Community Forums

MSHappyCampers · 05-13-2012, 07:19 PM

The 1/4" coiled air hose that I have with my MH takes FOREVER to air the tires to 100 lbs pressure, even with the coach pressure at 120 lbs. Today I bought a 3/8" hose at WalMart. Will the 50% increase in size air them up faster?

djbmsu · 05-13-2012, 07:55 PM

it will help some yes, it is the same as filling a 5 gal pail with water with a 1/2 in hose v/s a 3/4 in hose. just not much

Dik · 05-13-2012, 08:07 PM

Quote:

Originally Posted by MSHappyCampers

The 1/4" coiled air hose that I have with my MH takes FOREVER to air the tires to 100 lbs pressure, even with the coach pressure at 120 lbs. Today I bought a 3/8" hose at WalMart. Will the 50% increase in size air them up faster?

I don't believe volume will help with pressure. Try tapping into the air tank itself, this will give you the true pressure in your tank as it reads on gauge. Good luck...Dik

Coma · 05-13-2012, 08:13 PM

Get one of these.

336muffin · 05-13-2012, 08:28 PM

I buy a quality commercial double footed air chuck. I disassemble it and tap the two pieces that you put over the valve stem and tap it out with a fine thread tap creating internal threads that will "clip on" to the external threads on the valve stem. Thus holding itself on the valve stem. Being a old owner operator and checking 18 tires at a time weekly this is a time saver. Sometimes you can find one of these made commercial but the last time I tried the guy behind the counter said they were not available because of liability. I let a low tire air up while I'm checking the others with a gauge.

RickO · 05-13-2012, 08:37 PM

I'm not sure how the math works but I would sure think increasing your hose size by 50% would significantly reduce the time it takes to now air up. I believe the hose I carry is a 50' x 1/2". It takes no more than 5 to 10 seconds per pound to air up to the 95# I use.

Rick

W4MBG · 05-13-2012, 08:57 PM

20 pounds of differential aint much. 150 psi and a bigger hose will help a lot.

sc3283 · 05-13-2012, 11:07 PM

the larger ID hose will help somewhat. The valve stem is the major restriction, length of air hose is another drawback(longer=more psi drop)...when having PSI near what PSI your trying to obtain in the tire compounds the situation

Gary RVRoamer · 05-14-2012, 04:30 PM

How often do you add much air? Typically you would only be adding a few lbs to replace air loss, so the difference between a 1/4" or 3/8" hose would be negligible.

A larger hose helps only if the air source can deliver more volume. I gather you are using the coach's onboard air system, so what is the size of the hose that delivers air to the connector? Maybe 1/4"???? Most of the hoses in my coach are 1/4.

FormerBoater · 05-14-2012, 05:08 PM

Quote:

Originally Posted by Coma

Get one of these.

X2-quick, easy, light and easy to store.

Dave
1998 American Eagle 40EVS

distaff · 05-14-2012, 09:41 PM

Larger hose really won't matter. The size of the valve stem is much smaller than the hose, and frankly, you can push a lot of air through a small restriction - a tiny hole in your tire will empty it plenty fast.

Your issue is the differential in pressure, the pressure at your outlet from the coach is probably barely 110 psi - too close to the pressure in your tire. You need a high pressure pump. I carry a 150 psi Cable and Porter doughnut, some others have different solutions, but you need at least 20 psi difference, preferably more.

Arch Hoagland · 05-14-2012, 10:50 PM

I'm curious how often you have to add air and how much.

It's extremely rare, maybe once a year, that I have to add a pound or two to a couple tires.

Mr_D · 05-14-2012, 10:56 PM

Quote:

Originally Posted by distaff

Larger hose really won't matter. The size of the valve stem is much smaller than the hose, and frankly, you can push a lot of air through a small restriction - a tiny hole in your tire will empty it plenty fast.

Yep, I was amazed at how small and restricted my intake (after turbo) was on our ISC and yet it's plenty for the 35 psi output of the turbo.

Dutch Star Don · 05-15-2012, 12:33 AM

I have the same Sears pump as "Coma" and "Former Boater" and it works great. It's a 120volt unit and can be used at your campsite without having to air up the coach or leave it running. You can also use it on the road by running you generator. Between the built-in air hose and power cord, I can reach all four corners of my coach when plugged into the power in my storage bay.

This little compressor adds about 1 pound of air every 13-15 seconds and will easily go to 115 pounds. The chuck locks onto the tire so you don't have to hold onto it. The built-in gauge bounces around when the compressor is running, but it you can get pretty close with it. Once you turn it off, it's pretty accurate.

I use an old pillow case as a cover and then store it in my bay. Great compressor!