A fuel hose is a reinforced rubber hose in a vehicle that carries the fuel from a fuel tank to a different part of the vehicle, usually the fuel pump. Fuel hoses come in many different sizes and are used in a variety of different vehicles, from lawn mowers to farm tractors to cars and trucks. There are a few different things to consider when selecting a fuel hose. Virtually everything you need to know will be stamped on the hose itself. However, the first thing you should always do before buying parts is look at your vehicle&#;s owner&#;s manual.
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Not all fuel line hoses can handle every kind of fuel that&#;s out there today. Make sure that the fuel hose you&#;re buying is suitable for the type or types of fuel you&#;re planning to run through it. If you&#;re using diesel, use a fuel line marked &#;diesel.&#; If you&#;re using a high-ethanol fuel, make sure the hose can handle alcohol blended fuels.
When you&#;re looking for a fuel line hose, what you&#;re planning to use it in makes all the difference. A lawn mower fuel line hose and a fuel injection hose may look the same, but they are worlds apart. A fuel injected engine runs at a much higher fuel pressure than a carbureted one does. So, if your vehicle is fuel injected, you need fuel injection hose.
If you have a vehicle manufactured before , a small engine like a lawn tractor or generator, or any other kind of engine with a carburetor, you can use standard fuel hose.
Will the hose be connected to a fuel pump that&#;s inside the gas tank? If so, you&#;ll need a submersible hose. If you install a standard fuel line hose on a submersed fuel pump, the fuel will eventually start to break it down. This will cause bits and pieces of the hose to come off and float in your fuel. These bits can be sucked into your fuel pump and clog it. Submersible in-tank fuel line is designed to resist breaking down if it&#;s submersed in fuel.
There are strict government fuel hose emissions regulations that you must follow when you replace fuel line hose. It&#;s always safest to go by the strictest regulations so your vehicle or boat will be legal wherever you use it.
The state of California has some of the strictest emissions regulations in the country. Fuel hose that meets their requirements is marked with the letters &#;CARB&#; (California Air Resources Board). Use a CARB-certified fuel hose whenever possible as it resists seepage better than a non-CARB approved hose. This means that you will have better fuel economy with a CARB hose.
If so, you&#;ll want to use vacuum tubing instead of a fuel hose. Vacuum tubing is specially designed to stay flexible even at low temperatures and is ideal for replacing tubing on windshield washers.
The United States Coast Guard has requirements for fuel hose to be fire resistant. Hose that meets these requirements will have the letters &#;USCG&#; stamped on it. Try to use USCG-marked hose for any marine application. This type of hose is usually labeled &#;marine fuel hose&#; on its packaging.
For more vehicle guides and how-to&#;s, check out Blain&#;s Farm & Fleet&#;s Automotive blog.
If you were to ask a group of boaters which type of marine hardware causes the worst case of sticker shock, most of them would probably think of electronics or engine parts. Well, they&#;d be wrong. In my 10-plus year career in working with marine supplies, it wasn&#;t a new radar system or engine thermostat that made my customers feel as if their wallets were spontaneously combusting. Nope, it was boat hose.
Imagine pulling a three- or four-foot section of one-inch engine water intake hose out of your boat and then taking it to your local marine shop for a match. Next, imagine nearly $30 vanishing from your back pocket. While per-foot hose pricing can take your breath away, don&#;t let it tempt you into skimping or misplacing frugality. When it comes to boats, selecting and installing the right hose for the job is absolutely essential to system functionality, as well as safety. Let&#;s take a look at the types you&#;ll likely encounter.
Pro tip: When measuring for hose, always find out what the inside diameter (ID) of the hose you&#;re replacing is, not the outside diameter (OD).
Sanitation Hose
If you&#;ve been on a lot of boats with toilets that have been in service for more than a couple of seasons, you know &#;that smell.&#; It&#;s very common, and can be hard to prevent and hard to eliminate. Aside from tedious head maintenance, the best way to help keep those odors at bay is by using the proper sanitation hose, which is engineered to not absorb odiferous effluent.
Unfortunately, this hose comes with that aforementioned sticker shock. Be prepared to spend as much as $10 a foot for the good wire-reinforced vulcanized rubber stuff (comes in black and white). And be sure it is classified as &#;sanitation hose&#; on the outside. It&#;s generally sold in 1-1/2-inch diameter, but can also be found in 3/4- and one-inch sizes for use with macerator pumps.
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You will also likely find white PVC sanitation hose with stiff, somewhat inflexible characteristics. Yes, it will certainly look better where it is exposed in head compartments, and it is cheaper than the &#;black stuff,&#; but it does not resist odors nearly as well in the long run.
Uses: Head discharges, holding tank lines, macerator pumps, and vented loops.
Raw Water/Exhaust Hose
Typically among the most expensive hose you&#;ll find in any marine supply shop, exhaust hose is usually comprised of several layers of tough, cloth-reinforced, vulcanized rubber with a stiff length of wire running through it. It&#;s designed to make bends without collapsing, and it&#;s extremely abrasion- and heat-resistant, making it an ideal candidate for connections to through-hulls under the waterline, and for carrying hot exhaust gases and cooling water overboard.
Some exhaust hose has no wire reinforcement, especially the big stuff over four inches in diameter. That&#;s because larger exhaust line runs don&#;t usually encounter any bends.
Uses: Raw water engine intakes, hot water exhaust, raw water intakes for heads, washdown pumps, or other bits of plumbing that connect to a below-the-waterline through-hull.
Potable Water Hose
This stuff doesn&#;t usually fall into the &#;sticker shock&#; category, but it&#;s an area where boaters often are tempted to use the wrong stuff, such as clear PVC hose. Proper water hose is reinforced with nylon threads to not only strengthen it against the pressure of fresh and raw water systems, but also to help prevent it from collapsing on the suction side of pumps. If you want to really show an attention to detail, use hose with a red tracer for hot feeds, and with blue for cold feeds. Also, look for &#;FDA Approved&#; in the specifications.
Uses: Freshwater systems (manual and pressurized), raw-water washdown systems (above the waterline connections), water tank vents, ice box drains, scupper drains (above the waterline), and more. A good general-purpose hose.
Fuel Hose
Fuel hose can be confusing, and that&#;s mainly because of all the different classifications it is sold under. What you&#;ll usually find are types A1, A2, B1, and B2. Generally speaking, A-type hose has a thicker wall than B-type hoses, and must also not leak during a two-and a-half-minute fire. The number classifications in those letter ratings (e.g. &#;A1&#;) refer to the permeability of the hose. Type A1 hose, for example, will be less permeable to fuel than Type A2.
If you&#;re working with gasoline, it&#;s really difficult for me to recommend anything but Type A1, and I don&#;t think I ever sold a foot of B1 or B2 hose to anyone for this purpose, except for fuel tank vent lines. Diesel fuel is obviously less volatile, but that never stopped me from encouraging my customers to go with A1 hose for those applications.
Uses: Engine fuel feeds, fuel fill lines, fuel tank lines, and fuel vents.
Bilge Hose
Bilge hose is designed to work with bilge pumps, as the name suggests. What usually sets bilge pump hose apart from other hoses is its flexibility. This is an advantage, since bilge pump discharge lines are often weaved and routed through some tight areas. In fact some bilge hose is sold under the trade name, &#;bilge flex.&#;
But I wouldn&#;t use it. This corrugated (ridged) hose is certainly flexible, but it also is cheap and flimsy. It&#;s a dirt and grime magnet, too, thanks to all the tiny ridges in its surface. Those ridges also create friction inside the hose, which reduces the efficiency of your bilge pump.
For bilge pumps I like smooth-walled, white PVC hose with nylon reinforcement. It&#;s much more durable, and with a smooth exterior, it doesn&#;t attract fuel, oil, dirt, or any of the other nasty stuff in your bilge. It&#;s also smooth-walled inside, which means its effect on pump efficiency is minimal. It&#;s unfortunately not as flexible as other bilge pump hose, and may require some work to route through your boat.
Uses: Bilge pump pickups and discharges.
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