Inspection Tee 87° Vaillant – DWZ model 303316

Inspection tee 87° Vaillant – DWZ model 303316 is an access fitting designed for plumbing and heating systems where a compact, angled branch is required for inspection, cleaning or installation of sensors and valves. The fitting provides a 87-degree outlet that facilitates access into a pipeline without major disassembly and is intended for use with compatible Vaillant system components. Before installation, verify the connection type and dimensions to ensure correct fit and sealing.

Advantages

The inspection tee offers a space-saving angled branch that simplifies access to the pipe interior for maintenance and inspection. Its design reduces the need to dismantle long sections of piping when installing measuring devices or servicing system components. The fitting is suitable for integration into standard Vaillant installations and supports reliable access while maintaining flow characteristics appropriate for heating and plumbing circuits.

Suitable for

• Creating an access point for inspection and cleaning in heating distribution and plumbing lines
• Installing sensors, temperature probes or small valves without removing long pipe sections
• Service and maintenance tasks where an angled branch facilitates tool or probe insertion
• Retrofit situations in Vaillant-compatible systems requiring an inspection opening

Key specifications

• Angled branch: 87° outlet for compact access to pipe interior
• Function: access/revision fitting for inspection, cleaning and installation of small components
• Compatibility: designed for use with Vaillant system components (confirm matching connections and dimensions before fitting)
• Typical application area: heating and potable water distribution circuits

How to use

Install the inspection tee in a prepared section of the pipeline where access is required, ensuring the connection type and dimensions match the existing system. Follow standard pipe preparation and sealing procedures applicable to the material and connection type in use. Position the 87° outlet to allow convenient access for probes, sensors or cleaning tools. After installation, perform leak and pressure tests according to local codes and system manufacturer instructions.

Usage recommendations

Verify compatibility with the existing Vaillant system components and select the installation location to provide safe, ergonomic access for inspection and servicing. Use appropriate seals and tightening torques for the connection type and follow local regulations for heating and plumbing installations.