No hot water?


Scalgon are the UK’s leading experts in limescale removal. Primarily the descaling of secondary hot water heat exchangers in combination (combi) boilers, but also thermal store systems such as Gledhill mains-pressure hot water stores. A premium service is offered, and backed up with over 40 years experience. Past customers include British Gas, Thames Water, Reading Borough Council, Reading University, McCarthy & Stone, and very many housing-management and letting companies. And, of course, very many plumbing and heating engineers use me too.

I love this! Truth is, I like a challenge. And I’ve been set many challenges by limescale for over 37 years now. I like it best when someone says I won’t be able to do it! I can break limescale down (sometimes in just a few minutes) by using a acid/water solution - sent through your pipes by a clever little machine. Most of my work is descaling combi boilers. As combi boilers use mains water then they are prone to limescale formation. There are also thermal store hot water heaters. And often there are just pipes that need descaling.





How to book an appointment:

Make contact with me (preferably email or text, please), I will allot you a date (a.m./p.m. your choice). If you are not going to be present during the work, then there is a requirement to make payment before I visit - by card or bank transfer. But if you can be there, then you can pay by cash, cheque, or bank transfer immediately the work is finished.


If you would like a CombiBuddy fitted (to stop the limescale coming back) or a LimeStop fitted (to protect a thermal store, or home, against limescale) please let me know before I visit. See panel to the right.


Please note that I have to park outside of the property, as my equipment is heavy. I ask you to ensure that you know where your stop cock is, that it works, and that it does turn off the water supply to your boiler. If it turns off other homes, then that isn’t it!


So, which do you have, a combi boiler or a thermal store?...


Combi boiler?

Combi boilers either have a conventional separate ‘secondary’ heat exchanger, or they have a ‘plated’ heat exchanger (Intergas boilers use a twinned heat exchanger). It’s this part which has mains water running through it (to be heated), so it’s this part of your combi boiler that gets all ‘scaled-up’. I can easily descale it by accessing your pipe network via a water in/water out connection. This is why descaling is often better than simply replacing the heat exchanger, as I descale the outlet pipes as well. The process takes about 1-2 hours, and uses a safe acid which is recommended by boiler manufacturers. I do NOT use hydrochloric acid. I don’t usually access the drinking water part of your system, though it is sometimes necessary. If you are a property owner (landlord) and you cannot be there during the work, then it is required that you pay in advance by bank transfer.


Thermal store?

Thermal store water heaters (like Gledhill products) shouldn’t be confused with ‘Heat Banks’. Thermal stores heat cold mains water when it’s needed. A heat bank heats the cold water, then banks it for future use. Thermal store systems (like Gledhill products) have either a plated heat exchanger on the outside of the heater that looks like a steel brick, or it has a coil of pipe inside which is called a calorifier. This acts as a heat exchanger. This coil can get VERY scaled-up, to the point of being completely blocked. But as long as there is some flow, then I can descale it. The process takes 2-3 hours. I use a safe acid which is recommended by boiler manufacturers. I do NOT use hydrochloric acid. If you are a property owner (landlord) and you cannot be there during the work, then it is required that you pay in advance by bank transfer. PLEASE ensure to isolate the heating to your thermal store 36 hours prior to our visit.


For descaling in Reading, and around the Berkshire area, I am the ONLY choice! I work in the RG postcode area. The costs quoted above apply throughout the RG postcode area. But I am prepared to travel to:

South Oxfordshire

South Buckinghamshire

West London

West Surrey

North Hampshire

East Wiltshire

I charge a travel fee of £1 per mile ‘round trip’ for any location outside of the RG postcode area, so if the distance to your property is 36 miles, the travel charge would be £72. Check it on Google Maps. Please note that if your property is NOT in the work area outlined above then I cannot help you. Sorry, I don’t go to inner London - inside the North & South Circular Roads, or East London.


If your thermal store cylinder has come to the end of its life, then just get a new one - go to our sister site, Tebe and see about getting a brand new one from just £1,500




Recommended by Gledhill to descale their thermal store cylinders







Deep Blue

Just £89 - FREE delivery


Stops Limescale


See it at www.limestop.co.uk


The CombiBuddy STOPS limescale in your combi boiler from just £99. It’s absolutely guaranteed!...or your money back


It’s an amazing little device!

It fits on the water supply going to your boiler.

It’s replaced every two years (at a discounted rate). To order, just click HERE



Got a thermal store hot water cylinder?


In a hard water area, it’s just a matter of time before it scales up. You could pay almost £2,000 to replace it.

And yet you can stop it scaling up from just £119...


The LimeStop TS stops limescale in your thermal store GUARANTEED!

See HERE for more.


Do you need a new hot water cylinder, or even a new electric boiler to replace your current gas one (your only real option where there are flue concerns)...



Click HERE


The Electric Boiler Engineers




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5 x bags - just £49

1 x bag - £13

(25 kg)

Water softener salt

Delivered FREE

RG postcode only

Postal area restrictions apply

Text us on 0770 231 6157


We’re cheaper than

‘online salt deliveries’!








Read the terms & conditions HERE


Read all about limescale inhibitors HERE


For plumbing & heating advice and help, click on thehotplumber.com




Scalgon, 19 Cockney Hill, Reading. RG30 4HF

Tel. 0770 231 6157





Limescale removal & prevention

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Telephone us

Email us




Limescale inhibitors


I’m an ex-British Gas engineer, and unlike so many ‘engineers’ I tell you right here, in advance, how much it will cost. For descaling a combination boiler it’s £229 (all inclusive). For descaling a thermal store it’s £329 (all inclusive). For descaling pipework it’s £329 (all inclusive). You pay NOTHING else.*

If I find that your problem isn’t limescale, then you DON’T pay for the descale, you merely pay my call-out charge.


*Please note that this applies within the RG postcode ONLY

Are you a member of the emergency services?

You get a 10% discount on ALL prices.

That’s for ALL services (not materials).


Are you in? 10% discount applies to first-response ambulance personnel, paramedics, hospital nurses, and firefighters.