The 3-hose charging set ensures stability and durability even in demanding conditions, making it ideal for professional applications. Thanks to their robustness, the hoses are suitable for all common refrigerants.

The 3-hose charging set with valve is compatible with all common refrigerants and has integrated shut-off valves for precise flow control. The high-quality construction guarantees stability and durability, even in demanding conditions. Dimensions: 1/4" - 1/4" SAE, length 1.5 m.

The 3-hose charging set with valve is compatible with all common refrigerants and has integrated shut-off valves for precise flow control. The high-quality construction guarantees stability and durability, even in demanding conditions. Dimensions: 1/4" - 5/16" SAE, length 1.5 m.

The vacuum hoses are compatible with all common refrigerants and offer a high level of safety thanks to their robust construction. Made of high-quality materials, they meet SAE J2196 standards and minimize refrigerant loss.

Transform your smartphone or tablet into your most powerful diagnostic tool with the <strong>testo 550i BluetoothSmart Block Kit</strong>. Designed for modern HVAC technicians, this screenless, Bluetooth-enabled smart probe features a built-in 2-way valve block and sturdy hook, as well as (2) testo 115i Smart temperature clamps and (2) testo 605i Thermohygrometers, delivering extensive measurement capabilities in an exceptionally compact kit.<br />
Ditch the bulky equipment and carry out your everyday service, maintenance, and diagnostics on refrigeration systems, air conditioning units, and heat pumps completely wirelessly. With the testo 550i, you get industry-leading accuracy and reliability, all controlled seamlessly through the <strong>testo Smart App</strong>.

<div style="background-color: #fff4e5;border: 2px solid #ff9900;border-top-left-radius: 16px;border-top-right-radius: 16px;padding: 1rem;margin: 0 -1rem 1.5rem;">FREE VETO MB3 Bag with purchase, now through July 31st, 2026.<br />
<a href="https://www.testo.com/en-US/promo">>> FIND OUT MORE</a></div>
<p>With this kit, you&rsquo;ll be ready to start your measurements in the commissioning, servicing and maintenance of refrigeration and air conditioning systems and heat pumps straight away: You will get the testo 550s smart digital manifold with Bluetooth and 2-way valve block, two wired clamp temperature probes (NTC) and a rugged transport case. Additional Bluetooth probes, e.g. for wireless measurements of temperature and vacuum, are available separately.<br /><br /><strong>*A2L Refrigerant Compliant*</strong></p>

<div style="background-color: #fff4e5;border: 2px solid #ff9900;border-top-left-radius: 16px;border-top-right-radius: 16px;padding: 1rem;margin: 0 -1rem 1.5rem;">FREE VETO MB3 Bag with purchase, now through July 31st, 2026.<br />
<a href="https://www.testo.com/en-US/promo">>> FIND OUT MORE</a></div>
<p>Start your wireless measurements on refrigeration and air conditioning systems and heat pumps straight away. The practical kit containing the testo 558s digital manifold with Bluetooth connection to the wireless temperature and vacuum probes, together with the 4-hose charging set included in the kit, offers the ideal basis for carrying out everyday measuring tasks. The testo 558s offers intuitive operation thanks to its touchscreen and clear measurement graphs on a large colour display. In addition to the touchscreen, the manifold can also be operated via keys when working with gloves. Thanks to its A3 and A2L compatibility, high robustness with IP54 and hybrid charging system comprising rechargeable and non-rechargeable batteries, the manifold is ideal for every situation.</p>

The testo 550i app-controlled digital manifold with Bluetooth <sup>&reg;</sup>, 2-way valve block and sturdy hook offers extensive measurement technology in an exceptionally compact format. Use this extremely robust manifold to carry out your everyday work on refrigeration and air conditioning systems and heat pumps wirelessly, with ease and reliability. All using the testo Smart App on your smartphone or tablet.<br />
<br />
<strong>*A2L Compliant*</strong>

The kit for app-controlled, wireless measurements and digital documentation on your smartphone. You will get the testo 550i app-controlled digital manifold with Bluetooth, 2-way valve block and sturdy hook, two testo 115i wireless clamp thermometers (Bluetooth, NTC) and a rugged transport case. For other wireless measurements, the optional Testo Smart Probes for temperature, humidity and vacuum are the perfect addition. You&rsquo;ll be ideally equipped to carry out your measuring tasks on refrigeration and air conditioning systems and also heat pumps.<br />
<br />
<strong>*A2L Compliant*</strong>

The kit for app-controlled, wireless measurements and digital documentation on your smartphone. You will get the testo 550i app-controlled digital manifold with Bluetooth, 2-way valve block and sturdy hook, testo 552i wireless vaccum probe (Bluetooth), two testo 115i wireless clamp thermometers (Bluetooth, NTC) and a robust transport case. For other wireless measurements, the optional Testo Smart Probes for temperature, humidity and vacuum are the perfect addition. You&rsquo;ll be ideally equipped to carry out your measuring tasks on refrigeration and air conditioning systems and also heat pumps.<br />
<br />
<strong>*A2L Compliant*</strong>

<div style="background-color:#dae4ea; border: 1px solid #648798; padding: 10px;"><b>Are you interested in this measuring instrument?<br/>Testo has put together practical kits for you – so you’ll be optimally equipped to tackle your measuring tasks right away <a href="https://www.testo.com/en-US/products/manifold">>> To the products</a></b></div>

<div style="background-color: #fff4e5;border: 2px solid #ff9900;border-top-left-radius: 16px;border-top-right-radius: 16px;padding: 1rem;margin: 0 -1rem 1.5rem;">FREE VETO MB3 Bag with purchase, now through July 31st, 2026.<br />
<a href="https://www.testo.com/en-US/promo">>> FIND OUT MORE</a></div>
<p>The kit for wireless measurements in the field of commissioning, servicing and maintenance of refrigeration and air conditioning systems and heat pumps: You will get the testo 550s smart digital manifold with Bluetooth and 2-way valve block, two testo 115i wireless clamp thermometers (Bluetooth, NTC) and a rugged transport case. Additional Bluetooth probes, e.g. for wireless, hose-free vacuum measurements with the testo 552i, are available separately.\<br />
<strong>*A2L Refrigerant Compliant*</strong><br />
&nbsp;</p>

<div style="background-color: #fff4e5;border: 2px solid #ff9900;border-top-left-radius: 16px;border-top-right-radius: 16px;padding: 1rem;margin: 0 -1rem 1.5rem;">FREE VETO MB3 Bag with purchase, now through July 31st, 2026.<br />
<a href="https://www.testo.com/en-US/promo">>> FIND OUT MORE</a></div>
<p>The kit for wireless measurements in the field of commissioning, servicing and maintenance of refrigeration and air conditioning systems and heat pumps: You will get the testo 550s smart digital manifold with Bluetooth and 2-way valve block, two testo 115i wireless clamp thermometers (Bluetooth, NTC), testo 552i wireless vacuum probe (Bluetooth), and a rugged transport case. Additional Bluetooth probes are available separately.<br /><br /><strong>*A2L Refrigerant Compliant*</strong></p>

<div style="background-color: #fff4e5;border: 2px solid #ff9900;border-top-left-radius: 16px;border-top-right-radius: 16px;padding: 1rem;margin: 0 -1rem 1.5rem;">FREE VETO MB3 Bag with purchase, now through July 31st, 2026.<br />
<a href="https://www.testo.com/en-US/promo">>> FIND OUT MORE</a></div>
<p>The kit for wireless measurements in the field of commissioning, servicing and maintenance of refrigeration and air conditioning systems and heat pumps: You will get the testo 550s smart digital manifold with Bluetooth and 2-way valve block, two testo 115i wireless clamp thermometers (Bluetooth, NTC), testo 552i wireless vacuum probe (Bluetooth),&nbsp; a set of 3 refrigerant hoses and a rugged transport case. Additional Bluetooth probes are available separately.<br /><br /><strong>*A2L Refrigerant Compliant*</strong></p>

The testo 557s digital manifold with Bluetooth and a 4-way valve block features a large graphic display, a compact, robust housing, guided measurement menus and the testo Smart App. Top-quality measurement technology, a high degree of reliability and smart functions for quick, easy measurements and documentation make the testo 557s manifold a reliable partner for your commissioning, servicing and maintenance of refrigeration and air conditioning systems and heat pumps.

Start your wireless measurements on refrigeration and air conditioning systems and heat pumps straight away. Thanks to the Bluetooth vacuum probe supplied, you can even measure vacuum without any cables or hoses. You will get the testo 557s smart digital manifold with Bluetooth and 4-way valve block, one testo 552i wireless vacuum probe (Bluetooth), two testo 115i wireless clamp thermometers (Bluetooth, NTC) and a robust transport case. For other wireless measurements, other optionally available testo Smart Probes are also ideal.<br />
<br />
<strong>*A2L Compliant*</strong>

For completely wireless measurements on refrigeration and air conditioning systems and heat pumps. Thanks to the Bluetooth vacuum probe supplied, you can even measure vacuum without any cables or hoses. You will get the testo 557s smart digital manifold with Bluetooth and 4-way valve block, one testo 552i wireless vacuum probe (Bluetooth), two testo 115i wireless clamp thermometers (Bluetooth, NTC), a 4 hose set&nbsp; and a rugged transport case. For other wireless measurements, the Testo Smart Probes are ideal.<br />
<br />
<strong>*A2L Compliant*</strong>

<div style="background-color: #fff4e5;border: 2px solid #ff9900;border-top-left-radius: 16px;border-top-right-radius: 16px;padding: 1rem;margin: 0 -1rem 1.5rem;">FREE VETO MB3 Bag with purchase, now through July 31st, 2026.<br />
<a href="https://www.testo.com/en-US/promo">>> FIND OUT MORE</a></div>
<p>The testo 558s offers an intuitive app feel in the manifold, with touchscreen and clear measurement graphs on a large colour display. In addition to the touchscreen, the manifold can also be operated via keys when working with gloves. Thanks to its A3 and A2L compatibility, high robustness with IP54 and hybrid charging system comprising rechargeable and non-rechargeable batteries, the manifold is ideal for every situation.</p>

<div style="background-color: #fff4e5;border: 2px solid #ff9900;border-top-left-radius: 16px;border-top-right-radius: 16px;padding: 1rem;margin: 0 -1rem 1.5rem;">FREE VETO MB3 Bag with purchase, now through July 31st, 2026.<br />
<a href="https://www.testo.com/en-US/promo">>> FIND OUT MORE</a></div>
<p>Start your wireless measurements on refrigeration and air conditioning systems and heat pumps straight away. The practical kit containing the testo 558s digital manifold with Bluetooth connection to the wireless temperature and vacuum probes offers the ideal tools for everyday tasks. The testo 558s offers intuitive operation thanks to its touchscreen and clear measurement graphs on a large colour display. In addition to the touchscreen, the manifold can also be operated via keys when working with gloves. Thanks to its A3 and A2L compatibility, high robustness with IP54 and hybrid charging system comprising rechargeable and non-rechargeable batteries, the manifold is ideal for every situation.</p>

Robust charging hose adapter with 1/4" SAE male thread to 5/16" SAE female thread.

Charging hose adapter 1/4" - 5/16" SAE

Charging hose adapter 1/4" - 5/16" SAE