12 V Water Pump

Submitted: Wednesday, Feb 08, 2006 at 14:22
ThreadID: 30559 Views:1901 Replies:8 FollowUps:3
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Hi all,

Am fitting a 12v water pump to my CT and am unsure where to locate it. There are really only 2 options I have and they are under the trailer or on the back wall of the bay at the rear of the trailer where I have the gas bottle located.
Am I asking for trouble if I locate it in the same bay as the gas bottle.
The pump I have got is a Johnson.
Just thinking about possible but improbable gas leak plus spark.
Any advise would be appreciated.
Thanks
Howard.
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Reply By: flappa - Wednesday, Feb 08, 2006 at 14:34

Wednesday, Feb 08, 2006 at 14:34
I know a few of each. The ones underneath have a stone guard fitted over the top for protection.

Mine will be fitted near the Gas bottle. Mine is an open area , not a locker , so I personally dont have an huge concerns. My gas bottle is removed when camping.
AnswerID: 153843

Reply By: cokeaddict - Wednesday, Feb 08, 2006 at 14:38

Wednesday, Feb 08, 2006 at 14:38
Howard,
Im assuming the water tank is mounted under the frame. Personally, i would mount it as close to the tank as possible, reason for this would be distance. Less travelling distance before the water passes through the motor. Longer it takes for the water to pass through the motor means that the motor is revving its guts out sucking it in thus causing motor to cark it sooner than it should.
Thats just my 2 cents worth.
Ange
AnswerID: 153844

Reply By: Member -Dodger - Wednesday, Feb 08, 2006 at 15:42

Wednesday, Feb 08, 2006 at 15:42
If it is an inline pump place it as close as possible to the tank outlet with a filter before the pump to stop any solids or other from fowling the pump.
Just a simple filter that you buy for the garden sprinkler system would do.
Make sure you protect them from and flying stones etc.
To save water have a momentary switch that must be held in to operate the pump. That way one only gets the water that one needs and the pump cannot be left running and mt the tank.
I used to have a handle on life, but it broke.

Cheers Dodg.

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AnswerID: 153854

Reply By: Shaker - Wednesday, Feb 08, 2006 at 16:00

Wednesday, Feb 08, 2006 at 16:00
Remember, if you fit it near the gas bottle, that you are responsible for that installation .... forever!
So if the next, or subsequent owner/s get injured then you may well be held liable.
I think it would be foolish to locate it near electrical power, as already said, put it close to the tank, & if necessary fit a stone guard.
AnswerID: 153855

Reply By: dags666 - Wednesday, Feb 08, 2006 at 16:25

Wednesday, Feb 08, 2006 at 16:25
Howard I have just done my camper and I put mine in the box on the draw bar I have a aqua jet duo Johnson with a 2 litre suspension tank pumps 38 litres per minute which we run through a hws and to a sink and tap. these pumps are a bilge pump which are self priming mainly used for marine purposes .they are basic and take a fair bit of punishment but they do not like foreign mater getting under the seats so as suggested above put a filter on it . mate put it where you can fit it with out the pump getting damaged it will self prime .the only thing put a switch on the pump so you can turn it of when you are not using it ,for it will draw some amps as they will cut in and out while they maintain pressure. Even the smaller pumps get a bit savage on your batteries if left on dags
AnswerID: 153861

Reply By: scottp - Wednesday, Feb 08, 2006 at 18:49

Wednesday, Feb 08, 2006 at 18:49
is there any reason not to mount a submersable pump in the water tank?
AnswerID: 153890

Follow Up By: HJ60-2H - Wednesday, Feb 08, 2006 at 22:23

Wednesday, Feb 08, 2006 at 22:23
Yep, submersible in the tank. Well and truely protected, runs cool etc.
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FollowupID: 407857

Follow Up By: Howard T - Thursday, Feb 09, 2006 at 09:49

Thursday, Feb 09, 2006 at 09:49
Hi Scott

Had thought of submersible but then thought about cutting into the tank and problems it may cause later. So opted for and purchased the one I have now.
Regards
Howard.
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FollowupID: 407927

Reply By: Member - Oldplodder (QLD) - Thursday, Feb 09, 2006 at 09:34

Thursday, Feb 09, 2006 at 09:34
If mounted above the tank and near the gas bottle, is it a self priming pump?

Does it need mounting lower for priming?
AnswerID: 154023

Follow Up By: Howard T - Thursday, Feb 09, 2006 at 09:44

Thursday, Feb 09, 2006 at 09:44
Hi Oldplodder,

Yes the pump is self priming and completely enclosed. Probably should have added that where I want to mount it is not enclosed

Howard
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FollowupID: 407926

Reply By: Tim_N - Thursday, Feb 09, 2006 at 10:57

Thursday, Feb 09, 2006 at 10:57
All pressure pumps are not waterproof due to thermal overloads (the motor bodied expand and contract when they get warm with use). They must be mounted in the driest place possible. Also Johnson pumps are not US coastguard approved for spark, so I would not mount it near a gas bottle. Marine grade Flojet pumps are US coastguard approved though. All decent sized water pumps have a 2m head and can push/pull water up to 10 meters so you do not have to mount it right beside the tank etc
Tim
AnswerID: 154037

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