---
product_id: 49903128
title: "Everbuild P11 Central Heating System Cleanser, 1 Litre"
brand: "everbuild"
price: "$93.12"
currency: USD
in_stock: true
reviews_count: 13
category: "Everbuild"
url: https://www.desertcart.ec/products/49903128-everbuild-p11-central-heating-system-cleanser-1-litre
store_origin: EC
region: Ecuador
---

# Boosts heating efficiency Treats up to 100L system Compatible with all metals & plastics Everbuild P11 Central Heating System Cleanser, 1 Litre

**Brand:** everbuild
**Price:** $93.12
**Availability:** ✅ In Stock

## Summary

> 🔥 Clean smarter, heat better — never settle for lukewarm!

## Quick Answers

- **What is this?** Everbuild P11 Central Heating System Cleanser, 1 Litre by everbuild
- **How much does it cost?** $93.12 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.ec](https://www.desertcart.ec/products/49903128-everbuild-p11-central-heating-system-cleanser-1-litre)

## Best For

- everbuild enthusiasts

## Why This Product

- Trusted everbuild brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Powerful System Detox:** Eradicates sludge, scale, corrosion & black oxide for peak performance
- • **Silent & Warm Comfort:** Reduces noise and restores optimal heat distribution for cozy winters
- • **Economical & Efficient:** 1 litre treats up to 100 litres of system capacity—max value, minimal waste
- • **Universal Compatibility:** Safe for plastic tanks, micro bore pipes, and all metals including aluminium
- • **DIY-Friendly Maintenance:** Simple application keeps your heating system running smoother, longer

## Overview

Everbuild P11 Central Heating System Cleanser is a concentrated 1-litre solution designed to remove sludge, scale, corrosion, and flux residues from central heating systems. Compatible with plastic tanks, micro bore pipes, and all metals including aluminium, it treats up to 100 litres of system capacity, enhancing heating efficiency and reducing noise for a warmer, quieter home.

## Description

Product Description Everbuild P11 Central Heating System Cleanser will remove commissioning and flux residues from new systems and restore circulation to old systems which suffer from sludge, scale or corrosion as well as eradicating corrosive black oxide and flux residues. Everbuild P11 Central Heating System Cleanser should also be used when components are replaced or existing systems are extended. P11 Central Heating System Cleanser is compatible with plastic tanks, micro bore and all metals used in heating systems, and its use will enhance the heating efficiency of the system. P11 Central Heating System Cleanser is also economical, 1ltr will treat a 100ltr system capacity. Manufacturer Contact Information Sika Everbuild 41 Knowsthorpe Way, Leeds LS9 0SW

Review: Very effective - There was an, almost, immediate improvement in the performance of the heating system. Much quieter and warmer. As it is an "old" system I'm leaving it in the four weeks recommended.
Review: Easy to use boiler cleaner - i bought this a while ago and after using in my central heating system i think i can safely say it has worked wonders. Before use i was experiancing some noise in the system and thought it might be a good idea to apply a cleaner such as the Everbuild. Just add to your system and use as normal before flushing out again after a several weeks then apply some inhibitor... remember to read and follow manufactures instructions at each stage. Well it was the best thing. No more noise and the radiators are all nice and hot as they should be during these cold winter days. Money well spent i would recommend to those confident with a bit of DIY maintence.

## Features

- Compatible with plastic tanks, micro bore and all metals (including aluminium) used in central heating systems.
- Economical – 1ltr will treat a 100ltr system capacity.
- Enhances heating efficiency.
- Removes sludge, scale and corrosion
- Eradicates corrosive black oxide and flux residues.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B002HMRWFA |
| Batteries Required? | No |
| Batteries included? | No |
| Best Sellers Rank | 65,855 in DIY & Tools ( See Top 100 in DIY & Tools ) 629 in Central Heating System Accessories 2,316 in Building Materials |
| Customer Reviews | 4.6 4.6 out of 5 stars (256) |
| Date First Available | 15 July 2009 |
| Item Package Quantity | 1 |
| Item Weight | 517 g |
| Item model number | P11CLEAN1 |
| Manufacturer | Everbuild |
| Material | Plastic |
| Part Number | EVBP11CLEAN1 |
| Product Dimensions | 19 x 14 x 6 cm; 517.1 g |
| Size | 1 litre |
| Special Features | Concentrated |

## Product Details

- **Brand:** Everbuild
- **Contains liquid contents:** Yes
- **Global Trade Identification Number:** 05010618213100
- **Item form:** Liquid
- **Item volume:** 1 Litres
- **Item weight:** 517 g
- **Scent:** Unscented
- **Special feature:** Concentrated
- **Surface recommendation:** Metal, Plastic
- **Unit count:** 1000.0 millilitre(s)

## Images

![Everbuild P11 Central Heating System Cleanser, 1 Litre - Image 1](https://m.media-amazon.com/images/I/81Aj6fNPZKL.jpg)

## Questions & Answers

**Q: If I put this in the header tank can it be left in?**
A: You must partially drain down the system to empty the header tank then you pour in the solution.You then refil the system and leave the heting for about a month.You then completely drain down the system.When completely empty you refill the ystem ith fresh water mixed with a corrosion inhibitor.Vent all the radiators and you are protected or bout a year.RegardsDavid w.

**Q: Is this safe to use within a system that has some plastic piping and plastic push fit fittings?**
A: I would think so

**Q: When you drain down after use should you open bleed valves on radiators? I can't see that instruction on bottle. Thanks**
A: You always need to bleed the system with valves open to prevent air. You will then nee to put Inhibitor in to the system.

**Q: Where do I put this? In a radiator bleed valve or In the boiler if so where?**
A: Your system is probably filled from a connection to a tap. To introduce this cleaner you will need to drain (or part drain) the system beforehand to make some space. Then pour in the cleanser via the highest point, perhaps a radiator valve you have unscrewed and removed. you will need a flexible funnel or make up a copper funnel from standard components. Once that is done, repressurise the system by means of the tap. Run the heating for some time before draining down to remove the water and sludge, then flush again and finally repressurise, remembering to add the protective additive beforehand using the same entry point. If you are unsure, it would be worth finding a knowledgeable friend or neighbour to help. If you have an unpressurised system (Small second water tank in loft) then you could just pour the cleanser into that tank after first shutting off its water supply, but get someone to check what you intend to do or you might put the cleanser in the wrong tank = Disaster. Get live advice.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Very effective
*by S***K on 12 April 2025*

There was an, almost, immediate improvement in the performance of the heating system. Much quieter and warmer. As it is an "old" system I'm leaving it in the four weeks recommended.

### ⭐⭐⭐⭐⭐ Easy to use boiler cleaner
*by M***W on 16 December 2017*

i bought this a while ago and after using in my central heating system i think i can safely say it has worked wonders. Before use i was experiancing some noise in the system and thought it might be a good idea to apply a cleaner such as the Everbuild. Just add to your system and use as normal before flushing out again after a several weeks then apply some inhibitor... remember to read and follow manufactures instructions at each stage. Well it was the best thing. No more noise and the radiators are all nice and hot as they should be during these cold winter days. Money well spent i would recommend to those confident with a bit of DIY maintence.

### ⭐⭐⭐⭐ really bad. Fed through with low heat first for a ...
*by M***O on 31 December 2016*

Used this to clear some stubborn limescale out through header tank immersion and starley Johnson water heater exchange which was not working almost, really bad. Fed through with low heat first for a few hours then put heat full up on gas then put electric immersion on hot. When flushed out I was surprised I never saw lots of hard bit of limescale come out but water was quite murky and system is working like new again. As the system is about 15 years old though it might need replacing and copper immersion at be 30 years? Or longer. See how it goes using bad of fernox softener in header to help keep new build up at bay. So I give 4 stars as pleased with delivery time and that it seems to have done an excellent job.

## Frequently Bought Together

- Everbuild P11 Central Heating System Cleanser, 1 Litre
- Everbuild P14 Central Heating System Inhibitor, 1 Litre
- Just Dose It Central Heating Dosing Tool, Radiator Dosing Funnel - For Adding Chemicals Like Fernox Central Heating Inhibitor, Sludge Remover, Leak Sealer & Sentinel X100

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*Product available on Desertcart Ecuador*
*Store origin: EC*
*Last updated: 2026-02-28*