c34.org/bbs/index.php/topic,4114.0.html
 
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