Bought a partially finished skoolie and found this blue bulb thing connected to the water lines near the pump. It’s not a filter. Anyone know its purpose?

Purchasing a partially finished skoolie can be an exciting endeavor, filled with potential and the promise of customization to meet your unique lifestyle needs. However, it also presents certain challenges, especially when you encounter unfamiliar components or systems you're not quite sure how to handle. One common mystery for new skoolie owners is the discovery of a blue bulb-like device connected to the water lines near the pump. Unlike a typical filter, this component's purpose might not be immediately clear, leading to questions about its function and importance.

Understanding the elements of your skoolie's water system is crucial for ensuring a safe and efficient plumbing setup, which directly impacts your comfort and convenience on the road. This article aims to shed light on the mysterious blue bulb, explain its role within the water system, and offer guidance on maintenance and troubleshooting to help you maximize the utility of your skoolie's plumbing setup.

The blue bulb you have discovered is most likely an accumulator tank, sometimes known as a pressure tank. It's a small device connected to the water system, usually installed near the water pump. Accumulator tanks are typically blue, hence the color reference, but they can also come in other colors depending on the manufacturer. They vary in size, often ranging from about 0.75 liters (0.2 gallons) to 2 liters (0.5 gallons).

The primary purpose of this device is to maintain consistent water pressure and reduce the strain on the pump by storing a small amount of pressurized water, which can help smooth out the flow when faucets are turned on. This helps to avoid the pump cycling on and off too frequently, which can lead to wear and tear over time.

An accumulator tank works by using an internal diaphragm or bladder that separates the water from an air chamber. When the water system builds pressure, some of that water is pushed into the tank, compressing the air on the other side of the diaphragm. When a faucet is opened, the pressurized air pushes the water back out, providing a smoother flow until the pump kicks in.

This mechanism helps to minimize the pump's workload by reducing the frequency of its operation. By allowing the pump to run less often but for slightly longer periods, the accumulator tank helps in conserving energy and extending the life of the pump. In typical setups, the tank is charged with air to a pressure slightly below the cut-in pressure of the pump, usually around 20-30 psi, depending on the specifications of your water system.

In skoolie conversions, space and efficiency are paramount, and every component must serve a purpose while optimizing the limited available space. Builders install accumulator tanks because they improve the performance and longevity of the water pump, a crucial component in any mobile living setup.

Without an accumulator tank, the water pump is required to start and stop frequently, which can cause it to wear out faster and consume more power. This is particularly important in a skoolie, where power resources might be limited, and reliability is a top concern. Furthermore, an accumulator tank helps to reduce water hammer noise, resulting in a quieter and more pleasant living environment.

An accumulator tank and a water filter serve entirely different purposes within a plumbing system. An accumulator tank is designed to regulate water pressure and reduce pump cycling, whereas a water filter's primary function is to remove impurities from the water supply.

Filters come in various types, such as sediment filters, carbon filters, and reverse osmosis systems, each targeting different contaminants. They require regular maintenance and replacement to ensure the quality of the water. Accumulator tanks, on the other hand, typically require less frequent maintenance and are more focused on the mechanical efficiency of the water system rather than the purity of the water.

A properly functioning accumulator tank will result in a noticeable reduction in pump cycling. When you turn on the water, you should experience a steady flow from the faucet before the pump starts, indicating that the tank is releasing its stored water.

Other signs include reduced noise levels when the pump operates, as the tank helps to dampen the vibrations and water hammer effects. If your pump is running less frequently and the water pressure remains consistent, it's a good indication that your accumulator tank is doing its job effectively.

If your accumulator tank fails or is absent, you might notice several issues. One of the most common problems is frequent pump cycling, where the pump starts and stops rapidly as water is drawn, leading to increased wear and tear.

This can also result in varying water pressure and unpleasant noise from the pump, creating a less comfortable environment. In the absence of an accumulator tank, the system may also become less efficient, consuming more power and potentially leading to premature pump failure due to overuse.

The accumulator tank acts as a buffer for the water system by absorbing pressure fluctuations, which helps to protect the pump from excessive cycling and reduces the risk of pressure spikes that could damage plumbing fixtures.

By maintaining a more consistent water pressure, the accumulator reduces the stress on joints and connections within the plumbing system, minimizing the potential for leaks and prolonging the lifespan of the entire water system.

To ensure your accumulator tank is functioning optimally, it might be necessary to adjust the pre-charge pressure. This is done by using a standard air pump to set the pressure in the air chamber to about 2-3 psi below the pump's cut-in pressure.

Regularly checking and adjusting this pressure can enhance the efficiency of your water system. Additionally, fine-tuning the pressure settings on your pump to align with the accumulator can help achieve the ideal balance for smooth operation and longevity.

Proper maintenance of your accumulator tank involves periodic checks of the pre-charge pressure to ensure it remains at the correct level. It's advisable to check the pressure every few months or before embarking on a lengthy trip.

Inspect the tank for any signs of leaks or damage, and make sure the connections are secure. It's also beneficial to occasionally clean the tank's exterior and the surrounding area to prevent dust and debris from interfering with its operation.

Accumulator tanks are durable but not indestructible. If you notice persistent issues with water pressure, frequent cycling, or if the tank is physically damaged, it might be time to replace it.

When selecting a new accumulator, consider the size and requirements of your water system. Look for a tank that matches your current setup or consult with a professional to ensure compatibility. Brands like SHURflo and Seaflo are popular choices known for their quality and reliability.

Beyond the accumulator tank, there are other upgrades you can consider to enhance the performance and comfort of your skoolie's water system. Adding flexible hoses can reduce vibrations and noise transmission throughout the vehicle.

Installing a pressure regulator can also help maintain steady water flow, and adding soundproofing materials around the pump can further minimize noise. Together, these enhancements can lead to a more enjoyable and efficient living space, allowing you to focus on the adventures ahead.