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tkranz

New York

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Posted: 03/30/12 11:17am

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OP here.

Dutch refers to "ZIP" extenders, which I had heard of. part of my post question is, are all or most extenders "zero internal pressure" with the core wire transferrinf pressure from the outer end, or are many extenders full internal pressure with the valve at the tire end open all the time the extender is installed?

sailor_lou

Connecticut

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Posted: 03/30/12 11:33am

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To answer your question, many extenders have the full tire pressure within them and the valve at the end of the extender maintains the seal. On my previous MOHO, I had a braided stainless steel set designed that way (purchased from NAPA) and had no problems with them the 4 years I owned the motorhome. My current rig has solid valve stems that are routed through the outside rim.

Lou
05 Travel Supreme Envoy

* This post was edited 03/30/12 11:40am by sailor_lou *

Sully2

Cincinnati

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Posted: 03/30/12 12:13pm

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Executive wrote:

When you screw the braided end onto your valve stem, it depresses the valve core in the valve stem opening it up so air flows to the other end of the braided line. If you unscrew the braided extension you will lose very little air as the valve core in the valve stem will close....Dennis

Absolutely CORRECTO!!!

2000 Country Coach Allure; Cummins ISC 330 HP; 71/2 - 8 MPG regardless
2002 Jeep Liberty

Sully2

Cincinnati

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Posted: 03/30/12 12:15pm

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BobR wrote:

I have the braided valve extenders supplied by Winnebago when built 21 years ago. I've never had a problem with them.

Ive had 3 different sets on 3 different coaches...havent had any problems since 1994

Clay L

Sioux Falls, South Dakota

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Posted: 03/30/12 12:16pm

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I don't know what the proportion of ZIP extensions to the kind with pressure is. The ZIP type are more expensive and are what I had on my last motor home.

I adjusted them per the instructions, but the first trip with them cost me a tire. Apparently heat caused the wire/cable inside to expand, pushing on the valve stem and allowing air into the extension. You wouldn't think that would be a problem since there was a valve cap that should a have prevented air from escaping but it leaked anyway.

My present coach came with the other braided type and they worked okay for seven years but I was always wondering if they would fail. It was also hard to hold an air chuck on them while holding the extension so the chuck could get air in. I also had to put some tubing on them to keep them from wearing on the spring retainers that held them in the cutout

When I replaced my tires in October of 2010 I had Dually Valve solid extensions installed in place of the existing valve stems and did away with the braided ones.
They make it very easy to add air and come out far enough for my PressurePro sensors.

I wish now I hadn't waited so long to install them.

Clay (WA5NMR), Lee (Wife), Katie (cat).

Full Timing in a 2004 Winnebago Sightseer 35N, Workhorse chassis, Honda Accord toad

Roadglider09

Florida

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Posted: 03/31/12 07:31am

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I guess it's a matter of preference. I had them on my coach and twice the spot welded mounting bracket broke, so the braided hose was flailing all over and scratched my rims. I also had multiple leaks at the valve. At my last tire replacement I had the dealer remove them and install brass valve extensions with gator caps. Gators caps are a fancy valve cap that allows you to check pressure and add air without removing the valve cap. Very cool, and no more braided hoses waving around as I roll down the road.

Michael & Donna
Little Ones Becky & Karen
Deland, FL
98 Monaco Dynasty
2013 Wrangler Unlimited Toad
Couple of Harleys (when not pulling the Jeep!)

Dutch_12078

Great Sacandaga Lake, NY

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Posted: 03/31/12 01:00pm

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wa8yxm wrote:

Personally I'd rather go with Duly Valves, or a crossifre system (I actually HAVE the crossifire but am unable to install it on my RV due to physical limits (The hole is too small for my hand)

But. that said.. I have seen all the dire warnings from others.

I've also seen a whole lot of semi trucks using them.

Are Crossfire braided hoses more reliable than braided extender hoses?

Dutch
1995 Coachmen Catalina 322QBXL
F53 chassis, 460 V8, TST TPMS
Quadra Bigfoot EZE Levelers
2011 Toyota RAV4 4WD/Remco pump
ReadyBrute Elite tow bar/Blue Ox baseplate

wny_pat

Western NYS

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Posted: 03/31/12 02:59pm

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Dutch_12078 wrote:

wa8yxm wrote:

Are Crossfire braided hoses more reliable than braided extender hoses?

My son will tell you no - he had a tire with the crossfire go flat and it allowed the other to go. Now they are not suppose to do that.

But the braided hoses, can't you put them thru the hole and reach behind the tire, between the two and reach up and thread it on? I can't reach thru my two inch holes either and that is what I do.