Water Pump Noise

Sailgunner

Sailgunner

.
Jun 4, 2004
1,087
Mainship Piliot 34 Punta Gorda
Posted this in Cruising Forum but may get more responses here.
Has anyone figured out how to reduce the fresh water pump noise? These things are fastened to the hull and vibrate throughout the boat. They have rubber bases but they don't do much.
 
C

Calif. Ted

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Jun 8, 2004
2,958
Catalina 320 Dana Point
Maybe one of those sound absorbing mats used in auto stereo installation. I have had the excessive noise alert me to an empty tank while underway.
 
M

MitchM

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Jan 20, 2005
1,031
Nauticat 321 pilothouse 32 Erie PA
you could blanket the pumps compartment with the sound - reduction foil back stuff which they put in engine compartments...
 
kloudie1

kloudie1

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Nov 6, 2006
10,104
Hunter 34 Mandeville Louisiana
Check the feet and mounts to insure that the feet still have resilience and aren't tightened too much.. make sure there is nothing of the pump or its base touching any fiberglass or solid parts of boat.. You should be able to easily wiggle the pump about 3/8" .. ohh yeah. check that the piping to/from the pump is not bound up and hitting boat parts within about 2 feet of the pump. I am assuming the pump is not one of those old "machine gun" single diaphragm pumps.. If so change it out to a new three or four diaphragm "rotary" type pump.
 
Franklin

Franklin

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Jul 20, 2005
2,422
Whitby 55 Kemah, Tx
I put a mouse pad or two between it and the hull. It works for a while but then wears out and the noise is back.
 
Ron20324

Ron20324

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Jan 22, 2008
8,050
Beneteau 323 Annapolis MD
I mounted my deck washdown pump by attaching a piece of rubber hose (1.25?) to the mounting board, then nut and bolted the pump to the hose. It's a big isolation block in effect. It worked so well I am going to remount the 2 OEM pumps.
 
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