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Old 06-05-2016, 06:43 AM   #1
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12v air compressor

I am looking for suggestions on a 12v air compressor to mount in forward storage area of my 5er. Need 25 ft hose to reach all tires, Trailair hitch airbag and rear bags on my TV. Must be able to hit 150psi for Trailair bag inflation.

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Old 06-05-2016, 08:07 AM   #2
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Posts: 1,423 Viair 40047 400P-RV Automatic Portable Compressor Kit: Automotive

I recommend a longer cord and shorter hose and not permanently mount the compressor.

Too long of a hose can reduce pressure and flow:

Excessive pressure drop is the most common cause of complaints involving "loss of power" in portable air tools.

The most common causes of excessive pressure drop are restrictions to air flow in long lengths of small diameter pipes and hoses, in hose fittings, filters, lubricators, and especially in quick disconnect couplings

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Old 06-05-2016, 08:19 AM   #3
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Viair has a huge lineup of compressors. Check their website for helping pick one. Amazon sells them all.
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Old 06-05-2016, 08:25 AM   #4
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x2 on the Viair compressors. I have the 400P. Very quiet and can pump up to 150 psi according to Viair. Note that Viair recommends you connect the compressor to your TV's battery and have the engine running since they draw a fair bit of power so a permanent mount in your 5er may not be ideal. I bought a 50' hybrid 3/8" air hose for mine because the single coiled hose it came with just isn't long enough. If I were to order it again, I'd upgrade to the "RV" package that comes with an extension coiled hose and pockets for both hoses.
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Old 06-05-2016, 12:33 PM   #5
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I have a viair on board air system mounted on the TV. Runs air horns and I have an air chuck to plug in a 50' hose to fill truck and camper tires. Takes exactly 2 mins. to fill trailer tires from 16.5lbs to 60 lbs. per tire. I have to do it everytime we go on the beach. My only point is Viair makes a dependable product. My compressors are exposed to road dirt, mud, and everything else. They have worked great for 3 years now.
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Old 06-06-2016, 10:49 AM   #6
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Yet another vote for Viair. I have a 450P and use it with 50' of hose for my 125psi tires.

Learn To RV: Product Review: Viair 450P 12v air compressor
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Old 06-06-2016, 11:00 AM   #7
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Also to long of a wire ain't good . I would mount close to battery and buy a bigger diameter hose . Hot wires can cause fires , air restriction just waste time and cause wires to get even hotter .

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