Pool Pressure Washing Guide (How To Clean A Swimming Pool)

If you own a pressure washer you don’t need me to tell you just how much fun they are to use. And how satisfying it is to watch the transformation from dirty to sparkling clean in such a short time span. Using a pressure washer doesn’t only clean, it sanitizes too which is very important with swimming pools.

Pressure Washing A Swimming Pool Guide

The first thing you have to establish is whether it is safe to clean your pool with a pressure washer. If your pool is constructed of fibreglass or vinyl it cannot be cleaned using a pressure washer. This is because pressure washers are too powerful even at the lowest settings, and will damage the pool.

So assuming your pool is made from concrete, plaster, or exposed aggregate and is strong enough to take the pressure exerted by a pressure washer let’s get started. Follow our easy to follow step by step guide to pressure wash your pool quickly and efficiently.

  1. Empty the pool – Drain the pool completely of water and allow to dry.
  2. Sweep the pool floor – With a broom or brush clear as much dirt and debris as you can from the floor of the pool.
  3. Protect all electrical components – Cover all pump motors, heaters, music systems etc, with plastic sheeting that’s taped down with masking tape.
  4. Start with the walls – Pressure wash the walls first using the black or detergent nozzle, take a section at a time making sure you don’t miss any area.
  5. Apply detergent – Once everywhere is wet, add the correct detergent and spray from the bottom of the wall up to the top. Keep respraying any areas that start to dry out. 
  6. After around 10-15 minutes, change nozzles to the white nozzle and rinse from the top of the walls down.
  7. Rinse the floor – Starting from furthest away and finishing at the drain.
  8. For algae that won’t budge – Switch to the turbo nozzle, this spins as it flows giving extra cleaning power without extra pressure and is perfectly safe for cleaning pools.
  9. If algae won’t budge – Apply a special algicide and allow to work, then rinse off with the pressure washer.

If you don’t have any algicide, you can try our home-made formula. Take 1 cup of bleach and mix with 4 cups of water, wearing gloves, scrub with a hand brush. After around 10-15 minutes once the algae is all gone rinse with clean water.

Never put bleach into the pressure washer as it will damage your pressure washer.

Other Tips For Cleaning A Swimming Pool With A Pressure Washer

Gas Pressure Washer

The better pressure washers come with a range of accessories and attachments to make any cleaning task easier. If yours doesn’t, they can be bought in many DIY or hardware shops and are readily available online. Take care when buying extra attachments because many are interchangeable, but some have specialised fittings that can only be used on that specific make of pressure washer.

Here are a few attachments designed to make pool cleaning with a pressure washer even easier. 

  • Precision nozzle – By using a precision nozzle, you’ll easily be able to reach edges, and tile joints. It’s also effective for removing limescale build-up and ingrained dirt.
  • Brush attachments –  Using a brush attachment on your pressure washer can help to remove the most difficult stains including certain types of algae.
  • Extension hoses – Adding an extra hose extends the area you can cover inside the pool without the hassle of having to relocate during cleaning.
  • Floor cleaning lance – The floor cleaning lance cleans larger areas faster than just using the pressure washer hose. Due to the design, using a pressure washer floor cleaning hose will also make short work on swimming pool walls as well as floors.

Using a pressure washer to clean the poolside area will also take much of the work out of this task too. Diving boards, slides, sunbeds, tables, deck chairs and sun loungers can all be cleaned easily and quickly using a pressure washer.

Why Clean A Swimming Pool?

Swimming pool water can contain many germs, some of them quite serious according to the Centers for Disease Control and prevention (CDC) infected pool water can cause symptoms of:

  • Diarrhoea
  • Skin rashes
  • Ear pain
  • Coughs
  • Congestion
  • Eye pain

That’s without the possibility of the waterborne germ Cryptosporidium which can cause serious, even fatal health risks for people with weakened immune systems. These germs are present even in water treated with chlorine or bromine. The problems arise if the pool chemicals are added in insufficient quantities.

Swimming Pool Algae

Allowing the germs to build-up to truly unsafe numbers. This is on top of the usual dirt and debris that enters a back yard pool over time. Then there are the problems associated with algae.

Algae is not harmful to humans, but it’s a breeding ground for microbial germs that can cause painful rashes on human skin. It is commonly believed that by increasing your chlorine levels in pool water the algae will not be able to survive. This is not true, yellow or mustard algae actually thrive in pools with high levels of chlorine in the water.

Frequently Asked Questions

Can you power wash a swimming pool?

As long as the pool is constructed of a strong enough material to withstand the power exerted from a power washer, it is the fastest and most efficient way to wash a swimming pool.

Are pressure washer nozzles universal?

Although the colour coding for pressure washer nozzles are universally recognised, nozzle sizes and connectors vary from company to company.

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