The process of preparing the boat for the water is a fundamental stage of any fishing or water trip. Many beginners underestimate the importance of proper pumping, considering it a simple mechanical procedure that does not require special knowledge. PVC boatsResilience on the wave and most importantly, your personal safety on the water.
Incorrect pressure in cylinders can lead to deformation of the bottom, rupture of seams or loss of stability of the vessel at the most inopportune moment. In this article, we will discuss in detail how to pump a boat with regard to temperature conditions, equipment selection and technical specifications of materials. pressure 0.2 of the atmosphere can be critically small, and 0.35 can be dangerous in heat.
Selecting the right pump for pumping
The first step to successfully preparing a boat is to choose the right equipment. The market offers many solutions, from simple foot furs to powerful electric compressors, and the choice depends on your priorities: mobility or speed. foot-pumpIt is lightweight and does not require a power source, making it ideal for long-distance hikes.
But if you own a large boat with a hard transom or an inflatable keel, the physical effort can be enormous, and in these cases, electric pumps become not just a convenience, but a necessity, and they allow you to quickly create base pressure, and then you can manually bring the cylinders to condition. maximum working pressureThe pump is capable of creating a pump, as cheap models often suffocate after 0.15 atm.
There are several main types of devices, each of which has its own advantages:
- 🚲 Foot pump. - classic genre, reliable, not afraid of water, allows you to control the process with your feet, leaving your hands free.
- ⚡ Electric compressor - runs on a 12V battery or network, ideal for rapid pumping of large volumes of air.
- 🤲 Manual piston pump compact, but requires considerable physical effort and often comes in the basic configuration.
- 🔋 Battery pump It is fully autonomous, convenient, but has a limited operating time from one charge.
When choosing an electric unit, pay attention to the presence of a function shutdown This will save you from accidentally pumping the boat on a hot day when the PVC material becomes more elastic, and it is also worth checking the package with adapters, since valves from different manufacturers may differ.
Preparation of the seat and boat for the procedure
Before you start pumping, you need to properly prepare the site, the ideal option is a flat surface, cleared of objects, branches, stones and debris, even a small knot or sharp stone can damage the PVC tissue when the cylinders stretch, which will lead to unpleasant repairs in the future.
Spread the boat completely, straighten all the folds and make sure the valves are in a closed position before starting work. If you pump the boat in the sun, try to minimize the exposure time of the empty boat in direct beams, as the dark color of the material heats up quickly. Temperature expansion The air inside the cylinders is a physical law that cannot be ignored.
⚠️ Warning: Never leave a partially or fully pumped boat unattended in direct sunlight. The pressure inside the cylinders can rise to critical values in minutes, causing the seams to rupture.
Check the valves' integrity and make sure they don't get dirt or sand. A dirty valve won't keep it tight, and air will come out even when the lid is closed. Wipe the area around the valve with dry rags before connecting the pump hose.
Pumping technology and sequence of actions
There is a certain sequence of pumping cylinders, which should be followed to preserve the geometry of the boat and the uniform tension of the seams. Usually the process begins with the nose cylinder, then proceeds to the aft, and only lastly pumped the sides and inflatable keel (if any), this sequence allows the boat to "sit" correctly in place.
Use a pressure gauge. It is difficult to visually determine the correct pressure, especially for a beginner. The standard operating pressure for most PVC boats is between 0.2 and 0.25 atmospheres (or 200-250 mbar). For an inflatable keel, the pressure can be higher, up to 0.3-0.35 atmospheres, which gives the bottom rigidity and hydrodynamic properties.
☑️ Checklist of proper pumping
When pumping, check the symmetry of the cylinders all the time. If one side is pumped harder than the other, the boat will roll even in standing water. When using an electric pump, pause to let the engine cool, especially if you're pumping several boats in a row.
Why can’t you just push it to the maximum?
If you pump the boat right up to maximum pressure, the material will not be able to stretch evenly, and local stress points will arise, which can lead to microruptures of tissue at the seams. It is recommended to first pump all cylinders to 50-60% of volume, let the boat "span" for 5-10 minutes, and then to bring the pressure to normal.
Pressure control and temperature specifications
The ambient and water temperature has a direct effect on the pressure inside the cylinders. Gay-Lussac's law states that when heated, the gas expands, which means that a boat pumped in cool weather in the morning (+15°C) can become rock solid by lunch at +30°C and burst.
The reverse is when you go out into cold water, if you pump a boat in a warm garage and then you lower it into cold water, the pressure will drop, the boat will become soft, lose shape and will be worse at resisting the wave, so always leave a small supply or pump the boat already on the water, after it has taken the temperature of the environment.
Table of pressure-temperature dependence (indicative):
| Air temperature | Recommended pressure (atm) | Action. |
|---|---|---|
| +10...+15°C | 0.25 - 0.28 | Standard pumping. |
| +20...+25°C | 0.22 - 0.25 | Watch for overheating |
| +30°C and higher | 0.18 - 0.20 | You gotta blow the air. |
| Cold water | +0.05 to normal | Water pumping is required. |
Use the thumb rule: press the cylinder with your finger. If your finger falls more than 1-2 cm, the boat is underweight. If the finger does not get hurt at all, and the balloon rings like a drum, the pressure is too high, especially in the heat.
Common mistakes and security measures
One of the most common mistakes is ignoring the manufacturer's instructions regarding maximum pressure. Users often think that "the harder the better," but for PVC, this is disastrous. A pumped boat loses elasticity, becomes brittle, and when hit by a wave or the side of another boat can simply crack at the seam.
Another mistake is to use open fire sources or powerful heat guns to smooth out the folds in the cold, which is strictly prohibited and can cause the material to instantly ignite or deform permanently. If the boat freezes, let it warm up at room temperature naturally.
The main risks in case of improper operation:
- 🔥 Overheating in the sun The main cause of balloon explosions in the summer.
- 🔪 Mechanical damage A pumped boat is more vulnerable to punctures than a blown-out boat due to the tension of the fabric.
- 🌊 Loss of stability - under-performed boat rolling, it is easier to draw water into it, and it is worse controlled.
⚠️ Warning: Never use tire-based car compressors without a pressure gauge and pressure relief valve, which can create a pressure of 2-3 atmospheres, 10 times the normal for a PVC boat and is guaranteed to destroy it.
Always carry a refit and a spare valve. Even with the most careful operation, a puncture or leakage can happen at the most inopportune moment. The ability to quickly seal a hole or replace a valve will save your fishing.
The golden rule of water motors is that it is better to underwrite a boat by 10% than to pump it by 5%. An underwhelming boat can be pumped on water, and a pumped boat is a direct route to breaking the seams and potential drowning.
Post-use maintenance and storage
When you get back from the water, you need to properly prepare the boat for storage, and don't leave it pumped for long periods, especially in a room with extreme temperatures, which leads to fatigue of the material and stretching of the seams, let the air down, but don't fold the wet boat right away.
Wash the boat thoroughly with fresh water to wash away salt, silt or river tin. Mud and microorganisms can corrode PVC when stored for long periods. After washing, let the boat dry completely in the shade, as the damp cloth in the coiled state will quickly become covered with mold.
Turn the boat down neatly, avoiding sharpened concourses in the same places. Change the fold line with each package. Keep the boat in a cover in a dry, cool place, away from heaters and direct sunlight.
Can I pump a boat with a compressor from a car battery?
Yes, you can, but only if the compressor has a built-in pressure gauge and automatic shutdown function or overpressure release valve. Conventional car compressors for tire pumping develop pressures up to 3 atmospheres and above, which is fatal for a PVC boat (maximum 0.25-0.3 atm), Using such a compressor without control is fraught with instantaneous bursting of cylinders. It is better to use specialized pumps for boats marked 0.3-0.4 barmax.
Why does the boat “blown” in the cold and what to do?
The PVC material at low temperatures (below +5°C) loses its elasticity and becomes rigid. This is normal. It is not recommended to pump the boat in extreme cold (-10°C or lower) because the material becomes brittle and can crack on the folds. If there is no exit, pump the boat in a warm room but not to full pressure, and then in the cold, carefully draw air. Remember, in the cold, the pressure will fall, and when applied to heat, it will rise sharply.
How often should I check the pressure in the cylinders while fishing?
It is recommended to check the pressure (visually or with a pressure gauge) every 1.5-2 hours of active operation, especially if the weather changes. In the morning you could pump the boat as normal, but by lunch the sun will rise and the pressure will rise. Excess air must be fired through the valve to avoid rupture. Conversely, if you are long on cold water, the boat may need to pump a little.