Installing a washdown pump

jollymon

Petty Officer 1st Class
Joined
May 2, 2002
Messages
293
I am going to install a washdown pump on my 25' Crest Pontoon boat. I almost have the plumbing worked out, but I need ideas/suggestions for the electric.<br /><br />The pump will be about 6 feet (Wire distance) from the battery switch, about 2 feet from the battery and about 18 feet (again wire distance) from the helm. <br /><br />I have a start battery and a deep cycle battery, with a 1/2/both setting.<br /><br />The helm has #8 wire running to a fuse block. <br /><br />The pump has a demand switch so I can turn it on and leave it on, but I do not trust it, because if the plumbing leaks the pump will run until the battery dies.<br /><br />I am looking at three options:<br /><br />1. Run the wire from the pump, to the helm, install a switch, and back.<br /><br />2. Run a small wire from the helm, to a relay by the pump, and the pump to the battery switch.<br /><br />3. Run wire from the battery switch to a mechanical timer , by the pump. <br /><br />Option #1 is the easist to use with the least fault points, but that is a lot of wire, the pump draws 10 amps max.<br /><br />Option #2 again is easy to use, but how reliable is a relay, and I am not sure how to install it.<br /><br />Option #3 is easy to install, but a pain to use. <br /><br /><br />What would you do?? or how is it done on your boats?<br /><br />Thanks<br />Jollymon.
 

rwidman

Lieutenant
Joined
May 27, 2004
Messages
1,396
Re: Installing a washdown pump

# 1. Wire is not that expensive and is very reliable. ;) <br /><br />Be sure to install the proper sized fuse. Use marine grade wire, fuse, and fuse holder.
 

dingbat

Supreme Mariner
Joined
Nov 20, 2001
Messages
16,313
Re: Installing a washdown pump

I had a simialr situation with an on demand pump so I installed so I ran the hot wire (fused)off an output on the battery switch and installed an off-on switch in the battery box for the pump. That way the pump will run off which ever battery is currently in use yet I can turn if off if so desired. My circuit is about 12'in length total.
 

Bondo

Moderator
Staff member
Joined
Apr 17, 2002
Messages
71,082
Re: Installing a washdown pump

Why not from the fuse block to a switch to the pump to ground..............<br />14ga would easily carry it,.... run 12ga if you Think you need it for 10A............
 
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