Sand filters Bestway - one of the most popular solutions for maintaining water purity in inflatable and frame pools. However, many owners encounter problems: cloudy water, low pressure or rapid wear of equipment. Most often the cause is incorrect use of filtering modes. In this article we will analyze all the operating modes of the sand filter Bestway (including models Flowclear, Steel Pro and others), we will explain their purpose, the nuances of switching and typical errors that shorten the service life of the system.

Why is this important? The sand filter is not just “turn it on and forget it.” Its effectiveness depends on proper alternation of modes, timely washing and taking into account the features of a particular model. For example, The “Backwash” mode should take at least 2-3 minutes to completely remove contaminants from the sand, otherwise the filter will start working “idle”. We have collected all the critical information that you will not find in the standard instructions - from hidden functions to methods for diagnosing malfunctions based on the behavior of the pressure gauge.

1. Basic modes of the Bestway sand filter and their purpose

All filters Bestway (except for the most budget models) are equipped with a 6-position valve that allows you to switch between modes. Each of them performs a strictly defined function. Important: Incorrect use of modes can lead to pump failure or filter sand clogging.

Let's look at all the available options:

  • 🔄 Filter — the main mode for water purification. Water passes through a layer of sand, where mechanical impurities (sand, dirt, hair) are retained. Operates at a pressure of 0.5–1.5 bar.
  • 💦 Backwash — removes accumulated contaminants from sand through reverse flow of water. Required when the pressure on the pressure gauge increases by more than 0.3–0.5 bar from the initial one.
  • 🧼 Rinse — flushes the system after backwashing, restoring the correct position of sand in the filter. Duration: 30–60 seconds.
  • 🚫 Closed — blocks the flow of water (used for maintenance or winter preservation).
  • 💧 Drain/Waste — allows you to drain water from the pool bypassing the filter (for example, to replace water or lower the level).
  • 🔄 Recirculate — water circulates without passing through sand (used to distribute chemicals or if the filter is temporarily faulty).

Important: modes Backwash and Rinse always used in pairs. Skipping a rinse after backwashing results in dirt getting back into the pool!

📊 Which Bestway filter mode do you use most often?
Filtration
Backwash
Rinse
Drain

2. How to switch modes correctly: step-by-step instructions

Switching between modes is a seemingly simple procedure, but there are nuances that are not written about in the instructions. For example, the valve can only be switched when the pump is off (otherwise you risk breaking the mechanism or stripping the thread). It is also important to follow the sequence of actions, especially when switching to Backwash.

Switching algorithm:

Switch off the pump with the button ON/OFF

Make sure the pressure gauge shows pressure below 1.5 bar (otherwise release the pressure through the valve)

Turn the valve handle to the desired position (until it clicks)

Turn on the pump and monitor the pressure for the first 30 seconds

After completion of work, turn off the pump again before the next changeover-->

Pay special attention to the transition to Backwash:

  1. Turn off the pump.
  2. Connect a hose to drain dirty water (if not already done).
  3. Move the valve to position Backwash.
  4. Turn on the pump and monitor the clarity of the water in the viewing window (if equipped). Rinsing is complete when the water runs clear (usually 2-4 minutes).
  5. Turn off the pump, turn the valve to Rinse, turn on the pump for 30–60 seconds.
  6. Return to mode Filter.
⚠️ Attention: If after backwashing in mode Filter the pressure rises faster than usual, this is a sign that the sand has compacted or requires replacement. In models Bestway 58477E/58478E this occurs after approximately 3–5 seasons of operation.

3. Frequency of use of modes: when and how often to rinse the filter

One of the most common questions is: “How often should I backwash?” The answer depends on three factors:

  • 📊 Pool usage intensity (number of swimmers, presence of children/animals).
  • 🌡️ Water temperature (in warm water bacteria multiply faster, increasing the load on the filter).
  • 🌿 Environment (proximity of trees, dusty roads, wind).

As a general rule, backflushing is required when the pressure gauge pressure exceeds the original value by 0.3–0.5 bar. For most pools Bestway with a volume of 3–5 m³ this happens every 3–7 days with daily use. However, there are exceptions:

Operating conditions Recommended Backwash Frequency Notes
The pool is used 1-2 times a week, there is no heavy pollution Once every 10–14 days The pressure increases slowly, you can focus on the visual turbidity of the water
Daily bathing 3–5 people, water temperature above 28°C Every 3–5 days It is recommended to combine with the addition of chlorine or other disinfectants
Outdoor pool, poplar/pine trees nearby, dusty roads Every 2–3 days Leaves and dust quickly clog the sand; sand may need to be replaced more often (every 2 seasons)
After heavy rain or wind Immediately Even if the pressure has not increased, a lot of mechanical impurities get into the water

Tip: Keep a blood pressure log. Record your pressure gauge readings at the same time every day. This will help identify patterns and prevent premature filter wear. In models Bestway Flowclear With a digital display, you can set an alert when flushing is required.

💡

If your filter does not have a pressure gauge (as in models Bestway 58386E), focus on the water pressure from the nozzles. A decrease in pressure by 30% or more is a signal for backwashing.

4. Typical operating errors and their consequences

Even experienced pool owners sometimes make mistakes that shorten the life of the filter or degrade the quality of the water. Here are the most common:

  • ⏳ Backwash too short (less than 2 minutes). In this case, the dirt does not have time to be washed out of the sand, and the filter quickly becomes clogged again. Consequence: pressure increases to critical values ​​and the risk of hose rupture.
  • 🔄 Skip rinse (Rinse). After backwashing, the sand remains “suspended”, and when moving into Filter dirt will fall back into the pool. Symptom: cloudy water immediately after rinsing.
  • 🚫 Using the mode Closed with the pump running. This leads to water hammer and seal failure. The valve always switches only when the pump is switched off!
  • 🧂 Replacing sand with unsuitable one. For example, the use of fine sand (fraction less than 0.4 mm) or gravel. This reduces filtering capacity and can damage the pump. For Bestway Only quartz sand with a fraction of 0.4–0.8 mm is suitable.
  • ❄️ Operation at temperatures below +5°C. The water in the hoses and pump freezes, which leads to cracks in the housing. Even if the pool is not used in winter, the filter must be preserved according to the instructions.
⚠️ Attention: If after backwashing the pressure does not drop to the original level, this may mean that the sand has caked or an air lock has formed in the system. In this case it will help deep flushing: turn the valve to Backwash, turn on the pump for 5-7 minutes, then repeat the rinse. If this does not help, the sand needs to be replaced.

5. Diagnosis of faults based on filter behavior

Filter Bestway can “signal” problems by changes in pressure, noise or water quality. Let's look at the main symptoms and their causes:

Symptom Possible reason Solution
The pressure on the pressure gauge rises too quickly (within 1–2 days) The sand is caked or contaminated with oils/creams. Possible air leakage through seals Carry out a deep rinse (5–7 minutes per Backwash). If that doesn't help, replace the sand or O-rings.
Low pressure (less than 0.3 bar) when the pump is on Pump prefilter clogged, air lock or impeller worn Clean the prefilter, check the hoses for leaks. If the problem remains, disassemble the pump and inspect the impeller
The water remains cloudy even after rinsing The sand has lost its filtering properties, the valve valve is faulty or the chlorine level is insufficient Replace sand (every 3–5 seasons). Check valve operation. Add chlorine or coagulant
The pump hums, but the water does not circulate Pump impeller clogged or condenser broken Clean the impeller of debris. If it doesn’t help, replace the capacitor (a typical problem with models Bestway 58384E)

For accurate diagnosis it is useful to know initial pressure your filter (write it down when you first install it). For example, if the normal operating pressure is 0.8 bar, and now it rises to 1.4 bar per day, this is a clear sign of clogged sand or a valve malfunction.

How to check the operation of the valve valve?

Turn off the pump and turn the valve to position Backwash. If the handle rotates too easily or, conversely, with too much effort, this is a sign of wear on the O-ring. To replace, you will need to disassemble the valve (in models Bestway standard rings with a diameter of 2–3 mm are used; they can be found in plumbing stores).

6. Sand replacement and maintenance

Sand in the filter Bestway - consumables. Over time, its particles wear out, lose their sharp edges and no longer retain small contaminants. Average service life of sand - 3–5 seasons (with intensive use - 2 seasons). Signs that it’s time to change the sand:

  • 📉 Pressure increases every 1-2 days, even after backwashing.
  • 💧 The water remains cloudy despite regular washing and adding chemicals.
  • 🔍 A small suspension appears in the pool, which the filter does not catch.

Sand replacement process:

  1. Disconnect the pump from the network.
  2. Move the valve to position Closed.
  3. Unscrew the top filter cover (in models Bestway Flowclear you will need a 10 or 12 key).
  4. Remove the old sand (you can use a vacuum cleaner or dustpan).
  5. Rinse the inside of the filter with water to remove any remaining sand.
  6. Fill in new quartz sand with a fraction of 0.4–0.8 mm (the volume is indicated in the instructions, usually 12–25 kg depending on the model).
  7. Make sure the center tube is level and screw on the cap.
  8. Rinse (Rinse) for 1-2 minutes to remove dust from the new sand.
⚠️ Attention: Never use beach sand or construction sand! They contain clay, silt and organic impurities that will quickly clog the filter. Only special quartz sand for pools (sold in pool chemical stores or AliExpress).

In addition to sand, other elements require regular maintenance:

  • 🧽 Pump pre-filter - clean every 2-3 weeks (unscrew the lid and rinse under running water).
  • 🔧 O-rings - lubricate with silicone grease once a season (prevents drying out and cracks).
  • 🌡️ Pressure gauge — check the accuracy of the readings once a year (compare with a mechanical pressure gauge).
💡

Replacing sand is not only a matter of water purity, but also safety. Worn-out sand can seep into the pool, causing skin and eye irritation. This is especially true for children and people with sensitive skin.

7. Winter preservation of the Bestway filter

If the pool is not used in winter, the filter must be properly prepared for storage. Failure to comply with this rule is the main cause of pump breakdowns in the spring. Here's what to do:

  1. Drain the pool and hoses (use the Drain or disconnect the hoses).
  2. Perform a final backwash and rinse.
  3. Disconnect the pump from the mains, unscrew the filter cap and remove the sand (store it in a dry place).
  4. Rinse the filter housing and pump with clean water, removing any remaining chemicals.
  5. Remove all hoses, gaskets and seals. Dry them and lubricate them with silicone grease.
  6. Store the pump and filter in a dry place at temperatures above 0°C (for example, in a garage or storage room).

Errors during conservation:

  • ❄️ Leaving water in the pump or hoses (when freezing, the ice breaks the plastic).
  • 🧂 Storing sand in a damp state (leads to the formation of lumps and mold).
  • 🔌 Connecting the pump to the network in winter (even a short-term switching on without water will burn the engine).

For electronically controlled models (eg Bestway Flowclear Sand Filter Pump 58477E) Before storing, remove the batteries from the remote control, if equipped.

FAQ: Frequently asked questions about Bestway filter modes

Can I use a filter without sand?

No, this will damage the pump. Sand not only filters water, but also protects the impeller from large particles. As a last resort, you can temporarily use the mode Recirculate (recirculation), but not longer than 1–2 days.

Why does the water become cloudy after backwashing?

Most likely you missed the mode Rinse (rinse). In this case, the remaining dirt from the sand ends up back into the pool. Also, turbidity can be caused by wear and tear of the sand - it’s time to replace it.

Which sand is better: quartz or glass?

For filters Bestway quartz sand with a fraction of 0.4–0.8 mm is recommended. Glass sand is more expensive, but lasts longer (up to 7 seasons) and retains fine particles better. However, it requires more thorough flushing and is not suitable for budget pump models.

Can the filter be washed with bleach?

No, bleach destroys the seals and plastic parts of the pump. To clean the filter, use only mechanical washing (modes Backwash and Rinse). If disinfection is necessary, rinse the filter housing with a vinegar solution (1:10) after removing the sand.

What to do if the pump does not turn on?

Check:

  1. Connection to the network (socket, plug, RCD).
  2. Fuse in the pump plug (some models have one).
  3. Check the pump impeller for jamming (unscrew the cap and remove debris).
  4. Capacitor (if the pump hums but does not rotate).

If the problem is not resolved, contact the service center Bestway - in most cases this is a warranty case.