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July 2026

How to Keep Paddling Pool Water Clean

Every summer, especially when we get a proper heatwave, the same question from customers and parents does the rounds: “Do I really need to empty the paddling pool every day?”

I get it. You’ve spent time filling it up, the kids have had a brilliant afternoon splashing around, and the last thing you want to do is pull the plug and start all over again the next morning.

The good news is that you don’t always have to empty it every day. The bad news is that paddling pool water can become dirty much quicker than most people realise if you don’t keep an eye on it.

As a plumber, I spend my days working with water systems in family homes across Bromley and the surrounding areas. While a paddling pool isn’t exactly the same as your home’s plumbing, the basic principle is similar… water that’s left sitting in warm conditions without being cleaned can quickly become unpleasant.

So, here’s how I recommend keeping paddling pool water clean without wasting water or money.

Why Paddling Poor Water Gets Dirty So Quickly

Most people assume the water is still clean because it looked crystal clear when they filled it. Unfortunately, that’s not how it works.

Think about everything that ends up in the water during a typical summer’s day:

Sunscreen washing off skin
Sweat
Grass clippings
Leaves
Dirt from little feet
Dead insects
Pollen
The odd ice lolly or biscuit that somehow finds its way into the pool!
Even the family dog trying to cool down

None of those things are unusual. In fact, they’re exactly what you’d expect when children are playing outside. The trouble is that warm weather speeds everything up. The hotter it gets, the quicker water can lose its freshness.

My Simple 48-hour Rule

One piece of advice I give to customers is what I call my 48-hour rule. It’s not a strict rule that says you must empty your paddling pool after exactly two days. Instead, use it as a reminder.

If the same water has been sitting outside for around 48 hours during hot weather, stop and ask yourself:

If the answer to any of those is yes, it’s probably time to empty it, give the pool a quick clean and refill it. Every family’s situation is different, but I’ve found it’s a good habit that stops people leaving the same water sitting for far too long.

Do You Really Need to Change Paddling Poor Water Every Day?

In most cases, no.

Most people think there’s only two options:

The sensible answer usually sits somewhere in the middle. If the water is still clean, the pool has been covered overnight and it’s only had light use, there’s often no reason to throw hundreds of litres of perfectly good water away.

On the other hand, if it’s been baking in full sun all weekend with half the neighbourhood’s children jumping in and out, I’d be much more inclined to start fresh. Common sense goes a long way.

My Routine for Keeping Paddling Pool Water Clean

If it were my own family using the pool, this is what I’d do…

1) Remove leaves and insects after every use

It only takes a minute, but getting rid of debris stops it sitting in the water unnecessarily.

2) Give the pool a quick rinse before refilling

When you do empty the water, don’t just refill it straight away. Give the sides and bottom a quick clean first to remove any slime or dirt that’s built up.

3) Cover the pool if you can

A simple cover helps stop leaves, insects and other garden debris ending up in the water overnight.

4) Keep pets in their own pool

I know plenty of dogs love cooling off in a paddling pool, but if possible, give them a separate one. I know this might prove impossible for some dogs, but it keeps things much cleaner for everyone if you can make it happen.

5) Check the water before the children jump back in

Trust your eyes. If the water looks cloudy, smells unpleasant or just doesn’t look right, don’t risk it. Fresh water is always the safer option.

Signs It's Time to Empty The Pool

Rather than watching the clock, watch the water. I’d empty and clean the pool if:

The water has gone cloudy.
The sides feel slippery.
There's a noticeable smell.
It's full of grass, insects or debris.
The water has been sitting in very hot weather for a couple of days.
A child (or a pet or a bird) has had an accident in the pool!

If in doubt, empty it.

Is It Cheaper to Clean the Water Than Refill It?

Absolutely. Water isn’t free, and during a hot spell it’s surprising how quickly the cost adds up if you’re filling a paddling pool from scratch every day.

A family sized paddling pool might only cost a few pounds to fill once, but in a heatwave, people top them up every day – that could add up to £15, or even £25 over the course of a week. That’s money that could otherwise go towards a family day out in the school holidays or a new school uniform.

A little bit of maintenance can often save both water and money.

That doesn’t mean hanging onto dirty water for the sake of a few pounds, but equally there’s no need to throw perfectly good water away if it’s still clean and has been looked after.

A Quick Word About Outside Taps

How much hassle it is carrying buckets through the house to top up a paddling pool? It’s a common ‘ick’.

If you’re forever dragging hoses through windows or filling buckets in the kitchen, an outside tap can make life much easier.

And if you’d rather have one professionally installed, take a look at our general plumbing services. We’d be happy to help. It’s possible to fit a mixer tap outside too or connect your existing outside tap to your hot water supply, if you’d like the option of hot water outside too.

My final advice...

Paddling pools are one of the best things about a British summer. I’d never tell families not to use one. Just don’t forget that they’re still holding standing water in warm weather.

A quick check each day, a bit of common sense and my 48-hour rule will usually tell you everything you need to know.

Looking after the water properly means your children can enjoy the sunshine safely, you’ll waste less water, and you’ll spend less time constantly emptying and refilling the pool.

That’s a win all round.

Founder & Managing Director, Bromley Plumbers

Bromley Plumbers is a trusted plumbing and drainage company serving Bromley, Beckenham, Sidcup, Croydon, and surrounding areas. Founded in 2017 by Jack Cox, the company focuses on reliable domestic and commercial plumbing services, from installations and repairs to unblocking drains. With a dedicated team of skilled engineers, Bromley Plumbers is committed to quality workmanship, local expertise, and excellent customer service.

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