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Heating systems and heat pumps

It works when it's sealed: safely checking heating systems and heat pumps

No detours during commissioning, renovation and maintenance

Leak tests are a must – especially for modern heating systems with heat pumps or water-based underfloor heating. Our digital testing devices offer reliable results, intuitive operation and complete documentation.

Brief overview

✔ Suitable for heat pump systems, heating circuits and underfloor heating
✔ Support during commissioning, renovation and maintenance
✔ Digital test reports – legally compliant & immediately available
✔ Compact, robust devices – ready for immediate use
✔ Fast Esders service – personal & competent

Digital documentation

Easy compliance with standards and guidelines

Competent service

Better understanding of a busy schedule

Made in Germany

High quality and personalised technical support

Assets for download

We have a sample report on water load testing available for you to download here.

We have a sample report on water leak testing available for you to download here.

We have a sample report on gas load testing for the TONI GasTest CH4 and TONI CombiTest CH4 available for you here. Download it now and take a look at the report.

Digital protocols as they should be

Our measuring devices record all test values digitally, including start and end pressures, test time, minimum and maximum values.

The Esders Connect app automatically saves the results, creates test reports and, if required, can also send them automatically by email – no paperwork, no rework.

Fast service when it matters

Heating and heat pump systems can be complex. Our customer service is not.
Whether you need spare parts, a mobile service team or help with documentation, we offer reliable assistance exactly when you need it – without any unnecessary delays.

For greater quality in the system

Our devices are developed and manufactured in Haselünne with the aim of making work on the construction site easier and safer. Whether it’s load testing on the heating pipe, leak testing before the screed or the serviceability test according to TRGI: with Esders, specialist tradesmen and utility companies are on the safe side.

Before heating systems can deliver their full performance, it must be clear that there are no leaks and no safety risks.

Devices for everything that flows warmly through pipes

Our  devices are developed to meet the requirements for testing heat pumps and heating circuits. They provide reliable measurement results, are intuitive to use, and save valuable time through digital data recording – especially for tightly scheduled tasks and parallel work.

Our TONIs for testing heating systems and heat pumps

TONI CombiTest R
TONI CombiTest R
Robust, precise digital pressure gauge for differential pressure measurement. Illuminated graphic display with menu navigation for accessing minimum and maximum pressure, start and end pressure, as well as pressure drop. Can also be used as a refrigerant gas detector with a remote sensor in the gooseneck. Refrigerant concentration is displayed on the screen. Leakage alarm thanks to a switchable audible and visual alarm as well as a quiet vibration alarm. Common refrigerants are detectable according to EN 14624, including R290, R32, R134a, and R1234yf. Operating time: up to 140 hours as a digital manometer with a fully charged battery, without illumination, and at an ambient temperature of 20°C up to 17 hours in detection mode with a fully charged battery, without illumination, and at an ambient temperature of 20°C. Gooseneck length: 34.5 cm Housing dimensions: 13 cm x 6.5 cm x 3 cm Device weight: approx. 270 g
To the shop
TONI GasTest R
TONI GasTest R
Refrigerant gas detector with a remote sensor in the gooseneck. Refrigerant concentration is displayed on the screen. Leakage alarm thanks to a switchable audible and visual alarm as well as a quiet vibration alarm. Common refrigerants are detectable according to EN 14624, including R290, R32, R134a, and R1234yf. Operating time: up to 17 hours in detection mode with a fully charged battery, without illumination, and at an ambient temperature of 20°C. Gooseneck length: 34.5 cm Housing dimensions: 13 cm x 6.5 cm x 3 cm Device weight: approx. 270 g
To the shop
TONI PT HP10
TONI PT HP10
Robust, precise digital manometer for differential pressure measurement in the low pressure range, as well as a high-pressure port. Backlit graphic display with guided menu sequences for tests according to regulations. Measuring range:     Low pressure: 0 – 2000 mbar     High pressure: 0 – 10 bar / 0,1% accurancy Operating time: approx. 140 hours with fully charged battery, without backlight and at 20°C ambient temperature Housing dimensions: 16.5 cm x 6.5 cm x 3 cm Device weight: approx. 280 g
To the shop
TONI PT HP 25
TONI PT HP 25
Robust, precise digital manometer for differential pressure measurement in the low-pressure range, as well as a high-pressure port. Backlit graphic display with guided menu sequences for tests according to regulations. Measuring range: Low pressure: 0 – 2000 mbar High pressure: 0 – 25 bar / 0,1% accurancy Operating time: approx. 140 hours with fully charged battery, without backlight, at 20°C ambient temperature Housing dimensions: 16.5 cm x 6.5 cm x 3 cm Device weight: approx. 280 g
To the shop

TONI device solutions for other areas of application

TONI GasTest CH4 0-10.000 ppm
TONI GasTest CH4 0-10.000 ppm
Robust and precise gas leak detector with sensor attached on the gooseneck. Shows measured gas concentration on a display. Equipped with visual flashing, audio and vibrating gas alarm when selected concentration threshold is reached. Alarm can be silenced. Handheld with integrated magnet on the back and USB-C charging connection. Measurement range: 0 - 10.000 ppm methane Display range: up to 2.2 vol. % methane Operating hours: up to 30 hours in leak detection mode with fully charged battery and 20°C ambient temperature Gooseneck length: 34,5cm Housing dimensions: 13cm x 6,5cm x 3cm Weight: approx. 260g
To the shop
TONI GasTest CH4 0-10.000 ppm
TONI GasTest CH4 0-10.000 ppm
Robust and precise gas leak detector with sensor attached on the gooseneck. Shows measured gas concentration on a display. Equipped with visual flashing, audio and vibrating gas alarm when selected concentration threshold is reached. Alarm can be silenced. Handheld with integrated magnet on the back and USB-C charging connection. Measurement range: 0 - 10.000 ppm methane Display range: up to 2.2 vol. % methane Operating hours: up to 30 hours in leak detection mode with fully charged battery and 20°C ambient temperature Gooseneck length: 34,5cm Housing dimensions: 13cm x 6,5cm x 3cm Weight: approx. 260g
To the shop
TONI GasTest CH4 0-10.000 ppm
TONI GasTest CH4 0-10.000 ppm
Robust and precise gas leak detector with sensor attached on the gooseneck. Shows measured gas concentration on a display. Equipped with visual flashing, audio and vibrating gas alarm when selected concentration threshold is reached. Alarm can be silenced. Handheld with integrated magnet on the back and USB-C charging connection. Measurement range: 0 - 10.000 ppm methane Display range: up to 2.2 vol. % methane Operating hours: up to 30 hours in leak detection mode with fully charged battery and 20°C ambient temperature Gooseneck length: 34,5cm Housing dimensions: 13cm x 6,5cm x 3cm Weight: approx. 260g
To the shop

Related products: testing accessories for heating systems

Suitable connection cables, adapters, or transport bags: our accessories expand the possibilities of our device technology and ensure that you remain flexible even on changing construction sites.

House connection set water
House connection set water
House connection set water for DruckTest GaWa Included: Art.: 262031 - connection hose GaWa, length: 1 m Art.: 262032 - Adapter 1" int. thread fits to Gardena Art.: 262033 - Adapter 3/4" int. thread fits to Gardena Art.: 262034 - Adapter 1/2" int. thread fits to Gardena Art.: 262035 - Adapter 1/2" ext. thread fits to Gardena Art.: 262036 - Adapter 3/8" int. thread for angle valve Art.: 262037 - Adapter 1/4" ext. thread for drain valve Art.: 262038 - Adapter M22 int. thread for diffusor Art.: 262039 - Adapter M24 ext. thread for diffusor
Compact Compressor CC 60
Compact Compressor CC 60
Compressor KK 60 for Pressure-Tests on house connections for gas/water Oil-free, operationally safe compressor for pressurization of gas and water pipes Technical specifications Type: piston compressor, 2 integrated fans for engine and cylinder Power supply: 230 volts, 50 Hz, P = 505 W, Air flow: > 60 l / min, and> 40 l / min at 3 bar Pressure reducer: adjustable output pressure 0.5 bar to 10 bar Operating temperature: - 10 ° C to + 45 ° C Dimension: width 30 cm, depth 22 cm, height 22 cm Weight: 10 kg
Soft case for TONI
Soft case for TONI
Secure storage of the TONI in a custom-fitted device mount. Outer dimensions 272x152x67 mm

Esders blog: information about heating systems and testing processes
Blog

Pressure and leak test of underfloor heating system

Table of Contents The pressure in underfloor heating is essential to ensure that this type of climate control system works properly, is safe and has a long service life. Before activating an installation, it is essential to carry out a pressure or leak test to confirm that there are no leaks or losses in the system. This test is not only a technical requirement, but is also stipulated by special regulations. In this article, we explain the correct pressure for

Read more »
11. June 2025

Our technical articles contain useful information on regulations and compliant application processes for everyday construction site work. For everyone who work and share responsibility.

Contact

Regional Sales Manager

Daniel Hartmann

place
Office in Dortmund
phone
+495961/9565-2668
mail
daniel.hartmann@esders.de
smartphone
+491511/9565021

Regional Sales Manager

Bennett Hoffmann

place
Office in Haren
phone
+495961/9565-2611
mail
bennett.hoffmann@esders.de
smartphone
+49151/41640652

Frequently Asked Questions

There is no such thing as an unnecessary question; there are only too few answers. That is why we are continuously working on listing important questions and answers for test procedures in the field of heating systems here.

Before commissioning a heat pump, a leak test is mandatory – especially for new installations or after repairs to the pipeline. This ensures that leaks can be ruled out and standards such as DIN 1988-2 and EN 806-4 are complied with.

The leak test should be carried out before screed or floor coverings are laid. Our digital measuring devices automatically record all pressure curves and document the results in a legally compliant manner – ideal for new builds and renovations.

The Esders Connect app allows you to automatically save and compare all test reports and send them as PDF files or emails – directly from the construction site. This saves time and simplifies the process of providing evidence to clients or testing centres.

Yes, many of our measuring devices are designed to reliably test both gas installations and heat pump lines. This allows you to efficiently monitor changes in the system without having to switch devices.

Heat pumps may only be filled with refrigerants such as propane (R290) by qualified personnel with a valid certificate for working with refrigerants. This is required by law, as these substances are flammable and environmentally hazardous.

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